Journal of Entomology (2007) 4, 469-473

J.H. Nderitu, E.M. Wambua, F. Olubayo, J.M. Kasina and C.N. Waturu (2007)
Management of thrips (Thysanoptera: Thripidae) infestation on French beans (Phaseolus vulgaris L.) in Kenya by combination of insecticides and varietal resistance
Journal of Entomology 4 (6), 469-473
Abstract: A field study was conducted in 2002 to evaluate the combined effectiveness of insecticides and varietal resistance in the control of thrips infestation and damage at Kabete, Central Kenya. Four test varieties (Amy, Monel, Samantha and Impala) of French beans (Phaseolus vulgaris L.) and four insecticides (Lambda-cyhalothrin (Karate 1.75 EC), Petroleum spray oil (DC Tron 500 ML), Spinosad (Tracer 480 SC) and Fipronil (Regent 50 SC)) were used. The experiment was set in a split plot design, with variety forming the main plot and insecticide the subplot. Results show both varieties and insecticides influenced thrips infestation independently. For example, Tracer 480 SC and Regent 50 SC sprayed plots had the lowest thrips numbers across all varieties. Individual thrips species infestation differed across the treatments. For example, the mean number of Frankliniella occidentalis (Pergande) in Karate 1.75 EC sprayed plots was higher and significant compared to plots sprayed with Tracer 480 SC and Regent 50 SC but mean number of Megalurothrips sjostedti Trybom was not significantly different in all plots except those sprayed with DC Tron 500 ML and the control (unsprayed) plots. The research concludes by discussing the implications and applicability of the findings in French bean IPM systems in Kenya.
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Database assignments for author(s): John H. Nderitu

Research topic(s) for pests/diseases/weeds:
control - general
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Frankliniella occidentalis	Beans (Phaseolus)	Kenya
	Megalurothrips sjostedti	Beans (Phaseolus)	Kenya