Suppressing infestation of stored pearl millet Pennisetum glaucum (L.) R.Br. by Tribolium castaneum (Herbst) with insecticidal essential oils inMaiduguri, Nigeria

摘要

The insecticidal, larvicidal and antibiotic effects of three essential oils obtained from clove (Syzgium aromaticum (L.) Merr. er L. M. Perry), West African black pepper (WABP) (Piper guineense Schumach. er Thonn.) and ginger (Zingiber officinale Rosc.) were evaluated against the rust-red flour beetle, Tribolium castaneum (Hbst.), infesting stored pearl miller in Maiduguri, Nigeria. Clove or WABP oil was significantly more toxic to adults and larvae of T: castaneum than ginger oil. At the dosage of 100 mg/5 g seed, clove, WABP and ginger oils caused 96.3, 100 and 13.2 % adult mortalities, respectively, and 65.7, 83.4 and 9.6 % larval mortalities, respectively. Application of-clove or WABP oil at the rare of 80 mg/5 g seed completely suppressed the development of T. castaneum adults and larvae in miller grains.