| corn (Zea may L.) is the important food and feed crop in the world. Asian corn borer, Ostrinia furnacalis (Guenee), is the most important inset pest of corn in China. Fusarium spp. are among the most common fungus that causing corn ear rot, which are severe and result in losses in yield and grain quality. Ear feeding by Asian corn borer larvae may induce Fusarium infection on corn ear and kernel and increase the incidence of ear rot. Fusarium infection is often associated with severity of the accumulation of mycotoxins that have side effect on the human and animals health. In this study, the newly hatched Asian corn borer larvae, F. moniliforme and F. proliferatum were inoculated on the ear at the silking, bister and milk stages, respectively. Four type of corn i.e. field com, high oil corn, waxy corn and sweet corn were used in the experiments. The results are as follows:1. Asian corn borer damage to corn ear was significantly increasing the incidence of corn ear rot, and resulted in higher accumulation of mycotoxins in kernels.2. Asian corn borer damage to corn ear induced ear rot infections were varies when the larvae attacked corn ear at the different development stags. The silking infestation of Asian corn borer was resulted in the highest ear rot infection, then the bister stage. It hardly effect the ear rot infection when Asian corn borer attacked at milk stage of corn development. The production of mycotoxins were coincided with the disease infection of ear rot.3. The incidence of ear rot in spring-sown corn is significantly higher than that of summer-sown corn when infested the Asian corn borer.4. The incidence of corn ear rot was different between Langfang and Beijing, the former was significantly higher.5. When the ear rot was serious, the concentration of mycotoxins could be reduced by removing diseased kernels.
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