丘北县云南松林区应用杀螟丹治理松小蠹的示范效果初报

连续近2年在丘北县受松小蠹中度以上危害的云南松林区,实施了喷施高效、微毒、低残留仿生农药3%杀螟丹(护林神)粉剂治理松小蠹虫害的示范试验。示范试验结果表明,在松小蠹转梢频繁期适时喷施杀螟丹粉剂,能挽救绝大多数的受害松树,而对未能挽救的零星新枯立木,采取及时清理并做灭虫处理,二者协同可压低林分的松小蠹虫口数量,使受害云南松林的蠹害指数,由治理前的45.5降至12.2,降低了73.2%,受害株率由90.5%降为39.7%,且未出现新的枯立木。充分表明,适时喷施杀螟丹粉剂防治,可控制松小蠹危害挽救大多数受害松树,能稳定云南松林分,保障云南松林林木的健壮生长。

Preliminary Report on Demonstration Effect of Tomicus piniperda Management by Using Cartap hydrochloride in Yunnan Pine Forest of Qiubei County

The experiments for manage and control Tomicus piniperda damage by using 3 % Cartap hydrochloride in Yunnan pine stands in Qiubei county of Yunnan province.The experimental results showed that spraying the Cartap hydrochloride in the peak time of pest transferring to shoot could save most of the trees,combining with cleaning the dead standing tree,the number of insect could be effectively controlled,the damaged index decreased from 45.5 to 12.2,the damaged rate decreased from 90.5 % to 39.7 %.Moreover, no emergence of new dead standing tree was found.The results indicated that spraying the Cartap hydrochloride at the proper time could save most of the damaged tree,stabilized the stand of Yunnan pine,and ensure the healthy growth of trees.