套袋鸭梨果面黑点的成因及其防治方法

STUDY OF BAGGING YA PEAR FRUIT′S SPOT

鸭梨套袋是目前栽培中的标准方法 ,但套袋后的鸭梨往往在果面形成黑点 ,发生率可达 6 0 %以上 ,严重影响果实的外观和质量。研究发现 ,果面黑点的形成有多种原因 ,最主要的是梨黄粉蚜和梨木虱等害虫入袋为害造成的。防治方法是田间防治加防止入袋技术 ,可有效地降低套袋鸭梨的果面黑点率。

Ya pear bagging is the current culture method in the orchards, but after bagging, on Ya pear′s fruit surface much of black spot often happened,seriously influenced fruit′s look and quality, rate of Ya pear fruit with spot is 60% above.Study showed that insect entered in the bags is the main reason,especially Pear psylla and Pear phylloxera.Control measures are spaying and preventing insect into bags, these methods can efficiently decline the rate of Pear fruit′s spot.