Release of the predator Phytoseiulus macropius (Banks) on kidney bean plants to control Tetranychus urticaekoch in different seasons (Acari: Phytoseiidae & Tetranychidae) in Egypt [electronic resource].

Includes references.

The predator mite Phytoseiulus macropllis (Banks) was released on kidney bean plants to control the two-spotted spider mite, Teranychus urticae Koch in different seasons under a screen house at Dokki district (Giza Governorate). Winter season proved to be the best for predator release at the rate of 9, 6 and 3 individuals/2plants. The red spider mite population was greatly reduced. Its percentage reduction at the first post- count (after 2 weeks) was 100, 81 and 78% at the release levels 9, 6 and 3 predators/2 plants , recteptively. This might be attributed to the low spider mite population, due to unfavorable low temperature, which allowed the predator to suppress the pest population. Spring and autumn seasons were also suitable for increasing and flourishing this predator species. Which resulted in controlling the red spider mite population specially at the high release level of 9 & 6 individuals/2 bean plants. On the oppositel high temperature during summer months stimulated spider mites population to rapidly increase causing severe deterioration to the bean the plants before giving chance to predator individuals to control the mite pest. On the other hand, this high temperature and the occurrence of hot spells during summer had certainly a negative effect on the predator activity.

Summary in Arabic.

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