We examined the insecticidal effect of three different dust formulations, which were attapulgite (W), mix with oregano essential oil 52% carvacrol (D1), and 75% (D2), in four major stored-product beetle species, Sitophilus oryzae (L.), Tribolium confusum Jacquelin du Val, Rhyzopertha dominica (F.), Trogoderma granarium Everts. was most susceptible at all followed by T. R. dominica. In contrast,...

The effect of short exposures to spinosad-treated wheat, Triticum aestivum L., or maize, Zea mays L., was evaluated against adults of four stored-product insect species: lesser grain borer, Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae); rice weevil, Sitophilus oryzae (L.) (Coleoptera: Curculionidae); red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae); and the psoc...

Field studies were conducted from July 2002 to January 2003 for evaluating the effects of controlled aeration and a commercial biological insecticide, spinosad, in suppressing insect populations in stored wheat. Six cylindrical steel bins were filled with newly harvested (2002 crop year) hard red winter wheat on 9 and 10 July 2002. Each bin contained 30.7 metric tons (1,100 bu) of wheat. Wheat ...

The insecticidal activities of extracts from 22 Malaysian medicinal plant 8 botanical families were tested against rice weevil: Sitophilus oryzae (L.) and lesser grain borer: Rhyzopertha dominica (F.). obtained using hexane, methanol, dichloromethane to extract potential biopesticides dried leaves. toxicity levels examined periodically based on antifeedant activity contact assays treated assay....

In the current study, the stem wood of Millettia ovalifolia was evaluated for antifungal, insecticidal and phytotoxic activities. The results revealed that all the fractions showed no antibacterial activity against the tested bacterial strains. In case of antifungal activity, only ethyl acetate (EA) and chloroform (C) fractions exhibited minimum inhibitory concentration both at 500 μg/ml agains...

The functional response of Theocolax elegans (Westwood) parasitizing the lesser grain borer, Rhyzopertha dominica (F.) was examined over a range of temperatures. A type II functional response equation was fitted to each temperature regime. The parasitization rate was highest at 301C (20 hosts per day) and was lowest at 201C (2 hosts per day). Handling time was inversely proportional to temperat...

Fractions obtained from partitioning of aerial methanolic extract of Euphorbia Aelleniiwith chloroform (E2), ethyl acetate (E3), n-butanol (E4) and water (E5) were investigated in vitro for their phytotoxicity, insecticidal, anti-leishmanial, cytotoxicity, antibacterial and antifungal activities. Sample E2 appeared to have significant phytotoxic activity. In the insecticidal screening study onl...

High levels of inheritable resistance to phosphine in Rhyzopertha dominica have recently been detected in Australia and in an effort to isolate the genes responsible for resistance we have used random amplified DNA fingerprinting (RAF) to produce a genetic linkage map of R. dominica. The map consists of 94 dominant DNA markers with an average distance between markers of 4.6 cM and defines nine ...