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梨小食心虫是为害杏、梨、桃、苹果、沙果、枣等多种果树果实的严重害虫之一。近年来,梨小食心虫对我队的杏子为害较严重,虫果率一般在60％以上,有时高达99％。被害的杏子,果实内充满虫粪不能食用,对杏子生产造成了严重损失。为了进行有效的防治,1973年我们对梨小食心虫的生活规律作了室内饲养和田间观察,并进行了田间喷药防治次数和防治适期的试验。现将初步观察、试验结果整理如下,供防治参考。一、梨小食心虫的形态特征:从略(请参阅《宁夏农业昆虫图志》第146～147页)。二、梨小食心虫的发生规律:一年发生约二代以上,以老熟幼虫在树皮下或土内结茧越冬,次年4月中、下旬化蛹,4月下旬到5月上旬为成虫羽化期。成虫在夜间活动,交配产
Pear mungbean beet apricot, pear, peach, apple, sago, jujube and other fruit trees, one of the serious pests. In recent years, Pear Moxibustion on my team’s apricots more serious damage, insect fruit rate generally above 60%, sometimes up to 99%. Victims of apricots, fruit insects filled with insecticide can not eat, caused a serious loss of apricot production. In order to carry out effective prevention and control, in 1973 we conducted the indoor feeding and field observation on the law of the life of Pear moth, and carried out the field spraying and prevention and control of the number of trials and the appropriate period. Now preliminary observation, test results are organized as follows, for prevention and treatment of reference. First, the pest mungbean morphological characteristics: omitted (see “Ningxia Agricultural Insect Map” 146 ~ 147). Second, the occurrence of pears mungbean pest: about a second generation a year or so, with mature larvae cocoon under the bark or soil overwintering, the following year in April, the late pupation, from late April to early May adult Feathering period. Adult activity at night, mating production