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桃小食心虫在黑龙江省每年发生1～2代,越冬幼虫6月中下旬出土。越冬成虫7月上中旬产卵,卵期5～12天,7月中下旬幼虫孵化,蛀入果内,8月上旬第一代幼虫老熟,脱果入土,做茧越冬。只有少部分脱果早的可以发生第二代。第一代成虫8月中旬出现,第二代幼虫9月上旬脱果入土越冬。越冬幼虫次年出土高峰期和越冬代成虫产卵高峰期与5月上旬旬平均温度、旬雨量之间存在显著的相关性。据此,建立了桃小食心虫越冬幼虫出土高峰的预报式,和越冬代成虫产卵高峰的预报式。利用当年5月上旬旬平均温度、句雨量即可进行当年桃小食心虫防治时期的早期预报。通过防治时期的药剂筛选试验认为:越冬幼虫出土期用50％马拉硫磷乳剂1,000倍液,或用25％甲基1605粉剂(0.5～1斤/株)喷撒于树盘上,卵期用2.5％溴氰菊酯4,000倍液喷于树冠上防治初令幼虫,经济而有效。桃小食心虫(Carposina nipponensis walsingham)是苹果的重要害虫,在我省合江地区分布普遍,危害严重。果实受害率一般在15～20％,个别年份可达40～50％,严重影响果品质量和产量。
Peach beetle worms occur in Heilongjiang Province 1 to 2 generations a year, overwintering larvae unearthed in mid-June. The overwintering adult spawn in mid-July and the oviposition period is 5-12 days. The larvae hatch in the middle and late July and erode into the fruit. In early August, the first-generation larvae are over-cooked and detached into the soil, making the cocoon wintering. Only a small part of the early fruit can take second generation. The first generation of adults appeared in mid-August, the second generation of larvae in early September off-fruit into the winter. There was a significant correlation between the peak temperature of the overwintering larvae in the next year and the overwintering adult oviposition peak and the mean temperature and the amount of ten days in early May. Based on this, the forecasting formula for the peak of the overwintering larvae of peach moth and the forecasting formula of the spawning peak of the overwintering adults were established. Using the average temperature in early May of that year, the sentence amount of rainfall can be the early forecast of Peach moth prevention and control period. Through the control of drug screening during the experiment that: overwintering larvae with 50% malathion emulsion 1,000 times the liquid, or with 25% methyl 1605 powder (0.5 to 1 kg / strain) sprayed on the tree plate, the egg stage With 2.5% deltamethrin 4,000 times sprayed on the canopy control early larvae, economical and effective. Carposina nipponensis walsingham is an important pest of apple and it is widespread in Hejiang area of our province and it is harmful. Fruit damage rate is generally 15 to 20%, up to 40 to 50% in individual years, seriously affecting fruit quality and yield.