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Influence of tillage practices and row spacing on soybean insect populations in Louisiana
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Insects were monitored by the sweep-net method for 2 years in conventionally tilled and no-till soybeans planted in narrow and wide row spacings to determine the effects on soybean insect populations. Season-long differences in population densities due to the influences of tillage practices were detected for several species at each of three locations. However, the banded cucumber bettle, Diabrotica balteata (LeConte), was the only species whose populations showed a consistent response at each location. Differential emergence of teneral adults of the banded cucumber beetle and bean leaf beetle, Cerotoma trifurcata (Forster), between conventional tillage and no-till culture at one location indicated an ovipositional preference for the tilled soybeans or a higher egg/larval mortality in the no-till soybeans. A leafhopper, Scaphytopius acutus (Say), an important vector implicated in the transmission of two soybean diseases in Louisiana, increased on the narrower row spacing. [AS/SS]
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 Record created 1985-05-31, last modified 2019-03-04

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