Em. Barrows et al., DIFLUBENZURON EFFECT ON YELLOWJACKET (HYMENOPTERA, VESPIDAE) WORKER NUMBERS IN A CENTRAL APPALACHIAN BROADLEAF FOREST, Journal of economic entomology, 87(6), 1994, pp. 1488-1493
Ten yellowjacket species, of markedly different abundances, were found
in a central Appalachian broadleaf forest from 1991 to 1993. Malaise-
trap samples indicated that yellowjacket numbers fluctuated greatly be
tween years, as occurs in other habitats. An split-plot analysis revea
led that diflubenzuron decreased worker number in the application year
but not in the postapplication year and revealed no effect of trap si
te on worker sample size.