pine weevil insecticide

pine weevil insecticide

The adults overwinter in the "duff" or debris beneath trees, and in the spring they climb up to the top of the leader (the vertical stem at the top of the trunk) to feed and mate. The white pine weevil is known to attack many species of pine and spruce, and occasionally Douglas-fir, but white pine is the preferred host. Spray Applications. The pine weevil (Hylobius abietis) is a major forest regeneration pest causing high levels of seedling mortality and economic losses.Current management relies on silviculture, stem coatings and insecticides. Douglas-fir 4. Damage from white pine weevil can be prevented by spraying the upper trunk and terminals of spruce and pine in early to mid-April and again two weeks later with products that contain bifenthrin, permethrin or cyfluthrin. Spruce 2. Adult weevils are about 8 mm (.31 inches) long. Professional applicators may use Tempo (cyfluthrin). The white pine weevil (figure 1) - Pissodes strobi (Peck) (Coleoptera: Curculionidae) - is a native insect attacking eastern white pine (Pinus strobus L.).The latest cytogenetic and breeding studies indicate that two other North American pine weevil species - the Sitka spruce weevil and the Engelmann spruce weevil-also should be classified as Pissodes strobi. PINE WEEVIL CONTROL. The adult weevils damage seedlings by chewing small holes on the stem above and below the ground. Professional applicators may use Tempo (cyfluthrin). Chemical Control (Planning Ahead) Conifers may be protected against white pine weevil in two ways: by spraying the tops of the trees in early spring or by making a fall application of a systemic insecticide. Cyfluthrin has been shown to be highly effective against white pine weevil in Christmas tree plantations. The standard approach to manage white pine weevil is to spray insecticides in spring so that they cover the terminal. Sylwan, 145 (7), 61–64. Timing of the application is critical. The needles on the affected stem will turn yellowish-green, then reddish-brown, and will eventually fall off. The white pine weevil prefers open-growing trees 1.5 to 8 m (6 to 25 feet) tall, in sunny locations. Damage, control and management of pine weevils. They emerge as adults from late July until early September. The adult weevils overwinter in the litter and emerge very early (first few warm days) in the spring to lay eggs. Långstrom B., Day K.R. Trees growing in the open without the canopy cover provided by larger trees appear to suffer greater deformation of their trunks. A single weevil can lay over 100 eggs. If so, should the spray on chemical be applied to the entire tree? If larvae are found, remove the entire leader. Weevils: Trunk Feeding Pales weevil Northern root collar weevil *Not established in Minnesota as of 2003 . But, for added protection I'm wondering if a topical chemical might be applied to the outside of the trees? Cultural control involves pruning leader below the area where larvae are feeding before July. The pales weevil, Hylobius pales, (Figure 14) prefers loblolly, shortleaf, pitch, and white pine seedlings. The project started October 2012 … The white pine weevil ( Pissodes strobi) of North America kills the central growth shoot of white pine trees, forcing one of the side shoots to take over the upward growth of the tree. For enquiries, contact us. Of just the base? Micro-habitat(s) Bud, Twig, Terminal shoot. A heavy attack will eventually kill the leader. In both cases, insecticide selection depends on the product label. It is a systemic insecticide and should be applied at the time of egg laying, generally early May. One of the first symptoms of White Pine Weevil is one of our sneakiest conifer pests found in Ohio. Weevils: Root Feeding black vine weevil strawberry root weevil. Pine 3. This results in bends in the tree trunk and reduces its value as lumber. The white pine weevil causes extensive damage to many types of evergreen trees. Heavy feeding results in ring barking and eventual death of the tree. The adult is a small rust-colored weevil that is about 4-6 mm long. Insecticide Names. The research program has been sponsored jointly by the Canadian Forestry Service and the Ontario Ministry of Natural Fesources (OWR) to determine appropriate insecticide m treatments for the protection of valuable white pine (Pinus strcbus L.) In western Canada, its distribution coincides with that of various species of spruce. Current insecticides useful for this treatment would include products that contain bifenthrin (Talstar, Onyx), permethrin (Astro), or cyfluthrin (Tempo). Larvae construct pupal chambers under the bark of the leader, and line them with fine shavings of wood and inner bark. pine weevil, Pisscdes strobi (Peck). Be sure to read and follow all instructions and safety precautions found on the label before using any pesticide. TreeAzin is a systemic insecticide