Short range dispersal of western flower thrips in field-grown French beans in Kenya

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Nyasani, J.O.; Subramanian, S.; Orindi, B.; Poehling, H.-M.; Meyhöfer, R.: Short range dispersal of western flower thrips in field-grown French beans in Kenya. In: International Journal of Tropical Insect Science 37 (2017), Nr. 2, S. 79-88. DOI: https://doi.org/10.1017/S1742758417000054

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Sum total of downloads: 144




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Abstract: 
The short-range diurnal dispersal pattern of adult western flower thrips Frankliniella occidentalis (Pergande), in relation to spatial distribution of French beans, was determined in the field. A total of 1200 adult female F. occidentalis were released on 60 French bean plants with 20 adult thrips per plant at the central release point of 3.14 m2. Dispersal was determined in terms of the number of thrips recorded on French beans planted on concentric circles at 0.9, 1.8, 3.6, 7.2 and 14.4 m radii from a circular central release point for five days. Results indicated that there was a steady increase in the proportion of dispersing adult F. occidentalis from the first to the fourth day in the first planting season, and from the first to the third day in the second planting season. The peak hour for dispersal was 10.15 h in the first season while it was 13.15 h in the second season. Temperature and wind speed were positively associated with the dispersal activity of adult F. occidentalis. Minimal flight activity was at temperatures below 15 °C and peak flight activity was at 19 °C. The prevailing wind direction did not influence the dispersal pattern of adult F. occidentalis in both seasons. Adult F. occidentalis moved up to 7.2 m on French beans on the first day. In both seasons, the mean direction of thrips dispersal was mostly uniformly distributed (not oriented to a particular compass direction) around the central release point. The results provide an insight into developing integrated management strategies against the pest based on isolation of farm fields, management of alterative hosts around French bean fields and insecticide application. Copyright © icipe 2017
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. Dieser Beitrag ist aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2017
Appears in Collections:Naturwissenschaftliche Fakultät

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pos. country downloads
total perc.
1 image of flag of Germany Germany 74 51.39%
2 image of flag of United States United States 29 20.14%
3 image of flag of China China 7 4.86%
4 image of flag of Kenya Kenya 4 2.78%
5 image of flag of Argentina Argentina 3 2.08%
6 image of flag of Japan Japan 2 1.39%
7 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 2 1.39%
8 image of flag of Ireland Ireland 2 1.39%
9 image of flag of France France 2 1.39%
10 image of flag of Canada Canada 2 1.39%
    other countries 17 11.81%

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