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Some Complementary Approaches to Control Aphids and Whitefly in Cotton Fields
with Conservation on Their Associated Controlling Predators
- Shaheen*, F.A.H Said*, A. A. A. ;. ; Hamid**, A.M. And Ei¬zahi**, S.E.
- * Fac. Agric. Mansoura Univ.
- ** plant Prot. Res. Inst. Dokki, Cairo
- The Third International Conference onIPM Role in Integrated Crop management and Impacts on Environment and Agricultural Products. 26-29 November 2005, Giza, Egypt.
Abstract
Laboratory, semi-field and field studies were carried out at Sakha Research station, Kafr El-Sheikh Governorate, Egypt during 2003 and 2004 cotton seasons to evaluate the potency of some control approaches to face the menace of aphids and whitefly to cotton plantations. Under laboratory conditions, by using residual film technique, KZ oil proved to be the most harmless against Chrysoperla carnea larvae. Also, Vertimec, Actara and Confidor were categorized harmless. Teliton and Icon were harmful. Under field-cages conditions, the economic decision levels were estimated. The economic threshold of aphids were determined to be 1.84 and 2.83 aphids / cotton leaf and 0.28 and 0.60 whitefly adults / cotton leaf in 2003 and 2004 seasons, respectively. While, the economic injury levels were 2.30 and 3.54 aphids / cotton leaf and were 0.36and 0.75 whitefly adults / cotton leaf in 2003 and 2004, resp.The results of field studies revealed that Actara and Confidor gave effective control against cotton aphids, and preserve associated predators. Therefore, Actara and Confidor could be used in integrated management of aphids and whitefly on cotton plantations.
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