Injection into trees more than 2 inches in diameter that will not produce food within a year after treatment: Use as directed for black vine weevil larvae, bronze birch borer, cottonwood longhorned borer, flatheaded borers including alder and birch borer, pine tip moth larvae and other listed pests. 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. Termites left the wood … The large pine weevil is the most destructive insect pest in Irish forests. A white pine weevil is also referred to as a spruce weevil or an Engelmann spruce weevil. White Pine Weevil Control Tips Attacks white pines, spruces More common in pure plantings Adults emerge in early spring when T > 50 F (as early as March in PA), Treat in early spring when adults emerge with borer pesticide Mechanically remove Shepard’s Crooks before August 1. 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. Pine Sawyer - Pine Wood Nematode. Not to be confused with western pine beetle, the white pine weevil infests and kills the terminal leader of young trees. Pupa and Larva: The pupa is creamy white and the size of the adult weevil. ... Fallowing – leaving sites unplanted for 2-4 years following clearfelling by which time the emergence of weevil larvae from the stumps will have passed. Unlike the white pine weevil, the deodar weevil remains inactive during the summer in the ground litter. Figure 7. The deodar weevil is active all winter and lays eggs in the fall and winter in small puncture holes chewed in the bark. White Pine Weevil Damage. Cypress weevil larvae were reported to feed in the wood around the crown or base of the Leyland cypress. White pine weevil attack frequently results in the destruction of the terminal leader, leading to distorted growth of the tree. BACKGROUND. Photo by Stephen Dicke, Leake County, 2016. The middle cocoon was opened to reveal a pupa. Its host range includes Scotch, jack, red, pitch, and eastern white pines as well as Douglas-fir and all spruces. ... Larvae construct pupal chambers under the bark of the leader, and line them with fine shavings of wood and inner bark. Galleries created by deodar weevil larvae in the winter. Destruction due to a white pine weevil is very distinctive. The white, legless larvae are almost 2" long when full grown. Figure 6. The larva hatches from a small white egg that is usually laid in buried pine slash, in the roots of freshly cut pine stumps, or In the springtime, female weevils begin laying eggs and feeding on branch tips at the top of their favorite tree hosts. After emerging in spring, white pine weevils feed on succulent bark of white pines 7 to 10 inches below the top most bud of the terminal stem. The larvae have feeding habits similar to white pine weevil larvae in that stems are often girdled. The larva is also the size of the adult weevil (1/4 to 1/3 inch long) with a white, legless body and an orange to amber colored head. White Pine Weevil (Pissodes strobi) is a native conifer pest with a wide host appetite. Pine sawyer beetles have segmented antennae that are much longer than their body. Here we evaluated for the first time the effects of Bacillus thuringiensis (Bt) strains … It lives in the canopy of coniferous trees and breeds in the cut stumps of trees following clearfelling. Tunnels are much larger than those of Ips engraver and southern pine beetles. The white pine weevil is a native North American insect that poses a serious threat to spruce and pine trees across the continent, mostly in the northern US and Canada. In the process, … Indeed, the weevil's love of spruce is exemplified by its alternate common name, Engelmann Spruce Weevil, or simply Spruce Weevil. Females move to the very tip of the leader to make more holes in … White pine adults feed on the inner bark by … Deodar weevil larvae form a wood chip cocoon in late winter.
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