昆明桃园梨小食心虫发生规律

发布时间：2018-06-23 18:04

本文选题：桃园 + 梨小食心虫　；参考：《植物保护》2016年01期

【摘要】：2011-2013年对昆明桃园梨小食心虫发生规律及为害特点进行了系统调查研究。结果表明:3年来昆明地区梨小食心虫发生趋势基本一致,但各年度发生的大高峰期有差异,2012年成虫发生大高峰期为越冬代、第一代;2013年成虫发生大高峰期在第二、三代,这与当时的温度、降水量有很大关系。昆明梨小食心虫一年发生4代,越冬代成虫发生高峰期在3月中旬至4月上旬,第一代发生高峰期在5月上旬至6月中旬,越冬代、第一代主要为害桃树新梢,新植桃园幼虫更趋向在低龄桃树为害,幼虫蛀梢的高峰期在成虫羽化高峰期后15~30d;第二、三代发生高峰期在7月上旬至9月下旬,世代重叠明显,后两代主要为害果实。经饲养观察,桃园梨小食心虫性比[♀/(♀+♂)]为0.57~0.64,幼虫被天敌寄生率为26.9%,幼虫蛀果率为1.25%~5%。
[Abstract]:A systematic investigation was conducted on the occurrence regularity and damage characteristics of Pear fruit-eating insects in Taoyuan, Kunming, from 2011 to 2013. The results showed that the trend of occurrence of Pear fruit-eating insects was basically the same in Kunming during the past three years, but there were differences in the major peaks of occurrence in each year. The major peak period of adult occurrence in 2012 was overwintering generation, the first generation, and the adult occurrence peak in the second and third generations in 2013. This has a lot to do with the temperature and precipitation at that time. There were 4 generations per year of small heart-eating insects in Kunming pear, the peak of adult insects in overwintering generation was from mid-March to early April, and the first generation occurred from early May to mid-June. The first generation was mainly harmful to the new shoots of peach trees. The larva of newly planted peach orchard tended to be damaged by young peach trees, the peak period of larval shoot borer was 15 ~ 30 days after the peak of adult emergence, and the second, the third generation occurred from early July to late September, the generation overlap was obvious, and the last two generations were main fruit damage. The results of feeding and observation showed that the sex ratio of Peach orchard pear was 0.57 ~ 0.64, the parasitic rate of larva by natural enemy was 26.9m, and the rate of fruit borer was 1.25%.
【作者单位】：云南省农业科学院农业环境资源研究所;云南省农业科学院;
【基金】：国家水体污染控制与治理科技重大专项(2012ZX07102-003)
【分类号】：S433

【相似文献】