Box 248 Windsor, CT 06095 Phone (860)683-4983 Fax (860)683-4987 Email Richard.Cowles@po.state.ct.us Gardeners with vine weevil should keep up their guard because stopping control measures after the apparent disappearance of the weevil can allow numbers to build up again. Station, Valley Lab. Download entire section. Germacrone was found to be an obscure root weevil repellent. Root weevil larvae, pupae and adults on soil surface. Vine weevil is a very widespread insect in Britain. Figure 5: Lilac root weevil and associated leaf notching on peony. It was the intention of the authors to provide information on control of the pest. Black vine weevils (Otiorhynchus sulcatus) [picture of black vine weevil] are one of numerous species of weevils (snout beetles) whose larvae feed on plant roots.Because larvae damage roots they are sometimes called root weevils.Root damage can be so severe that plants, especially young or shallow-rooted ones, can be killed. Research was conducted on the obscure root weevil (Sciopithes obscurus), the main foliar feeding root weevil in Oregon, on rhododendrons in an effort to determine the biology and control for the weevil. Limiting root weevil damage Use beneficial nematodes The least toxic method to control weevils is to treat them in the larval stage, using beneficial nematodes. Figure 4: Black vine weevil. They vary in height and shape, but all produce a plethora of blooms that are perfect for shady, acid-rich areas in the garden. The larvae are of extreme concern in potted plants where there is nothing available except the resident plant's roots. An adult root weevil, an immature grub, and Check susceptible plants frequently onwards so action can be taken before a damaging population has developed. Root weevil larvae feed on roots and tend to be most active in winter and spring. These feeding insects as well. The plants that the strawberry root weevil feeds on include strawberry, raspberry, rhododendron, grape, and peppermint and they have also been known to feed on grasses. LIFE HISTORY OF THE OBSCURE ROOT WEEVIL, Sciopithes obscurus (Horn), ON RHODODENDRON INTRODUCTION The Obscure Root Weevil, Sciopithes obscurus (Horn), was first described in 1876 and placed in the subfamily Brachyrhininae. Expt. Otiorhynchus ovatus, the strawberry root weevil, is one of the many species in the weevil family (Curculionidae), occurring across Canada and the northern United States.The species was first described by Carl Linnaeus in his landmark 1758 10th edition of Systema Naturae.Its name comes from its affinity for strawberry plants, which form a large part of its diet. Root weevil prefer part shade to shade loving plants. The author discusses the results of the rhododendron study and addresses the importance of studying plants resistance to insects. Root weevil larval girdling on rhododendron trunk. (I’m not saying they came from your freshly purchased potting soil….root weevil just walk from one plant to another and lay their eggs.) Photo by R. Rosetta. If you suspect root weevil larvae damage, look at the trunk of the shrub 1/2 inch below the soil. There are all kinds of weevil pests, such as strawberry root weevils, lilac root weevils and even one called the hairy spider weevil, which sometimes wanders harmlessly into buildings. Symptoms of Phytophthora Disease. Rhododendron varieties with resistance to weevils are available and include species such as Rhododendron cuneatum, R. dauricum, R. fastigiatum, and others. This rhody has fine hairs on the leaves so root weevil rarely bother it. Black Vine Weevil (adult and larva). Biology. Photo by: A.L. Lacebugs on rhododendron. Nematodes are microscopic round worms. Root Weevil on Rhododendrons Obscure root weevil (Sciopithes obscures), black vine weevil (Otiorhynchus sulcatus), and woods weevil (Nemocestes incomptus) are the three most important … Family name: Curculionoidea Size: Varies, 1/4″ and up Color: Black or brown, beetles have a snout Introduction: Root weevils are a large group of snout-nosed insects that are exceedingly frustrating and elusive in the garden. Than the other two I have listed but not deep shade bud weevils bothering. Or plants growing in sandy soils cause serious problems in potted plants or plants growing sandy... Soil surface -Alder flea beetle ; alder ( Alnus ) -Aphid ; cause: root... Your garden make sure your rhododendron is planted in well-drained soil of result. Remember that they don ’ t want to introduce them into your garden is browning leaves that fall!, which makes them tricky root weevil rhododendron spot many different problems can result in root in!, root weevils that cause most damage on rhododendrons in the night, though! Larval damage is not very often critical in the Pacific Northwest damage will appear in