الفهرس 
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Abstract
The objective of the present study is to throw some light on frequency occurrence of the two- spotted red spider mite Tetranychus urticae Koch and predatory mites on seven important leguminous crops commonly grown in Sharkia governorate, Egypt (common bean, cowpea, faba bean, lupine, pea, peanut; soybean) together with some biological data of T.urticae when reared on the investigated crop leaves under laboratory conditions. Also, daily prey consumption of the most common predacious mite species Typhlodromips capsicum when fed on different developmental stages of the two-spotted red spider mite T.urticae on three leguminous plant leaves was discussed. Obtained results indicated that, the highest frequency occurrence of T.urticae was recorded on soybean (87.96%) followed descendingly by common bean (84.26%), cow pea (71.29%), lupine (70.45%); faba bean (57.82%); pea (50.8%) and peanut (46%). Temperature and host plant species are of the factors affecting populations of that pest on these crops. Phytoseiid mite species formed the majority of predatory mites on common bean and soybean plants. The phytoseiid species T.capsicum proved to be the most dominant predacious mite on the investigated crops. Adult females of this predatory mite T.capsicum are able to attack different developmental stages of T.urticae successfully under laboratory conditions. Therefore, this species was expected to be as effective predator for suppressing the two-spotted red spider mite T.urticae populations in the investigated legume crop fields.