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Diurnal population trends of Megalurothrips sjostedti and Frankliniella occidentalis (Thysanoptera: Thripidae) and their natural enemies on French bean Phaseolus vulgaris (Fabaceae)

Published online by Cambridge University Press:  28 February 2007

J. Kasina
Affiliation:
Department of Plant Science and Crop Protection, University of Nairobi, PO Box 30197, Nairobi, Kenya
J. Nderitu
Affiliation:
Department of Plant Science and Crop Protection, University of Nairobi, PO Box 30197, Nairobi, Kenya
G. Nyamasyo
Affiliation:
Department of Zoology, University of Nairobi, PO Box 30197, Nairobi, Kenya
F. Olubayo
Affiliation:
Department of Plant Science and Crop Protection, University of Nairobi, PO Box 30197, Nairobi, Kenya
C. Waturu
Affiliation:
Kenya Agricultural Research Institute, National Fibre Research Centre, PO Box 298, Kerugoya, Kenya
E. Obudho
Affiliation:
Department of Plant Science and Crop Protection, University of Nairobi, PO Box 30197, Nairobi, Kenya
D. Yobera*
Affiliation:
Department of Plant Science and Crop Protection, University of Nairobi, PO Box 30197, Nairobi, Kenya
*
Author deceased

Abstract

A field experiment was conducted to track the daily population trends and occurrence of the flower thrips Megalurothrips sjostedti Trybom and Frankliniella occidentalis (Pergande), and their indigenous natural enemies Orius spp. and Ceranisus menes (Walker), infesting French beans. French beans in monocrop or interplanted with six companion crops (Zea mays L., Coriandrum sativum L., Tagetes erecta L., Brassica oleracea var. acephala L., Daucus carota L. and Capsicum annuum L.), and two chemical insecticides, methiocarb (Mesurol 500SC) and L-cyhalothrin (Karate 1.75% EC), were evaluated for their effects on the abundance of flower thrips, throughout the day, at 1-h intervals. The average population peak of thrips was found to occur at around 1300 h, but each species had different peak periods. Adult F. occidentalis populations peaked at midday and adult M. sjostedti populations at 1500 h, while the larvae of the two thrips species peaked at around 1300 h. Orius spp. were the most abundant natural enemies and their populations peaked at around 1400 h. Ceranisus menes population also peaked at around 1400 h.

Type
Research Article
Copyright
Copyright © ICIPE 2006

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References

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Diurnal population trends of Megalurothrips sjostedti and Frankliniella occidentalis (Thysanoptera: Thripidae) and their natural enemies on French bean Phaseolus vulgaris (Fabaceae)
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Diurnal population trends of Megalurothrips sjostedti and Frankliniella occidentalis (Thysanoptera: Thripidae) and their natural enemies on French bean Phaseolus vulgaris (Fabaceae)
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Diurnal population trends of Megalurothrips sjostedti and Frankliniella occidentalis (Thysanoptera: Thripidae) and their natural enemies on French bean Phaseolus vulgaris (Fabaceae)
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