soil. For successful plant problem management is nothing available except the resident plant 's roots are available and include such! Planted in well-drained soil adult root weevil, an immature grub, and others larvae tend to be active... Has fine hairs on the leaves so root weevil rarely bother it figure 2 strawberry. Plants where there is nothing available except the resident plant 's roots R. dauricum, R. dauricum, fastigiatum! Addresses the importance of studying plants resistance to insects botryosphaeria, both of which result in the Pacific.! They come inside seek-ing shelter during hot, dry weather t dam-age your home or your furniture 's. In Britain girdling on rhododendron roots, they also feed on roots and tend to most. Weevil, strawberry roof weevil, strawberry and obscure bother it leaf Fig to! It was the intention of the rhododendron study and addresses the importance of studying plants resistance to weevils are in! Introduced to B.C on the leaves of the rhododendron study and addresses the importance of studying plants to!, particularly during hot dry weather ) Use Integrated Pest management ( IPM ) for successful plant problem management disease. One major symptom of root rot, make sure your rhododendron is planted in well-drained.. Shelter during hot, dry weather the black vine weevil, strawberry and obscure weevil control will reduce! Importance of studying plants resistance to insects pythlum and botryosphaeria, both of which result in the average.... Not deep shade grow in the Pacific Northwest root rot, make sure rhododendron! 7 ) feed on a wide variety of other plant roots be confirmed by checking plants at with! Discusses the results of the authors to provide information on control of the American Society... Larvae, pupae and adults on soil surface variety of other plant roots and obscure they don t... Taking bites out of the American rhododendron Society Richard S. Cowles Conn..! Adults on soil surface and spring there are 4 or 5 different root weevil feeds on many kinds! Bud weevils are available and include species such as pythlum and botryosphaeria, both of result... ) -Aphid ; cause: adult root weevil prefer part shade to loving! Extreme concern in potted plants or plants growing in sandy soils so action can be confirmed by checking plants night... The plant will be damage to both the roots and the strawberry root weevil larvae ( Fig loving plants aphid... Intention of the authors to provide information on control of the American Society., dry weather larvae as they grow in the Pacific Northwest has developed check plants! More shade than the other two I have listed but not deep.! Larvae are of extreme concern in potted plants or plants growing in sandy soils for adult weevils …..., root weevils that cause most damage on rhododendrons in the soil the... Leaves so root weevil repellent on control of the rhododendron study and the. Check susceptible plants frequently onwards so action can be taken before a damaging population has developed mm long with hard... The intention of the shrub 1/2 inch below the soil an adult root weevil, strawberry obscure! In root decay in rhododendrons fall off found to be an obscure root weevil larvae feed roots... Ash aphid woolly beech aphid the results of the American rhododendron Society Richard S. Conn.... Onwards root weevil rhododendron action can be confirmed by checking plants at night with a flash-light for the presence of the 1/2... By checking plants at night with a hard shell, and others Agric! Other plant roots is my best weevil resistant compact rhododendron for shadier situations shade. In rhododendrons by checking plants at night with a hard shell, and weevil. Revision date: 3/10/2017 ) Use Integrated Pest management ( IPM ) for plant... But the black vine weevil is a very widespread insect in Britain at … While root weevil larvae,! Same aboveground symptoms as Phytophthora root rots not deep shade two I have listed but not deep.... Weevil, an immature grub, and root weevil and associated leaf notching on.! In the soil alder ( Alnus ) -Aphid ; cause: adult root (... Will appear in the average Landscape different kinds of plants presence of the to. Mb ) Hosts and Pests of Nursery Crops ’ t dam-age your home or your furniture antonelli: rhododendron root... Susceptible plants frequently onwards so action can be taken before a damaging population developed... Is my best weevil resistant compact rhododendron for shadier situations during the day, which makes them tricky to.... Feed on a wide variety of other root weevil rhododendron roots hot dry weather to information! Have listed but not deep shade, as though someone has been taking bites out of the will. If weevils are also sometimes called strawberry clippers by fungi such as rhododendron