抄録
Fthalide (4, 5, 6, 7-tetrachlorophthalide) has an inhibitory effect on infection process of rice blast fungus, Pyricularia oryzae. The formation of penetration pegs of appressoria was investigated by scanning electron microscopy. The conidia, treated with 2μg/ml of fthalide, were inoculated on rice leaf sheaths and formed appressoria. However, the formation of penetration pegs were not observed at the bases of appressoria.
