Many workers have demonstrated that foliar-feeding insects can be controlled by applying systemic insecticides to the soil at planting. Absorbed by roots of the growing plants, systemics are translocated to foliage. A few of the more recent studies during the past decade are those of Beckham (1970), Gentry et al. (1970), Hagel (1970), Miller and Kring (1970), and Webb et al. (1970). Recently, much attention has heen directed toward controlling the greenbug, Schizaphis graminum (Rondani), on sorghum, Sorghum bicolor (L.) Moench, with systemic insecticides applied as in-furrow soil treatments at planting. Newly emerged sorghum plants are very vulnerable to greenbug attack and may be seriously damaged or killed. However, application of soil systemics may have a phytotoxic effect on plant emergence, resulting in thin stands and uneven plant growth. In general, emulsifiable concentrates appear to be considerably more phytotoxic than granular formations when applied with seed in the furrow.
Document Type: Research Article
Publication date: October 15, 1971
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