Effects of Systemic Insecticide-Nematicides on Midseason Pest and Predator Populations in Soybean

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In seven field experiments conducted during 1979 and 1980, the nematicides aldicarb, BAS 263, carbofuran, carbosulfan, fenamiphos, oxamyl, phorate, and terbufos were evaluated in different formulations, rates, and methods of application for nematode control, phytotoxic effects and interactions between herbicides and new nematicides, and systemic activity against soybean pest and beneficial arthropods. Eleven treatments suppressed Cerotoma trifurcate (Forster) numbers at 21 days after planting. Aldicarb, BAS 263, and carbofuran reduced Empoasca fabae (Harris) numbers at 36 to 50 days after planting. Most treatments suppressed Sericothrips variabilis (Beach) numbers at 36 days, but not at 50 days. Geocoris spp. numbers were reduced by both aldicarb and carbofuran at 46 days after planting. In one experiment, Nabisspp. numbers were reduced by all pesticides at 44 days after planting. The use of systemic insecticide-nematicides at planting had no measurable effect on midseason pest or predator populations in soybean.

Document Type: Research Article

Publication date: August 1, 1983

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