Enhancing the potency of vegetable oils by combining with pirimiphos-methyl for protection of stored cowpea against infestation by Callosobruchus maculatus (Fab.)

• DOI: 10.4314/sinet.v23i2.18170
• Publication Date: 2011-11-30T03:30:15Z
• Authors: D. Obeng-Ofori; S. Amiteye
• Keywords: Callosobruchus maculatus; Dose

The cowpea beetle Callosobruchus maculatus (Fab.) is a major insect pest of stored in Ghana. efficacy coconut, groundnut and soybean oils applied at 1, 2, 5 10 ml kg-1 pirimiphos-methyl 2.5, 5.0 active ingredient 2 water grain (1/16, 1/8 1/4 the recommended dose) alone or combination to adults immature stages C. persistence treatments were evaluated laboratory. All caused significant mortality compared untreated controls. Lower dosages when combined highly toxic maculatus. mixtures also completely inhibited development beetle. Only remained effective 60 days after application. Pirimiphos-methyl can be used reduced rates if with lower vegetable control infestation cowpea. SINET: Ethiopian Journal Science Vol. 23, No. (December 2000), pp. 263-272 Key words/phrases: maculatus, cowpea, mortality, pirimiphos-methyl, potency