摘要： Eight wild rice entries related to six species, including E6-1 and E6-3/6-4 (different ecotypes of [i]Oryza grandiglumis[/i]); E7-4 ([i]O. granulata[/i]), E9-10 and E9-20(different ecotypes of [i]O. latifolia[/i]), E13-13 ([i]O. minuta[/i]) , E15-13 ([i]O. officinalis[/i]) and E16-3 ([i]O.[/i] [i]punctata[/i]), were used in experiment for the investigation of their anti-feedant effect on Spodoptera litura. The rice leaf extracts were prepared with methanol by Sohxlet method. The extract rates of the six species of wild rice were between 8.50% and 24.86%. Selective anti-feedant activity and non-selective anti-feedant activity of the extracts from the six species of wild rice against the 3rd instar larvae of [i]S. litura[/i] showed that the extract of the wild rice E6-1 of [i]O.[/i] [i]grandiglumis[/i] had stronger anti-feedant activity than the others. The concentration for 50% anti-feedant activity (AFC[sub]50[/sub]) of the wild rice E6-1 extract against the 2nd instar larvae of [i]S. litura[/i] was 120 mg/mL in 24 h and 50 mg/mL in 48 h after treatment.

关键词: wild rice, extract, Spodoptera litura, anti-feedant activity, germplasm resource