Mb. Griffith et al., EFFECTS OF AERIAL APPLICATION OF DIFLUBENZURON ON EMERGENCE AND FLIGHT OF ADULT AQUATIC INSECTS, Journal of economic entomology, 89(2), 1996, pp. 442-446
Malaise traps were used to monitor emergence and flight distances of a
dult Plecoptera and Trichoptera from headwater streams in tile Fernow
Experimental Forest, West Virginia, before and after application of di
flubenzuron. Diflubenzuron was applied to 2 stream catchments in May 1
992. Emergence and flight distances in 2 treatment and 2 reference cat
chments were assessed with 5 traps placed at various distances from ea
ch stream during April through September 1991 and 1992. The regression
of the number of adults caught in each trap versus distance of the tr
ap from the stream was compared among years and treatments for each sp
ecies to determine if diflubenzuron affected adult emergence. The emer
gence of the stonefly, Peltoperla arcuata Needham, during the first 4
mo after treatment was reduced in die treatment catchments compared wi
th the untreated catchments. Adults of other species were not reduced
in the treatment catchments during the period of study. However, addit
ional detritivorous species might have shown an adverse effect if the
monitoring had been extended through the period after diflubenzuron-tr
eated leaves entered the streams.