Insecticidal effects of powdered parts of eight nigerian plant species against maize weevil sitophilus zeamais motschulsky (Coleoptera: Curculionidae)

Publication Type

Journal Article

Journal Name

Electronic Journal of Environmental, Agricultural and Food Chemistry

Publication Date

12-1-2007

Abstract

Powders prepared from parts of 8 different plant species indigenous to Nigeria were tested under laboratory conditions at 30 °C, 65% r.h and 12h: 12h light: dark regimes for their insecticidal activity against Sitophilus zeamais Motschulsky (Maize weevil). Results show that at 2% concentration, the eight plant powders increased mortality and reduced adult emergence of the weevils. The powders of Piper guineense and Capsicum frutescens had the highest percentage mortality (79.8 and 75.1) respectively, when compared with the other treatments. Adult emergence was least (6.00) in maize seeds treated with P. guineense. The powders significantly (P> 0.05) reduced adult emergence, grain damage and weight loss in the various treatments. The results provide a scientific rationale for the use of the plants in post-harvest protection.

Keywords

Adult emergence, Damage, Mortality, Plant powders, Sitophilus zeamais, Weight loss

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