WebJun 15, 2006 · Pikonema alaskensis is a major pest of juvenile, open-grown spruce throughout central and northeastern North America (Katovich et al., 1995). Black spruce is the primary host of P. alaskensis in central Newfoundland, however white spruce (P. glauca [Moench] Voss) and blue spruce (P. pungens Engelm.) are also susceptible (Forbes, 1949). WebOther native species in North America that frequently plague conifer plantations are the red-headed pine sawfly, Neodiprion lecontei, and the yellow-headed spruce sawfly, Pikonema alaskensis. The European woodwasp, Sirex noctilio , along with a symbiotic fungus, has been a substantial problem in the Southern Hemisphere where it was introduced ...

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WebHerbivorous insects are often exposed to broad temporal and spatial variations in microclimate conditions within their host plants and have adapted a variety of behaviors, such as avoidance or basking, to either offset or benefit from such variation. WebMar 15, 2013 · Our study provides essential insect density–defoliation and defoliation–damage relationships for P. alaskensis in black spruce that may aid in … bipin self tanning lotion

Predicting the seasonal development of the yellowheaded spruce …

WebApr 2, 2012 · Degree-day phenology models for the yellowheaded spruce sawfly, Pikonema alaskensis (Rohwer), were developed from data sets collected in infested plantations of black spruce, Picea mariana (Mill.), and white spruce, P. glauca (Moench) Voss, in New Brunswick and Quebec, Canada, between 1995 and 1999. The models describe the … WebApr 1, 1985 · Abstract Sex pheromone traps for the yellowheaded spruce sawfly, Pikonema alaskensis (Rohwer), and its ichneumonid parasitoid, Syndipnus rubiginosus Walley, were placed in white spruce, Picea glauca (Moench) Voss, plantations in north central Minnesota. bipin rawat helicopter pilot