EVALUATION OF CERTAIN INSECTICIDES AGAINST RICE STEM BORER, CHILO AGAMEMNON BELS. AND RICE LEAF MINER; HYDRELLIA PROSTERNALIS DEEM. IN RICE FIELDS

Document Type : Original Article

Authors

1 Plant Protection Research Institute, Agricultural Research Centre, Giza, Egypt

2 Central Agricultural Pesticides Laboratory, Agricultural Research Centre, Dokki, Egypt

Abstract

Different insecticides in certain doses and formulations were ap‌plied in different timings against the rice stem borer and the rice leaf miner. The obtained data can be summarized as follows : Rice stem borer : Most of the tested chemicals were highly effec‌tive on the borer. Percentages of damage in the treated plots were 2.9 and 3.8% for Fipronil (10 kg/fed), 14.2 and 12.3% for Diazinon (8 kg/ fed) in 1994 and 1995 seasons, respectively. Fipronil at the rate of 10 kg/fed followed by Furadan (6 kg/fed) and Novadrin (1.5 lit/fed) seemed to be the most effective insecticides. They reduced damage by 81.8, 78.1 and 51_3% in 1994, and 71.2, 69.7 and 56.8% in 1995 season, respectively. Applying insecticides at 50 or 70 days after transplanting was ef‌fective in reducing the damage, but at the later timing, insecticides were more effective. Rice leaf miner: Based on the percentage of the damaged leaf area parameter, Furadan at the rate of 6 kg/fed and Novadrin (1.5 Lit/ fed) were the most effective insecticides with the least damage (1.7 and 1.9% in 1994 and 1.6 and 1.7% in 1995), respectively. Dursban (4.5 kg/fed) and Sevin (16 kg/fed) showed intermediate effectiveness. Based on either infestation parameter or severity parameters, Fu‌radan (6 kg/fed) and Novadrin (1.5 lit/fed) were the most effective in‌secticides against the rice leaf miner.

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