Determination of effective and economic dose of two carbamate insecticides against cotton whitefly Bemisia tabaci (Genn.) on Niab karisham cotton at Faisalabad (Pakistan)
2000
Afzal, M. | Farooq, M. | Razaq, M. (University of Agriculture, Faisalabad (Pakistan). Dept. of Agricultural Entomology) | Ayub, S.
Comparative efficacy of 3 different doses of two carbonates viz., Lannate 40SP (mothomyl) 400, 500 and 600 gm/acre and Larvin 80 DF (thiodicarb) @ 200, 300 and 400 gm/acre was sorted out against cotton whitefly Bemisia tabaci (Genn) on NIAB. Karishma cotton at Faisalabad. All the doses of both insecticides failed to keep the population of the pest below economic threshold level (4-5/leaf). Population of the whitefly after 3 sprays due to different doses of Lannate 40SP and Larrin 8OF was 6.77, 6.04, 4.98 and 7.87 and 7.87, 8.131, 6.07 per leaf respectively as compared with control (10.51 per leaf). Lannate 40SP provided better control of whitefly, maximum population decrease was observed due to highest dose (600 gm/acre). However, population reduction due to both of the insecticides did not differ significantly.
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