【摘要】 采用 32种植物的汁液进行毒杀蚜虫试验 ,结果表明 :有 2 0种 (占被试植物总数的 62 .5% )对蚜虫的杀死率达 50 %以上 ,其中 :9种 (约占被试植物总数的 2 8.1 % )对蚜虫的杀死率达 70 %以上 ,3种 (占被试植物总数的 9.4% )对蚜虫的杀死率达 90 % .更多还原

【Abstract】 With the juice extracted from 32 species of plants, we made the poisoning experiments upon aphides. The result showed that 20 species (62.5% of the total) killed more than 50% of aphides, 9 species (about 28.1% of the total) could mop up more than 70% of the insects and 3 species (9.4% of the total) wiped out over 90% of the pests.更多还原