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Journal of Entomology
  Year: 2013 | Volume: 10 | Issue: 2 | Page No.: 103-109
DOI: 10.3923/je.2013.103.109
 
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Management of Maliarpha separatella Rag Using Effective Entomopathogenic Nematodes and Resistant Rice Cultivars

V.M. Kega, M. Kasina, F. Olubayo and J.H. Nderitu

Abstract:
Current pest control methods rely on a pesticide dominated paradigm and there is need to adopt a more ecological approach based on renewable technologies such as host plant resistance and natural biological control, which are available even to resource poor farmers. Resistant cultivars complement natural enemy action in lowering pest infestation while intrinsic rate of increase of pest species on resistant varieties is lower. An experiment whose aim, was to test whether the African white rice stem borer (Maliarpha separatella), can be managed by use of resistant rice varieties in combination with entomopathogenic nematodes was set up at Kenya Agricultural Research Institute, Mwea. The study was arranged as a 4x4 factorial design and each treatment replicated three times. First factor was rice cultivars at four levels, resistant cultivar (M27615), second resistant cultivar (M27628), the highly susceptible but tolerant cultivar (M27608) and commercial check Basmati 370 variety, which were planted in 1x1m experimental plots. Second factor was application of EPN (Hetrerorhabitidis indica) as a suspension in distilled water to the cultivars at four different times after they were transplanted (no application, 3 weeks after transplant date (WAT), 5 WAT and 6 WAT. Results showed that M. separatella infestation was lowest on cultivar M27615 where H. indica was applied at 3 WAT, while cultivar M27608 had the highest yield despite high number of white heads and stem tunneling indicative of high levels of M. separatella infestation. The findings showed that host-plant resistance and EPNs can be integrated to manage M. separatella infestation (250 words).
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How to cite this article:

V.M. Kega, M. Kasina, F. Olubayo and J.H. Nderitu, 2013. Management of Maliarpha separatella Rag Using Effective Entomopathogenic Nematodes and Resistant Rice Cultivars. Journal of Entomology, 10: 103-109.

DOI: 10.3923/je.2013.103.109

URL: https://scialert.net/abstract/?doi=je.2013.103.109

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