Overwintering Egg Populations of a Pine Sawfly, Neodiprion autumnalis, on Ponderosa Pine near Ft. Meade in South Dakota(1991)
In 1990, a number of outbreaks of the pine sawfly, Neodiprion autumnalis, were reported in western South Dakota and eastern Wyoming. Overwintering egg populations were surveyed near Ft. Meade, South Dakota to assess potential for defoliation in 1991. Defoliation in 1991 is expected to be severe at the infestation center with mass starvation of larvae likely. High mortality from starvation and other factors, such as parasites and predators, may contribute to collapse of the population in 1992. Tree mortality is not likely to result from defoliation alone, but drought stress and subsequent infestation by Ips bark beetles may cause small losses.
Publication DateApril, 1991
Citation InformationJudith E Pasek. "Overwintering Egg Populations of a Pine Sawfly, Neodiprion autumnalis, on Ponderosa Pine near Ft. Meade in South Dakota" (1991)
Available at: http://works.bepress.com/judith_pasek/30/