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桃小食心虫在黄河故道地区苹果树上一年发生2—3代。越冬幼虫出土期间55—60天,盛期在6月上中旬。成虫发生始期在6月初,终期9月中旬末。由于越冬幼虫出土期长,各代发生不整齐,世代衔接或重叠。但仍出现3个成虫高峰期,即:6月下旬至7月上旬,8月上中旬,8月下旬至9月初。脱果的老熟幼虫滞育始期在7月末,盛期在8月中旬,8月末全部入土结冬茧。成虫产卵对苹果品种有明显的选择性,当早、中、晚熟品种同时存在时,嗜好在中熟品种上产卵,其中以金帅为最嗜品种。
Peach beetle worms occurred in apple trees in the old course of the Yellow River 2-3 years a year. Overwintering larvae unearthed 55-60 days, the peak in mid-June. Adult onset occurred in early June, the end of September mid-end. Due to the long period of overwintering larvae unearthed, generational convergence, generational convergence or overlap. However, there are still three adult peak, namely: late June to early July, mid August, late August to early September. Diapause of mature larvae diapause beginning of the end of July, the peak in mid-August, the end of August all cotyledons. Adult oviposition of apple varieties have obvious selectivity, early, middle and late varieties at the same time, the hobby spawning on the maturing varieties, of which the most handsome species as the most handsome.