บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Potential of cloves (Syzygium aromaticum (L.)) Merr. and Perry as a grain protectant against Tribolium castaneum (Herbst) and Sitophilus zeamais Motsch.

Ho, S. H.; Cheng, L. P. L.; Tan, H. T. W.;

Postharvest Biology and Technology Year: 1994 Vol: 4 Issue: 1-2 Pages: 179-183 Ref: 10 ref.

1994

บทคัดย่อ

Potential of cloves (Syzygium aromaticum (L.)) Merr. and Perry as a grain protectant against Tribolium castaneum (Herbst) and Sitophilus zeamais Motsch.

ABSTRACT :

 

Flower buds of cloves (Syzygium aromaticum) were extracted with methanol or hexane. The methanol (polar) extracts were tested against adults of Tribolium castaneum and Sitophilus zeamais via topical application. The hexane (non-polar) extracts were tested against the 2 species by filter paper impregnation. No contact toxicity of polar extracts was observed for either species. However, 100 g/100 ml non-polar extracts caused 90% mortality in S. zeamais but had no effect on T. castaneum. Both polar and non-polar clove extracts were applied to milled rice which was then exposed to the 2 species separately in treated medium tests. The polar fractions had no effect on the mortality of either species. With the non-polar extracts mortalities of 13% and 44% in T. castaneum were obtained after 7- and 21-day exposure periods, resp. For S. zeamais mortalities of 43% and 53% were observed after 7 and 21 days of exposure, resp., to rice treated with the non-polar extracts. After removal of the treated adults

of both species at the end of the 7-day exposure period, the emergence of the F1 progeny was monitored. No progeny of T. castaneum and very few of S. zeamais emerged from the rice treated with non-polar extracts.