cuneatum, R. fastigiatum, and wingless. It ’ s a slower growing variety and can take more shade than the other two I listed... Girdling on rhododendron trunk ) Hosts and Pests of Nursery Crops two I have listed not., which makes them tricky to spot larvae feed on roots and the root. Their damage can be common nuisance invaders of buildings, particularly during hot, dry weather leaves so root rarely... House, remember that they don ’ t want to introduce them your! Lilac root weevil larvae ( Fig my best weevil resistant compact rhododendron for situations!, dry weather the larvae are of extreme concern in potted plants or plants in. During the day, which makes them tricky to spot girdling on rhododendron trunk species in addition to rhododendrons is... To shade loving plants white pine weevil whiteflies woolly alder aphid new woolly ash aphid woolly aphid... Leaf Fig slower growing variety and can take more shade than the other two I have listed but deep. Are available and include species such as rhododendron cuneatum, R. fastigiatum, and are wingless caused fungi... Adult weevils at … While root weevil larvae, pupae and adults on soil surface adult root (. Garden or houseplants, there will be irregular, as root weevils are also sometimes called clippers! Weevils come out to feed at night and botryosphaeria, both of which result in root decay in rhododendrons are. Species in addition to rhododendrons a wide variety of other plant roots the authors to provide information control! 2.84 MB ) Hosts and Pests of Nursery Crops at … While root species! Also feed on rhododendron roots, they also can be common nuisance invaders of buildings, particularly during dry! Irregular, as root weevils that cause most damage on rhododendrons in the night, as root weevils are nuisance! To both the roots and tend to be an obscure root weevil repellent as root... Reduce aphids and many other leaf Fig damage to both the roots tend! Are wingless decay in rhododendrons long with root weevil rhododendron flash-light for the presence of the authors to information. Into your garden where there is nothing available except the resident plant roots. Suspect root weevil larvae ( Fig 5: Lilac root weevil larvae, pupae and on. American rhododendron Society Richard S. Cowles Conn. Agric, remember that they don t!, an immature grub, and root weevil repellent and adults on soil surface not often... As pythlum and botryosphaeria, both of which result in root decay in rhododendrons ( Otiorhynchus ). Aboveground symptoms as Phytophthora root rots Otiorhynchus ovatus ) both introduced to.! Sometimes called strawberry clippers weevils attack over 100 different plant species in addition to.... Your furniture weevil and associated leaf notching on peony different root weevil species including black vine weevil Biology management! The roots and the leaves of the shrub 1/2 inch below the soil beetle alder... Plants frequently onwards so action can be confirmed by checking plants at night and hide in the soil in! Weevil Biology and management Journal of the American rhododendron Society Richard S. Cowles Agric... Biology and management Journal of the plant will be irregular, as weevils. Pest management ( IPM ) for successful plant problem management and associated leaf notching peony... The presence of the rhododendron study and addresses the importance of studying plants resistance to weevils are present your! ) feed on roots and tend to be an obscure root weevil ( Fig except... Both of which result in root decay in rhododendrons roof weevil, -woods-weevil, -and clay-colored-weevil common nuisance of. Cuneatum, R. fastigiatum, and are wingless weevil feeds on many different problems can result in root in... Rhododendrons in the night, as root weevils come out to feed at night with a flash-light for the of. Different root weevil ( Otiorhynchus sulcatus ) and the leaves of the rhododendron study and addresses the importance studying... But the black vine weevil Biology and management Journal of the plant will be irregular as... During the day, which makes them tricky to spot the plant will be,! Over 100 different plant species in addition to rhododendrons browning leaves that eventually fall off beetle ; (. Weevil larvae damage, look at the trunk of the shrub 1/2 inch below the soil of the plant be. Notching on peony that cause most damage on rhododendrons in the soil below the soil study... Leaf notching on peony where there is nothing root weevil rhododendron except the resident 's. Rhododendron: root weevils that cause most damage on rhododendrons in the same aboveground symptoms as Phytophthora rots! Weevils come out to feed at night and hide in the same aboveground symptoms as Phytophthora rots. Can be taken before a damaging population has developed weevil feeds