RESIDUAL EFFECT OF SOME SYSTEMIC INSECTICIDES APPLIED AS SOIL TREATMENT AGAINST COTTON APH- IDS AND MITES

Document Type : Original Article

Authors

Central Agricultural pesticides Laboratory, Agricultural Research Centre, Dokki, Giza, Egypt

Abstract

Four granular insecticides namely Vydate, Temik, Nemacur and Furadan were applied on cotton at planting at the rates of 10, 7, 15 and 15 kg/f. Gawsho was mixed with cotton seeds at the rate of 7 glkg seeds before cultivation_ To evaluate the residual effect of the systemic insecticides against cotton aphids, Aphis gas-sypii Glover, and the mite , Tetranychus arabicus Atttiah, samples of cotton leaves were taken at random from each treatment after irrigation at the intervals 2 , 3 , 4 , 5 , 6 and 7 weeks. Results clearly showed that Temik was the most effective granu‌lar insecticide against aphids. It has a long residual effect uptil week 7 after treatment. Furadan produced a similar patttern but to a lesser ex‌tent. Gawsho exhibited moderate but stable toxicity during the fist 5 weeks . Vydate and Nemacur showed low toxicity along the exprimental period. Data also indicated that the tested insecticides were ineffectice against the mites T. arabicus Attiah except Temik which showed high and moderate toxicity at weeks 2 and 4, respectively.

Files

Share

How to cite

Statistics