Bionomics and importance of two species ofChaetocnema in rice yellow mottle virus transmission in lowland rice in Tanzania |
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| Authors: | O O Banwo R H Makundi R S Abdallah J C Mbapila F M Kimmins |
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| Institution: | (1) Sokoine University of Agriculture, Morogoro, Tanzania;(2) Tropical Pesticides Research Institute, Arusha, Tanzania;(3) Agricultural Training & Research Institute, Ifakara, Tanzania;(4) Natural Resources Institute, ME4 4TB Chatham, Kent, UK |
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| Abstract: | Regular samplings were done of two important vectors in farmers’ fields during the 1999/2000 and 2000/01 rice seasons at crop
stages susceptible to rice yellow mottle virus (RYMV) on a traditional rice variety (‘Supa’) under rainfed lowland conditions
to provide information on the bionomics and importance of these vectors in the disease transmission. The population ofChaetocnema sp. (nr.varicornis Jacoby) (Coleoptera: Chrysomelidae) was significantly higher in hotspot than non-hotspot areas. However, there was no significant
difference in theC. pulla Chapuis population between these two areas. In general, theChaetocnema sp. population was higher than that ofC. pulla, and both vectors reached the peak of their population at 63 days after planting. Early planting in the hotspot areas is
suggested as a disease management strategy. Both vectors are naturally infective andChaetocnema sp. proved more efficient thanC. pulla in the transmission of RYMV. |
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| Keywords: | Bionomics Chaetocnema sp Chaetocnema pulla Epidemiology hotspot vectors non-hotspot rice yellow mottle virus lowland rice |
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