7种杀虫剂防治荔枝蝽象的药效试验

Experiments of 7 Insecticides Effects on the Prevention and Control of Tessaratoma papillosa Drury

为了寻找出对荔枝蝽象(Tessaratoma papillosa Drury)高效、持效、安全的杀虫剂,通过室内毒力试验和田间药效试验研究7种杀虫剂对荔枝蝽象的防治效果。结果表明,30%敌百虫乳油1000倍液和5%锐劲特悬浮剂2000倍液对荔枝蝽象成虫的杀虫效果最好、药效最稳定,室内施药后72h时30%敌百虫乳油1000倍液对荔枝蝽象成虫的校正死亡率达到100%、5%锐劲特悬浮剂2000倍液对荔枝蝽象成虫的校正死亡率达到98.35%,田间施药后1、3、7天此2种杀虫剂对荔枝蝽象的虫口减退率和田间防治效果均在90%以上。其次10%吡虫啉可湿性粉剂1000倍液、52.25%农地乐乳油2000倍液和2.5%敌杀死乳油3000倍液也表现出对荔枝蝽象良好的防治效果,室内施药后72h时10%吡虫啉可湿性粉剂1000倍液对荔枝蝽象成虫的校正死亡率为96.65%、52.25%农地乐乳油2000倍液对荔枝蝽象成虫的校正死亡率为95.00%、2.5%敌杀死乳油3000倍液对荔枝蝽象成虫的校正死亡率为93.35%;田间施药后3、7天此3种杀虫剂对荔枝蝽象的虫口减退率和防治效果均达到90%以上。

To find out the high-efficiency, long time-efficiency and safe insecticides to the Tessaratoma papillosa Drury, 7 kinds of insecticides were evaluated through both lab9ratory toxicity tests and field trials. The results showed the 1000 times of 30% trichlorfon EC and the 2000 times of 5% regent （fipronil） suspension possessed comparatively satisfied and stable effects on Tessaratoma papillosa Drury. After using these 2 pesticides in the laboratory for 72 h, the corrected mortality of Tessaratoma papillosa Drury adults amounted to 100% and 98.35% respectively. After using these 2 insecticides for 1 d, 3 d and 7 d in the field, Tess^atoma papillosa Drury＇s population decline rate and field control effect were above 90%. Also, the 1000 times of 10% imidacloprid WP, the 2000 times of 52.25% chlorpyrifos and the 3000 times of 2.5% dehamethrin EC showed a good control efficiency on Tessaratoma papillosa Drury, which could make the correct mortality reached to 96.65%, 95.00% and 93.35% respectively after used for 72 h in the laboratory. Meanwhile, the effects of these three insecticides on Tessaratoma papillosa Drury＇ s population decline rate and field control efficiency were above 90% after used for 3 d and 7 d in the field.