MOI-201 is a new bioinsecticide based on an extract of Chinese medicinal plants. This product containing oxymatrine as an active compound is highly effective against chewing and sucking insects such as armyworm (Pseudaletia unipuncta) and thrips (Frankliniella occidentalis). Mode of action studies on armyworm have indicated that MOI-201 works both on contact and by feeding. The rate of kill seems to be similar by both feeding and contact, with 95% mortality after 24 h of feeding compared with 97% by contact exposure to a 500-fold dilution of MOI-201. Other efficacy studies conducted with Heliothis virescent (Tobacco budworm) and Diabrotica virgifera (Corn rootworm beetle) showed mortality rates of 100% and 86%, respectively, after 48 h of exposure. Also, in a laboratory study on Frankliniella occidentalis (Western flower thrips), 94 % of insects died within 7 days of the treatment with MOI-201. Results from studies on Tetranychus urticae (Two-spotted spidermite), Bemisia argentifolii (Silverleaf whitefly), and Blatella germanica (Cockroach) indicate that insect pest populations can be effectively controlled by this new, promising biopesticide. In all studies, no phytotoxicity on plants was observed when the product was applied at the recommended dilution rate of 1:500 to 1:800.
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