药剂与生物防治协调控制甘草萤叶甲和甘草蚜虫

为了很好地控制甘草多发性害虫,针对甘草主要害虫甘草萤叶甲（Diorhbda tarsalis）和甘草蚜虫（Aphiscraccivora）,采用不同时期施药和释放天敌,确定最佳防治时期及防治指标.结果表明,5月中旬,甘草萤叶甲虫口基数达到4头/株时为防治关键时期,采用苦参碱（8.33μg/mL）进行控制,药后21 d防效可达93.91%,很好地压低了越冬成虫虫口基数;5月下旬,甘草蚜虫开始发生,虫口基数为50~80头/株时释放天敌（3头/m2）,此时对甘草蚜虫的控制效果最好,可达80%以上.研究对甘草萤叶甲和甘草蚜虫起到了很好的协调控制作用,为建立甘草害虫综合防治技术体系提供了理论依据.

Coordinating Control of Pesticides and Biological Control on Diorhbda tarsalis and Aphis craccivora

In order to control multiple pests of Glycyrrhiza uralensis, ideal controlling time and index of the main pests of Glycyrrhiza uralensis Diorhbda tarsalis and Aphis craccivora were confirmed by imposing medication and setting free natural enemies. The results showed that the middle ten days of may, when the number of Diorhbda tarsalis reached 4 head in one trunk,was the key time to control Diorhbda tarsalis, efficacy was 93.91% in 21 days after imposing Matrine （8.33μg/mL）. The last third part of may, when Aphis craccivora began to occur and its number reached 50-80 heads in one trunk, natural enemies （3 heads in one square） were set free, the control effect on Aphis craccivora was good and efficacy was above 80%. This research had good coordinated controlling effect on Diorhbda tarsalis and Aphis craccivora, and provided theory basis for setting up integrated controlling technology system of Glycyrrhiza uralensis pests and diseases.