榆林地区马铃薯二十八星瓢虫发生规律及防治指标初步研究榆林地區馬鈴藷二十八星瓢蟲髮生規律及防治指標初步研究 유임지구마령서이십팔성표충발생규률급방치지표초보연구 Preliminary Study on Occurring Regulation of Henosepilachna vigintioctomaculata in Yulin Area and Its Economic Thresholds
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植保技术与推广植保技術與推廣식보기술여추엄 PLANT PROTECTION TECHNOLOGY AND EXTENSION 2001年6期14-15,共2页
