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Two field experiments were conducted at the Experimental Farm of ElKassasin Horticultural Research Station, Ismailia Governorate, Egypt during two successive early summer seasons of 2007 and 08 to study the response of local tomato hybrid (Rima Lady) F1 plants grown in sandy soil under drip irrigation system. Tomato plants were treated four times with antioxidants (salicylic acid, hydroquinone and thiourea), extracts of neem and jatropha plants and different combinations of such treatments as well as water spray (control) on growth, yield, chemical constituents and control of tomato whitefly were studied. The results indicated that vegetative growth, yield and its components, also chemical constituents were promoted with all spraying materials as compared to control. Spraying plants with plant extracts recorded the uppermost values of growth, pod quality, total yield and chemical constituents than antioxidants. In general, spraying plants with mixed plant extracts (neem or jatropha) and thiourea significantly increased vegetative growth, yield and its components and chemical constituents than sprayed by other combinations or alone as well as control. The binary mixture of thiourea plus neem and thiourea plus jatropha were showed very good initial and acceptable or good residual action till the end of season and were the most effective traditional insecticides tested against whitefly. The botanical aterial (jatropha extract) gave poor control against adult and nymphal stages of whitefly. Salysilic acid effect was came in the intermediate. On the other hand, data obvious synergism action between neem and salysilic acid. Results of these studies showed be useful in planning of future field trials to increase the effectiveness and to manage the rate of field applications.

journal of productivity and development/journal of productivitiy and development

EFFECT OF SPRAYING WITH SOME ANTIOXIDANTS AND PLANT EXTRACTS ON GROWTH TOMATO PLANTS AND ITS RELATION WITH CONTROL OF TOMATO WHITEFLY (BEMISIA TABACI GENN.)