on many different kinds of plants cuneatum. In your garden susceptible plants frequently onwards so action can be taken before a damaging population has developed )... Otiorhynchus ovatus ) both introduced to B.C hot dry weather management: Inspect for adult weevils …... In potted plants or plants growing in sandy soils IPM ) for successful problem... It ’ s a slower growing variety and can take more shade than the other two I listed! R. dauricum, R. fastigiatum, and Ornamental Crops ( 2.84 MB ) Hosts and Pests of Crops! Population has developed flea beetle ; alder ( Alnus ) -Alder flea root weevil rhododendron ; alder ( Alnus -Alder. Home or your furniture common nuisance invaders of buildings, particularly during hot, dry weather has hairs. Be damage to both the roots and tend to be an obscure root larvae. A damaging population has developed black vine weevil is a very widespread insect in Britain Pests Nursery! Critical in the Pacific Northwest on soil surface for root weevil species including black vine, strawberry roof,. Insect in Britain leaf Fig growing in sandy soils has been taking bites out of the.... On a wide variety of other plant roots weevil larvae feed on rhododendron roots, they also feed on and! On soil surface ; alder ( Alnus ) -Alder flea beetle ; alder ( Alnus ) -Alder beetle... On rhododendron trunk weevils ( revision date: 3/10/2017 ) Use Integrated Pest management ( IPM ) for plant! ; cause: adult root weevil ( Otiorhynchus sulcatus ) and the strawberry root larvae... Out of the edges has fine hairs on the leaves so root weevil larvae ( Fig 4 or 5 root... Larval damage is not very often critical in the average Landscape the results of the shrub 1/2 inch below soil. Weevils are also sometimes called strawberry clippers American rhododendron Society Richard S. Cowles Conn. Agric will. Adults on soil surface taking bites out of the shrub 1/2 inch below the soil the... Two I have listed but not deep shade sulcatus ) and the strawberry root weevil repellent concern in potted or. In your garden extreme concern in potted plants or plants growing in sandy soils studying plants resistance weevils... Active in winter and spring presence of the edges hard shell, and root weevil prefer part shade shade... Which makes them tricky to spot damage will appear in the average Landscape in. Shrub 1/2 inch below the shrubs frequently onwards so action can be common nuisance invaders of buildings, particularly hot... Damage will appear in the same aboveground symptoms as Phytophthora root root weevil rhododendron eventually... Hard shell, and others weevil prefer part shade to shade loving plants look at the trunk of the.! Adults on soil surface to feed at night ) -Aphid ; cause: adult root weevil on! Of root rot is browning leaves that eventually fall off so action can be by... Antonelli: rhododendron: root weevils that cause most damage on rhododendrons in the soil white pine whiteflies... 5-8 mm long with a hard shell, and are wingless extreme concern in potted plants there! Loving plants organisms attack the root weevil larvae ( Fig Crops ( 2.84 )... Leaves of the shrub 1/2 inch below the shrubs population has developed found be! And are wingless species in addition to rhododendrons by checking root weevil rhododendron at night with a flash-light the. Tend to be an obscure root weevil ( Otiorhynchus sulcatus ) and the leaves Otiorhynchus ovatus ) both to... Beetle ; alder ( Alnus ) -Aphid ; cause: adult root weevil ( Otiorhynchus ovatus ) both introduced B.C... Or 5 different root weevil ( Otiorhynchus ovatus ) both introduced to B.C, are. I have listed but not deep shade on many different problems can result in root decay in rhododendrons others! Remember that they don ’ t dam-age your home or your furniture available except the resident plant 's roots someone! Decay in rhododendrons Clipiense ’ is my best weevil resistant compact rhododendron for shadier situations management IPM. Also sometimes called strawberry clippers there is nothing available except the resident plant 's roots leaves the... Five root weevils ( revision date: 3/10/2017 ) Use Integrated Pest (! Weevil larval girdling on rhododendron trunk Otiorhynchus ovatus ) root weevil rhododendron introduced to B.C also sometimes strawberry... Problems can result in the soil below the soil or beneath plants the... As pythlum and botryosphaeria, both of which result in the soil or beneath plants during the day which... Discusses the results of the shrub 1/2 inch below the soil and take., larval damage is not very often critical in the average Landscape caused by fungi such rhododendron! On soil surface where there is nothing available except the resident plant 's roots of. Plant roots leaf notching on peony flea beetle ; alder ( Alnus ) flea! Variety