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ARS Home » Plains Area » Brookings, South Dakota » Integrated Cropping Systems Research » Research » Publications at this Location » Publication #189163
Title: FOLIAR TREATMENTS IN SOYBEAN, 2005

Author
item Hesler, Louis
item Lehman, R - Michael
item Dashiell, Kenton
item CATANGUI, MICHAEL - SOUTH DAKOTA STATE UNIV

Submitted to: Arthropod Management Tests
Publication Type: Other
Publication Acceptance Date: 9/14/2006
Publication Date: 11/4/2006
Citation: Hesler, L.S., Lehman, R.M., Dashiell, K.E., Catangui, M.A. 2006. Foliar treatments in soybean, 2005. Arthropod Management Tests. Vol 31, p. F41.

Interpretive Summary: Soybean aphid infestations can reduce the yield of soybeans, and thus the efficacy of new spray treatments should be evaluated for control of this pest. Two foliar insecticides were tested against soybean aphid in small plots of soybeans near Brookings, South Dakota in 2005. Post-treatment counts showed that Asana XLTM, a conventional insecticide, reduced the number of soybean aphids per plant compared to MicroACTM, an entomopathogenic fungal formulation, and a distilled water check. Soybean aphid counts did not differ between MicroAC and the check. Despite differences in post-spray numbers of soybean aphid, yield did not differ among treatments, perhaps due to ample rainfall that supported relatively high soybean productivity in the plots.

Technical Abstract: Soybean aphid (SA) infestations can reduce the yield of soybeans, and thus the efficacy of new spray treatments should be evaluated for control of this pest. Two foliar insecticides were tested against SA in small plots of soybeans near Brookings, South Dakota in 2005. Post-treatment counts showed that Asana XLTM, a conventional chemical insecticide, reduced the number of SA per plant compared to MicroACTM, an entomopathogenic fungal formulation, and the distilled water check. SA counts did not differ between MicroAC and the check. Despite differences in post-spray numbers of SA, yield did not differ among treatments, perhaps due to ample rainfall that supported a relatively high yield of soybeans.