Comparison among two acaricides and a predator for Tetranychus urticae (Acarina: Tetranychidae) control on beans, Phaseolus vulgaris
1992
Chahine, H. | Aslam, M. (American Univ. of Beirut (Lebanon)) | Michelakis, S.
Savonar at the rate of 10ml/500ml water, PentacR at the rate of 1.25ml/100ml water and a predator, Phytoseiulus persimilis, at 1:12 predator: prey ratio were evaluated to control Tetranychus urticae at an average population level of 47 to 65 mites per leaflet of beans, Phaseolus vulgaris, in a greenhouse. PentacR was more effective in reducing the mite population up to nine days of application followed by the predator and SavonaR treatments. Mite population started increasing after nine days and in a month the increase was 12 and 6 folds in SavonaR and PentacR treatments, respectively. The population only doubled in predator may provide effective control of the mite whereas, at least two pesticide applications will be required for effective pest management
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