The role of DIMBOA on the feeding of Asian corn borer, Ostrinia furnacalis (Guenée) (Lep., Pyralidae)

The role of 2,4-dihydroxy-7-methoxy-(2H)-1,4-benzoxazin-3(4H)-one (DIMBOA), on feeding of Asian corn borer (ACB), Ostrinia furnacalis (Guenée), was observed and quantified. DIMBOA had an antifeedant effect on ACB and a mathematical model was built for the correlation between DIMBOA concentration and antifeedant index. DIMBOA increased the time that the larvae required to reach the pupal stage and the larval weights in treatment were significantly less than those in control. The number of entrances of ACB on the plant sites were positively correlative to the DIMBOA concentrations, suggesting that feeding stimulants in the corn plants could probably override the antifeedant effect of DIMBOA