矢尖蚧蚜小蜂在重庆一年发生11～12代,主要以幼虫越冬。田间虫口7月上旬至翌年8月发生最多,9月中旬和11月中旬为高峰期,每叶虫口分别为14.3和15.7头。但是,寄生率高峰出现在7月,达70％;其次为9、10月。寄主越冬期间寄生率仍达17～25.6％。为了保护天敌,建议柑桔园喷洒农药防治矢尖蚧,以在蚜小蜂发生量少的季节(5～6月)为宜。 Agrimonia aphid wasps in Chongqing occur 11 to 12 generations a year, mainly larvae wintering. The most frequent occurrence occurred in the field from July in July to August in the following year, with the peak in mid-September and mid-November, with 14.3 and 15.7 heads per leaf respectively. However, the peak of parasitism appeared in July, reaching 70%; followed by September and October. Host parasitism during winter still reached 17 ~ 25.6%. In order to protect the natural enemies, citrus orchards are recommended to be used as pesticides to prevent and cure the arrowhead scale, so as to reduce the occurrence of aphids in the summer (May to June).