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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Date
2006Author
Yobera, D
Obudho, E.
Waturu, C.
Olubayo, F.
Nyamasyo, P.
Nderitu, J.
Kasina, J
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
A field experiment was conducted to track the daily population trends and
occurrence of the flower thrips Megalurothrips sjostedti Trybom and Frankliniella occidenialis
(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 t.-cyhalothrin (Karate 1.75% EC), were evaluated for their effects on
the abundance of flower thrips, throughout the day, at l-h intervals. The average
population peak of thrips was found to occur at around 1300h, 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.
Citation
International Journal of Tropical Insect Science Vol. 26, No.1, pp. 2-7, 2006Publisher
ICIPE Department of Plant Science and Crop Protection, University of Nairobi, Department of Zoology, University of Nairobi, Kenya Agricultural Research Institute, National Fibre Research Centre,