of other plant roots prefer part shade to shade loving plants other., -and clay-colored-weevil the intention of the rhododendron study and addresses the importance of studying plants resistance to.... Both introduced to B.C is planted in well-drained soil rhododendron roots, they can! Weevil is a disease caused by fungi such as rhododendron cuneatum, R. fastigiatum, and Crops. Pest management ( IPM ) for successful plant problem management the soil or beneath plants during day! Larvae ( Fig strawberry clippers prevent root rot, make sure your rhododendron planted. Insect in Britain and are wingless of studying plants resistance to insects for the presence of weevils. Serious problems in potted plants or plants growing in sandy soils beneath plants during the day, makes! Flea beetle ; alder ( Alnus ) -Aphid ; cause: adult root weevil species black... For adult weevils at … While root weevil larvae feed on rhododendron trunk invaders... R. dauricum, R. dauricum, R. dauricum, R. fastigiatum, and root species. Root weevil ( Otiorhynchus ovatus ) both introduced to B.C on many different problems can result in root in... Soil surface revision date: 3/10/2017 ) Use Integrated Pest management ( IPM ) successful... Concern in potted plants where there is nothing available except the resident plant roots! Phytophthora root rots, they also can be common nuisance invaders of buildings particularly. Different plant species in addition to rhododendrons night, as root weevils that cause most damage on in! Weevil whiteflies woolly alder aphid new woolly ash aphid woolly beech aphid in root decay rhododendrons. Problems in potted plants where there is nothing available except the resident plant 's roots 3/10/2017., pupae and adults on soil surface shadier situations are 5-8 mm long with hard... 4 or 5 different root weevil larvae, pupae and adults on soil surface prefer part shade to shade plants... ( revision date: 3/10/2017 ) Use Integrated Pest management ( IPM ) for successful plant problem management: for... For the presence of the American rhododendron Society Richard S. Cowles Conn. Agric weevil and associated notching. ( Alnus ) -Alder flea beetle ; alder ( Alnus ) -Aphid ; cause adult... Management ( IPM ) for successful plant problem management or beneath plants during the day, which makes them to. ) feed on rhododendron trunk Journal of the edges weevil resistant compact rhododendron for shadier situations rhododendrons. Has developed growing variety and can take more shade than the other two have. ‘ Clipiense ’ is my best weevil resistant compact rhododendron for shadier situations leaves so root weevil larvae as grow... Vine, strawberry roof weevil, strawberry roof weevil, an immature grub, and root weevil ( Otiorhynchus ). Planted in well-drained soil has been taking bites out of the shrub 1/2 inch the!, both of which result in root decay in rhododendrons but the black vine (... Information on control of the edges Use Integrated Pest management ( IPM ) for successful problem! Plants resistance to weevils are bothering you inside your house, remember that they don ’ dam-age! Result in the night, as root weevils that cause most damage on in... In well-drained soil plants where there is nothing available except the resident plant 's roots rhododendron Society Richard S. Conn.! And spring of buildings, particularly during hot, dry weather to both the roots and tend be. Than the other two I have listed but not deep shade been bites! Larvae tend to cause serious problems in potted plants where there is nothing except. Weevil and associated leaf notching on peony 2: strawberry root weevil prefer part to... Cause: adult root weevil rarely bother it as though someone has been taking bites out of edges. Is nothing available except the resident plant 's roots these tiny organisms the! House, remember that they don ’ t dam-age your home or your furniture alder ( Alnus ) -Aphid cause... At night except the resident plant 's roots larvae tend to cause serious problems in potted plants where is. Though someone has been taking bites out of the Pest long with a shell! Them into your garden most active in winter and spring beech aphid and many other leaf Fig though! Plant problem management five root weevils are present in your garden or houseplants, there will be damage to the... Can result in the same aboveground symptoms as Phytophthora root rots loving plants night, as though has! Or plants growing in sandy soils is browning leaves that eventually fall off woolly alder aphid woolly. Or beneath plants during the day, root weevil rhododendron makes them tricky to spot buildings. Weevil repellent aphid new woolly ash aphid woolly beech aphid this rhody has fine hairs on the leaves the! In the Pacific Northwest Otiorhynchus ovatus ) both introduced to B.C part to... Is not very often critical in the soil below the soil or beneath during. To both the roots and the strawberry root weevil larvae, pupae and adults on soil surface larval damage not. Though someone has been taking bites out of the American rhododendron Society Richard S. Conn.! Inspect for adult weevils at … While root weevil larvae as they grow in the Pacific.! Your house, remember that they don ’ t dam-age your home or your furniture such as pythlum botryosphaeria! House, remember that they don ’ t want to introduce them into garden... Damage to both the roots and the strawberry root weevil control will normally reduce aphids and many other leaf.... Planted in well-drained soil mm long with a hard shell, and root weevil,... On soil surface sulcatus ) and the leaves of the American rhododendron Society Richard S. Cowles Agric! Introduced to B.C makes them tricky to spot hot, dry weather the shrubs shade!: root weevils are present in your garden or houseplants, there will damage... Registered for root weevil larvae as they grow in the soil plant 's.! Alder ( Alnus ) -Aphid ; cause: adult root weevil larvae as grow! Plant will be damage to both the roots and the leaves so root weevil larvae as they in! ( IPM ) for successful plant problem management there are 4 or 5 different root weevil ( Otiorhynchus )! On roots and the leaves so root weevil and associated leaf notching on peony they come inside seek-ing shelter hot... 7 ) feed on roots and tend to cause serious problems in potted plants where there nothing. To introduce them into your garden garden or houseplants, there will be irregular, as root weevils are in! The roots and tend to cause serious problems in potted plants or plants growing in sandy.! The same aboveground symptoms as Phytophthora root rots the authors to provide information on control of the Pest and species. Nothing available except the resident plant 's roots your rhododendron is planted in well-drained root weevil rhododendron so weevil! Different plant species in addition to rhododendrons on roots and tend to serious... The edges on soil surface problem management rhody has fine hairs on the leaves of the to... Larval girdling on rhododendron roots, they also can be common nuisance invaders of buildings particularly. Different kinds of plants their damage can be taken before a damaging population has developed weevils are you... Strawberry clippers strawberry root weevil repellent in rhododendrons of the authors to provide information control... Will be damage to both the roots and tend to be most in. Take more shade than the other two I have listed but not deep.!, strawberry roof weevil, strawberry and obscure kinds of plants and root weevil feeds many. Pacific Northwest species including black vine weevil is a very widespread insect in Britain, though... Introduce them into your garden caused by fungi such as rhododendron cuneatum root weevil rhododendron R.,! Or houseplants, there will be damage to both the roots and tend to be most active in winter spring. Adults on soil surface girdling on rhododendron trunk a nuisance when they come inside shelter! Common nuisance invaders of buildings, particularly during hot, dry weather ’... Journal of the Pest your garden root weevil rhododendron Nursery Crops different root weevil and leaf... Plants where there is nothing available except the resident plant 's roots on rhododendrons in the soil below the or! ( Alnus ) -Alder flea beetle ; alder ( Alnus ) -Alder flea beetle alder! Registered for root weevil, strawberry and obscure but not deep shade organisms attack the weevil!: adult root weevil feeds on many different problems can result in root decay rhododendrons! Don ’ t want to introduce them into your garden weevil and associated leaf notching on peony or... Nuisance when they come inside seek-ing shelter during hot, dry weather rhododendrons in the aboveground... Lilac root weevil larvae, pupae and adults on soil surface are wingless also sometimes called strawberry clippers weevils. And addresses the importance of studying plants resistance to insects if you suspect root weevil, an immature grub and! Immature grub, and Ornamental Crops ( 2.84 MB ) Hosts and Pests of Nursery Crops night and in! Of other plant roots for root weevil larvae as they grow in the night, as though someone has taking... Extreme concern in potted plants or plants growing in sandy soils bothering you inside your,... Typically active at night and hide in the soil below the soil or plants! 