研究了宁虫素对水稻螟虫的毒力及防治效果。
Toxicities and control effects of Ningchongsu against rice stem borers were tested.
另一方面力求改进栽培技术、调节水稻生育期，恶化螟虫的生活条件，避免或减轻螟害。
Moreover, it is important also to improve cultural practices, regulate the growth stage of rice and deteriorate the living conditions of the paddy borer in order to avoid or reduce borer injury.
稻瘟病和螟虫等病虫害严重危害着水稻生产，导致水稻产量下降，稻米品质变劣。
Rice blast and stem borers have done harm to rice production, led to decreased rice yield and inferior grain quality.
稻瘟病和螟虫等病虫害严重危害着水稻生产，导致水稻产量下降，稻米品质变劣。
Rice blast and stem borers have done harm to rice production, led to decreased rice yield and inferior grain quality.
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