Field Studies on the Chemical Control of the Stem Borer Chilo partellus1> on Hybrid Sorghum in India2

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In field experiments at the Indian Agricultural Research Institute, New Delhi, during 1963 and 1964, 4 weekly applications of the following insecticides at compa- rable low and high rates of active ingredients in spray and granular formulations were effective for control of Chilo partellus (Swinhoe) (= zonellus Swinhoe) on hy- brid grain sorghum: carbaryl (1.0 and 1.5 kg/ha) , endrin (0.2, 0.3 kg/ha), lindane (0.13, 0.20 kg/ha), and benzene hexachloride (1.0, 1.5 kg/ha). Grain yields (kg/ha) in treated plots ranged from 1005 to 1624 and from 3083 to 4212, compared with 199 and 336 in the untreated controls. There was no significant difference in efficacy be- tween the granular and spray formulations, and the high rates of these formulations were not consistently superior to low rates in increasing yields.

In a 2nd experiment, to determine the effect of increasing numbers of weekly applications of endrin granules (0.2 kg/hectare), 4 and 5 applications were superior to 2 and 3 applications in reducing borer damage and increasing yields.

In a 3rd trial, to compare imported and locally produced granular formulations of insecticides, 4 weekly applications of imported 2% endrin granules, 2% endrin granules supplied locally (0.2 kg/hectare), and experimental 10% dimethoate granules formulated locally (1.0 kg/hectare) effectively reduced borer damage and in- creased yields, while experimental local formulations of 2% endrin granules on coconut shell and on clay were less effective.

The grain yield increases resulting from borer control with the more effective insecticides in these trials have demonstrated that chemical control of C. partellus on hybrid sorghum is necessary for maximum production of grain and is also economically feasible.

Document Type: Research Article

Publication date: April 1, 1969

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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