. Eastern forest insects. Forest insects. F-505549 Figure 94.âCone damage by the white-pine cone beetle, Conophthorus M 1 1 Jl 1^ m |:m ! [â ] 1 i tH ):h] u$. $8 h f£s 1 1; P/ rx i Vf siderable damage also results from attacks on first-year conelets, shoots, and occasionally buds and male flowers. The red-pine cone beetle, Conophthorus resinosae Hopk., occurs in southeastern Canada and the northern tier of states from Maine to Minnesota. It breeds by preference in second-year red pine cones, but also attacks current-year red pine shoots and occasionally second-year jack pine cones
. Eastern forest insects. Forest insects. F-505549 Figure 94.âCone damage by the white-pine cone beetle, Conophthorus M 1 1 Jl 1^ m |:m ! [â ] 1 i tH ):h] u$. $8 h f£s 1 1; P/ rx i Vf siderable damage also results from attacks on first-year conelets, shoots, and occasionally buds and male flowers. The red-pine cone beetle, Conophthorus resinosae Hopk., occurs in southeastern Canada and the northern tier of states from Maine to Minnesota. It breeds by preference in second-year red pine cones, but also attacks current-year red pine shoots and occasionally second-year jack pine cones. The adult is shiny black, with sparse short fine hairs and is about 3 to mm. long (U63). Seasonal activity begins in May when the overwintering adults emerge and attack current-year's shoots and second-year cones of red pine. The adults feed for a few weeks and then attack cones for oviposition purposes. Cones are entered by females near the petiole on the underside, the entrance tunnel often forming an open groove at the cone base. The tunnel is extended to the pith and is then continued in the pith to the end of the cone. Eggs are deposited singly in niches along the sides of the tunnel. After oviposition is completed, the female returns to the base, fills the base of the tunnel with a plug of resin and debris, then vacates the cone. Infested cones soon wither, harden, turn brown, and occasionally drop from the tree. The larvae feed on seeds and scales in the cone and pupate in frass-lined cells, often near the base. New adults remain inside the dead cones at least until they become hard and black. During late summer, they emerge either through the plugs in the bases of the tunnels, or through the top or sides of the cones. Soon after emergence they bore into short, current-year's red pine shoots and then tunnel forward through the pith into vegetative buds where they spend the winter. Weakened at points of beetle entry, these shoots soon break off 257. Please note
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Keywords: ., bookcentury1900, bookcollectionbiodive, booksubjectforestinsects
