EFFICACY OF SOME SYSTEMIC GRANULAR INSECTICIDES IN CONTROLLING YELLOW RICE BORER, TRYPORYZA INCERTULAS (WLK.) AND RICE LEAF ROLLER, CNAPHALOCROCIS MEDINALIS (GN.) AND THEIR EFFECTS ON PADDY CROP
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Date
1986
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AAU, Anand
Abstract
The experiments were conducted in three cropping seasons during 1982 and 1983 for testing the efficacy of some systematic granular insecticides in controlling yellow rice borer, Tryporyza incertulas (Wlk.) and rice leaf roller, Cnaphalocrocis medinalis (Cn.) and the effects of these insecticides on the paddy crop. The treatments tried in experiment were carbofuran (@0.5 kg a.I./ha), carbofuran (@ 1.0 kg a.I./ha), phorate (@ 0.5 kg a.I./ha), phorate (@ 1.0 kg a.I./ha), endosulfan (@ 0.5 kg a.1./ha) endosulfan (@1.0 kg a.1./ha), Sevidol(@ 0.5 kg a.I./ha), Sevidol (@1.0 kg a.I./ha), quinalphos (@ 1.0 kg a.I./ha) and control (no insecticide). Granules were applied in 1 to 3 cm deep standing water at 25 and 50 days after transplanting. Among the insecticidal treatments carbofuran 1.0 kg a.I./ha was the best and significantly superior to all other insecticidal treatments for the control of yellow rice borer. This treatment was also the most effective treatment against rice leaf roller.
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AGRICULTURAL ENTOMOLOGY, AGRICULTURE, A STUDY