树干注射7种生物源杀虫剂对松梢象的防治效果

Efficiency of Seven Bio-insecticides to Control Pissodes nitidus by Trunk Injection

为探索对松梢象（Pissodes nitidus）的有效防治方法,选择高渗苯氧威、猎擒、灭蚜风暴、高效氯氰菊酯、阿维菌素、啶虫眯乳油、苦参素7种生物源杀虫剂及昆虫生长调节剂,进行室内水培红松（Pinus koraiensis）主梢及林间红松树干打孔注射防治试验。室内试验结果表明,高渗苯氧威3 500倍液、猎擒3 000倍液及灭蚜风暴4 000倍液校正死亡率达到70%以上,且3种药剂的不同处理间防治效果差异不显著（p〉0.05）;将这3种药剂用于林间一次性防治,高渗苯氧威的5倍液、10倍液、15倍液及猎擒5倍液和灭蚜风暴5倍液的松梢象校正死亡率均达到80%以上。利用高效氯氰菊酯、阿维菌素、啶虫眯乳油3种药剂进行林间连续2年防治,每年防治1次,结果表明：第1年林间防治效果,除高效氯氰菊酯15倍液外,校正死亡率均达到60%以上,与对照组差异极显著（p〈0.01）;其中阿维菌素和啶虫眯乳油5倍液、10倍液的校正死亡率均达到80%以上;第2年林间防治效果高于第1年,松梢象校正死亡率均达到90%以上;连续防治后松梢象对红松危害株率小于4%,被害株率防治效果达到了84.9%~88.9%。因此,高渗苯氧威5倍液、10倍液和15倍液,猎擒5倍液,灭蚜风暴5倍液,阿维菌素和啶虫眯乳油5倍液和10倍液均可有效控制松梢象的危害。

In order to investigate effective prevention and control methods against Pissodes nitidus,seven bioinsecticides,including the 3% high penetrable fenoxycarb EC,0.5% emamectin benzoate EC,0.5% imidacloprid EC,4.5% beta-cypermethrin EC,2% abamectin EC,2% acetamiprid EC and 0.3% soluble matrine,were tested both in the lab using the hydroponic the tips of red pine Pinus koraiensis and in the field control bioassays via red pine trunk injections.The high penetrable fenoxycarb at 3 500×,emamectin benzoate at 3 500× or imidacloprid at 4 000× resulted in a corrected mortality rate of the pine weevils being above 70%,showing no significant dosage effects（p〉0.05）.In the field bioassays with one-time of trunk injection,fenoxycarb（at three concentrations,5×,10× and 15×）,emamectin benzoate（at 5×） and imidacloprid（at 5×） all achieved 〉80% corrected pine weevil mortality rates.The beta-cypermethrin,abamectin and acetamiprid were field tested in a two-year control trial（applied once a year） against P.nitidus.All the treatments except beta-cypermethrin at 15× showed 〉60% corrected mortality rates,which were significantly different from the control group（p〈0.01）;whereas abamectin and acetamiprid at 5× and 10× had 〉80% corrected mortality rates in the first year.The control efficacy was even higher in the second year with 〉90% pine weevil corrected mortality rates.The trunk injection applications of these insecticides in the two consecutive years resulted in a 〈4% infestation rate by the pine weevils on the Pinus koraiensis trees,and 84.9%-88.9% reductions in the damage rates.Therefore,high penetrable fenoxycarb at 5×,10 ×,and 15 ×,emamectin benzoate at 5×,imidacloprid at 5×,abamectin and acetamiprid at 5× and 10× can be used to effectively control P.nitidus in pine forests with trunk injections.