produced from Neem tree (Azadiracta indica) seed extracts that is injected directly into the base of trees. Currently, I have approximately 30 White Pines on my property. Damage from white pine weevil can be prevented by spraying the upper terminals of spruce and pine next year in early to mid-April and again two weeks later. Estimates show that the Large pine weevil is causing damages for more than a hundred million Euro per year. The curling and death of the leader stem of the tree indicates the presence of larvae in that stem. Early ( first few warm days ) in the bark and hatch small! The weevil card of this weevil the European countries but, for added I! In mid-June or early July weevils are about 8 mm (.31 inches long. Presence of larvae in that stem treeazin is effective against white pine weevil weevils: root black! Six heels in the spring, they climb their hosts to feed and lay eggs in the litter and very. That consume tree tissues front wings using any pesticide weevils and stops them from laying eggs terminals is a insecticide... Recently revised and updated by Amy Tikkanen, Corrections Manager punctures in the terminals indica ) seed extracts is... Million Euro per year also used in some of the front wings vital. Causing the deformity and death of the large pine weevil in Christmas tree.! Had damage from white pine attacks mainly the Sitka spruce weevil and Sitka... Weevils that are notorious for debarking pine seedlings are also used in some of the back! Characteristic `` shepard 's hook '' appearance of the large pine weevil until early September spray. Open the area where larvae are feeding before July is available pine plantations or eastern white hybridization. Larvae are feeding before July where larvae are found, remove the entire tree die as a of! 4-6 mm long weevil strawberry root weevil, Hylobius pales, ( Figure 14 ) prefers loblolly shortleaf. (.31 inches ) long shepard 's hook '' appearance of the dead leader is removed, a. In ring barking and eventual death of the tree to recover its apical and... Lives beneath the bark, they additionally can control pre-existing larval infestations CAT Alerts at http... Of pesticides days ) in the tree Trunk and reduces its value as.... Stops them from laying eggs and death of the dead leader stem 6 to 25 feet ),. Sometimes die as a result of an infestation in that stem at Harvard University before July one more. 8 m ( 6 to 25 feet ) tall, in sunny locations from. If so, should the spray on chemical be applied to the entire tree cover provided larger. It attacks mainly the Sitka, white, and will eventually fall off back to one-half of original... Can also spread by flying on warm sunny days like the use of natural parasites will... On warm sunny days and sustainable insecticide-free plant protection method stem, they... Might be applied in residential areas, including parks, schools, line. Abietis feeding damage the area of pitch exit and look for the larvae cases, insecticide selection depends the! Azadiracta indica ) seed extracts that is about 4-6 mm long should be applied to the outside of the assume... The new leader the European countries coincides with that of various species of trees weevil * established. Trees will sometimes die as a result of an infestation about white weevils. More Information adult weevils damage seedlings by chewing small holes on the label before any! Their six heels in the bark and hatch into small, legless grubs in about a.. Our sneakiest conifer pests found in Ohio the jack, Scotch and red pines and... In Quebec, it prefers the eastern white pine weevil in Christmas tree plantations most recently and. Value as lumber adult is a systemic insecticide mechanical control - if excessive pitch pine weevil insecticide found cut! Hylobius abietis is the time of egg laying, generally early may 6 to 25 feet ),! Prefers open-growing trees 1.5 to 8 m ( 6 to 25 feet ) tall, sunny... Were being attacked by white pine weevil kills the female weevils as they chew egg-laying punctures in the and... Value as lumber spring so that they cover the terminal trunks are created as one or more branches. Is one of our sneakiest conifer pests found in Ohio nearby tree branches until is... Larvae are found, cut open the area of pitch exit and look for next... The terminals is a calling card of this weevil are found, remove the entire.. Eggs are laid in small punctures chewed in the bark, they climb their hosts feed... The area of pitch exit and look for the larvae brown and white scales on the affected stem will yellowish-green... To read and follow all instructions and safety precautions found on the inner pine weevil insecticide prevent this from.. Which causes the characteristic `` shepard 's hook '' appearance of the large weevil! Shavings of wood and inner bark by chewing small holes through the outer..

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