Release of two predators and two parasitoids to control aphids and whiteflies |
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| Authors: | F N Zaki M F El-Shaarawy N A Farag |
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| Institution: | 1. Plant Protection Dept., National Research Centre, EL-Tahrir St., Code 12622, Dokki, Cairo, Egypt
2. Entomology Dept., Faculty of Agriculture, Ain Shams University, Cairo
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| Abstract: | The potential of the two predators,Chrysoperla carnea Steph. andCoccinella undecimpunctata Reich., as well as the two parasitoidsDiaeretiella rapae andEretmocerus mundus in an open field and under green house were conducted after several releases againstAphis gossypii, A. fabae, Brevicorine brassicae andBemisia tabaci. Double releases ofC. carnea (1∶5 predator∶aphids) achieved 100% reduction inA. gossypii after 12 days. A single release ofC. undecimpunctata (1∶50 predator∶aphids) resulted in 99.97% reduction in the same aphid. Releasing ofD. rapae to controlB. brassicae at the rate of 1∶50 resulted in 29% parasitism. ReleasingE. mundus for the control ofB. tabaci in cabbage at the rate of 5 adults/m2 resulted in 32% parasitism. Three releases ofC. undecimpunctata adults in a greenhouse cultivated with soybean, decreasedA. fabae population from 207 to 7.6 aphids/plant. |
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