บทคัดย่องานวิจัย

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Efficacy of Xylocoris flavipes (Reuter) (Het., Anthocoridae) to suppress Prostephanus truncatus (Horn) (Col., Bostrichidae) in traditional maize stores in southern Togo.

Helbig, J.;

Journal of Applied Entomology Year: 1999 Vol: 123 Issue: 8 Pages: 503-508 Ref: 27 ref.

1999

บทคัดย่อ

Efficacy of Xylocoris flavipes (Reuter) (Het., Anthocoridae) to suppress Prostephanus truncatus (Horn) (Col., Bostrichidae) in traditional maize stores in southern Togo.

In the course of three storage periods (1988-90) predatory insects that occur in traditional maize stores in southern Togo were observed and their relationship to the introduced pest Prostephanus truncatus was investigated. Xylocoris flavipes, a predator on a wide range of postharvest pests, was the only one observed regularly and in higher numbers. Laboratory trials with P. truncatus showed that larvae were preyed on and no preference for any one of the three instars was detected. On average, 7.3 pest larvae were killed by larvae or adults of the predator. In glass jar trials on loose maize, X. flavipes reduced the numbers of P. truncatus by 57.6% after 8 weeks. Losses and damage were reduced by 50 and 17.6%, respectively. Observations in traditional maize stores indicated a tendency to decreasing populations of X. flavipes when populations of P. truncatus increased, presumably due to the unfavourable environmental conditions created by the pest. Therefore, it is concluded that X. flavipes does

 not play an important role in the control of this pest.