Evaluation The Effect Of Two Plants Cowpea And Okra As Plant Traps For Some Cotton Pests

	Evaluation The Effect Of Two Plants Cowpea And Okra As Plant Traps For Some Cotton Pests
journal of kerbala university
Article 1, Volume 7, Issue 3, 2011, Pages 793-798 PDF (0 K)
Abstract
The present study was conducted to evaluate the role of cowpea Vigna unguiculata (L.) Walp. and okra Abelmoschus esculentus (L.) Moench as plant traps on some cotton pests. Three treatments were used: the first treatment which included eight lines cotton Gossypium hirsutum L. with four lines cowpea (as plant traps) on both sides; The second treatment which included eight lines cotton with four lines okra (as plant traps) on both sides; and the third treatment which included eight lines cotton as control (check). The results showed significant difference of the infestation percentage of the beet army worm Spodoptera exigua Hbn., This pest and the spiny bollworm Earias insulana Boisd. Showed more preference to the okra plants. The infestation percentage increased to 83.3% and the larva number was increased and reached 11.6 larvae/ plant. But in the cotton plants of the first treatment, the infestation percentage of the first insect decreased, with an average of 29.53% and also the larva number of the second insect, and reached one larva/plant. In addition to this, the cowpea plants showed no infestation by the spiny bollworm. Furthermore, the results asserted declared that strawberry spider mite Tetranychus turkestani (Ugarov&Nikolski) and the cotton thrips Thrips tabaci Lind. Showed more preference to the cowpea which reached 35.3 and 22.6 individual/plant, respectively. while the okra plants showed no infestation by the strawberry spider mite. Moreover, the cotton with four lines okra and cotton plants in control, showed more preference to cotton white fly Bemisia tabaci Gennas; it reached 25.3, 24.3 individual/plant, respectively. Results also indicated that the effect of spray plant traps (cowpea and okra) in the first and second treatments, respectively with the mixture of IGR Match and Polo insecticide on cotton yield, showed that the cotton plants in the first treatment gave the highest yield in the first and second picking with an average of 812.48, 809.5 Kg/Donem, respectively, as compared to control, which gave a low yield with an average of 681.45 Kg/Donem.

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