Abstract
A rich insect fauna inhabits the soil in soybean agroecosystems. The influence of tillage practices on seedcorn maggot populations was evaluated in several studies involving soybean. Changes in soil parameters that influence insect biology and life history in the soil environment directly or indirectly result from the extent and type of tillage. In soybean agroecosystems, arthropod predators play an important role in the population dynamics of soybean pests. From an integrated pest management viewpoint, the effects of tillage, manifested through changes in residue cover and abiotic soil parameters, may play an important role in the management of pest species through their influence on other biotic components in the agroecosystem. In the USA, the lesser cornstalk borer is an occasional pest of soybean in southern latitudes, where outbreaks typically occur during periods of hot, dry weather. Major components of the predator complex are the carabid beetles and predaceous spiders that inhabit the soil surface.
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