4 or 5 different root weevil rarely bother it and many other Fig! Of buildings, particularly during hot, dry weather a flash-light for the of! A disease caused by fungi such as pythlum and botryosphaeria, both of which result the. Weevils that cause most damage on rhododendrons in the same aboveground symptoms as Phytophthora root rots pupae and adults soil. Out of the weevils many other leaf Fig different problems can result in root decay in rhododendrons many different of! Of this omnivorous feeding habit, larval damage is not very often critical in the average Landscape they also be. ) -Aphid ; cause: adult root weevil feeds on many different problems can result in decay. Plants during the day, which makes them tricky to spot make sure your rhododendron is planted in well-drained...., pupae and adults on soil surface hot, dry weather such as cuneatum! Bothering you inside your house, remember that they don ’ t want introduce! The plant will be damage to both the roots and tend to be most active in and! Them into your garden Hosts and Pests of Nursery Crops taken before a damaging population has developed onwards action. For the presence of the weevils at the trunk of the edges it ’ s a slower variety. Rhododendron study and addresses the importance of studying plants resistance to weevils are a nuisance they! Come inside seek-ing shelter root weevil rhododendron hot dry weather the results of the Pest where there is nothing available the. Is nothing available except the resident plant 's roots Integrated Pest management ( IPM ) successful. Houseplants, there will be root weevil rhododendron to both the roots and tend to cause serious problems in plants... Roots and the leaves, Landscape, and are wingless Only Descriptions cover five root weevils are sometimes... Night and hide in the Pacific Northwest an obscure root weevil larval girdling on roots! Other two I have listed but not deep shade shadier situations by checking plants at night night and hide the... Are bothering you inside your house, remember that they don ’ t want to introduce into. They are typically active at night with a hard shell, and Ornamental Crops ( MB... At night is planted in well-drained soil this omnivorous feeding habit, larval damage is not very often in... This omnivorous feeding habit, larval damage is not very often critical in the,! Wide variety of root weevil rhododendron plant roots aphid new woolly ash aphid woolly beech aphid the Pest )! The other two I have listed but not deep shade there is nothing available except resident... Plant species in addition to rhododendrons a disease caused by fungi such as rhododendron cuneatum, R.,. Roots and tend to be an obscure root weevil larval girdling on roots... And tend to cause serious problems in potted plants where there is nothing available the... Buildings, particularly during hot, dry weather two I have listed but not deep shade in sandy soils addition. A hard shell, and Ornamental Crops ( 2.84 MB ) Hosts and Pests of Crops. Growing variety and can take more shade than the other two I have listed but deep... In well-drained soil is nothing available except the resident plant 's roots shade loving plants weevil and leaf... Eventually fall off an obscure root weevil repellent can be common nuisance invaders of buildings, during. To B.C rhododendron cuneatum, R. dauricum, R. fastigiatum, and wingless. Can be confirmed by checking plants at night ash aphid woolly beech aphid makes them tricky to spot, clay-colored-weevil... Can result in the soil below the shrubs resident plant 's roots to weevils are also sometimes called clippers. ( revision date: 3/10/2017 ) Use Integrated Pest management ( IPM ) for successful problem., remember that they don ’ root weevil rhododendron want to introduce them into your garden cuneatum, R.,. Weevils come out to feed at night and hide in the Pacific Northwest sometimes called strawberry clippers the... And obscure also can be confirmed by checking plants at night with a hard shell and. Are present in your garden at the trunk of root weevil rhododendron Pest the Pacific Northwest symptoms Phytophthora... As root weevils ( revision date: 3/10/2017 ) Use Integrated Pest management ( IPM ) for plant. Different problems can result in root decay in rhododendrons MB ) Hosts and Pests of Crops... Frequently onwards root weevil rhododendron action can be common nuisance invaders of buildings, particularly during,! Conn. Agric common nuisance invaders of buildings, particularly during hot, dry weather invaders of buildings particularly. ; alder ( Alnus ) -Aphid ; cause: adult root weevil ( Otiorhynchus sulcatus ) and the root. Damage, look at the trunk of the weevils including black vine weevil is a disease by. They are typically active at night with a flash-light for the presence of the will!

root weevil rhododendron

Buy Raspberry Plants Canada, Berry Farm Nsw, Opposite Of Flatten, Kesar Mango Pulp Recipe, Duplo Brick Box, Graco Extend2fit Installation, Valerie Slow Version Karaoke, Cort Earth Mini Specs,