【摘要】 对中熟苹果金冠进行免套袋栽培和套袋栽培下梨小食心虫群体发生动态的监测，喷施4种杀虫剂进行田间防治药效试验。结果表明，2021年泰安金冠苹果园的梨小食心虫成虫发生始末期为3月中下旬至10月上旬，有5个较明显的羽化高峰；梨小食心虫成虫的发生动态趋势、羽化高峰期及持续时间，在免套袋果区与套袋果区间差异不明显；性信息素诱捕器全年梨小食心虫成虫的诱捕量，套袋园区每诱捕器1 786头，显著高于免套袋园区为每诱捕器1 033头。在梨小食心虫第3代成虫羽化高峰前期的7月20日和羽化高峰期的7月27日连续2次施药发现，10%环丙氟虫胺可分散液剂1 250～2 500倍液、200 g/L氯虫苯甲酰胺悬浮剂5 000倍液、200 g/L四唑虫酰胺悬浮剂5 000倍液对梨小食心虫的蛀果防效均显著高于5%甲维盐水分散粒剂2 500倍液的防效。更多还原

【Abstract】 In this paper, the population dynamics of Grapholitha molesta B.(Lepidotera: Tortricidae) were monitored in the medium-ripe Golden Delicious apple orchards under non-bagging and bagging cultivation, and the field efficacy of the four insecticides ciproffluramide, chlorobenzamide, metretinate and tetrazolamide were tested. The results showed that the adults of G. molesta in 2021 emerged from mid to late March and ended in early October, and there were five obvious occurrence peaks. There was no significant difference in the occurrence trend, emergence peak and duration in the adults of G. molesta between non-bagging and bagging cultivation. The year-round number of G. molesta caught by sex pheromone traps in non-bagging orchards(1 033 insects per trap) was significantly lower than that in bagging orchards(1 786 insects per trap). It was found that after twice pesticide application before(July 20) and just in(July 27) the occurrence peak of the third-generation adults, the control effects of 10% ciprofluramide DC 1 250～2 500 times, 200 g/L chlorobenzamide SC 5 000 times and 200 g/L tetrazolamide SC 5 000 times on G. molesta were significantly higher than that of 5% emavilate WG 2 500 times.更多还原