刺梨梨小食心虫的发生规律及防治措施研究

Occurrence Regularity and Control Measures of Graphditha molesta in Rosa roxburghii Fruit

调查了贵阳市刺梨梨小食心虫的发生规律,并研究了在不同时期采取不同方法的防治效果。结果表明：刺梨食心虫在贵阳地区1 a发生2～5代,幼虫出土时期在4月中下旬气温开始回升时,5月中下旬开始羽化,6月下旬～7月中上旬每7 d出现1次羽化高峰期,7月下旬渐入始末期。刺梨梨小食心虫的防治应农业防治与药剂防治相结合。刺梨采收后对园地进行人工防治,可减少越冬虫源86%以上;在开春气温回升时对刺梨园进行毒土撒施,好果率达92.5%以上;刺梨挂果前期进行药剂防治,好果率达93.5%以上。

The occurrence regularity of Grapholitha molesta in Rosa roxburghii fruit in Guiyang was investigated,and the effects of different control methods in different period were studied.The results showed that there were 2-5 generations every year.The larvae appeared in the middle and last ten days of April,and the adult appeared in the middle and last ten days of May.The emergence peak occurred every seven days from the first ten days of June to the middle and last ten days of July,and the end occurred in the last ten days of July. The agricultural control and chemical control should be combined. The artificial control should be taken after harvesting, and the overwinter pests could reduced by more than 86%. The good fruit rate was over 92.5% by broadcasting soil with pesticides, which was over 93.5% by chemical control before fruit bearing.