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Report - Alternatives to fenthion for quelea bird control
… resistant crops Bullard & Gebrekidan (1989) described how plant breeders can produce crop cultivars that have … However, unless the majority of farmers in an area plant resistant varieties the birds will simply move away … Spodoptera exempta populations in East Africa. Crop Protection 12: 91–103. Cheke, R. A., Venn, J. F. & Jones, P. …