Jd. Barbour et Rl. Brandenburg, IMPACT OF TYPE AND TIMING OF SOUTHERN CORN-ROOTWORM TREATMENTS ON PREDACEOUS ARTHROPODS IN PEANUT, Journal of entomological science, 30(4), 1995, pp. 447-462
At-flowering and at-pegging treatments of soil-applied insecticides fo
r southern corn rootworm, Diabrotica undecimpunctata howardi Barber, c
ontrol were examined to determine if type and/or timing of insecticide
affected the abundance of predaceous arthropods in reproductive-stage
peanuts. Orius insidiosus (Say) and spiders comprised the majority of
predators captured during the study. Effects of timing were variable,
but indicated that earlier, at-flowering pesticide application may al
low for better re-establishment of some predators (e.g., O. insidiosus
), and for the total number of predators, than later, at-pegging pesti
cide applications. There was no consistent effect of chlorpyrifos or f
onophos applied at flowering, or chlorpyrifos or ethoprop applied at p
egging, on predator abundance in reproductive-stage peanuts.