龙眼亥麦蛾发生为害特性及综合防治研究

龙眼亥麦蛾Hypitima longanae Yang et Chen在南宁年发生5－6代。其对龙眼石硖品种及春梢、花穗、二次秋梢蛀害较严重。龙眼结果母枝或花梗受蛀害可减产60％以上。此虫蛀害龙眼新梢与龙眼鬼帚症状无因果关系。采用修剪及疏花疏果时结合剪除虫枝，合理施肥，促进新梢抽发整齐；在顶牙萌动期及新梢小叶平展率达80％左右时，各喷一次高效灭百可或巴丹与乐果混合剂等药剂保梢的综合防治措施，防治效果达90．20％。

Studies on occurrence and integrated control of Hypitima longanae Yang et Chen on Longan

It was found that Hypitima longanae Yang et Chen,an important pest damaged longan shoot,occured 5~6 generations each year in Nanning.The injured level of longan shoot existed observably difference in different varieties and seasons.The longan variety Shixia and the spring shoot,late autumn shoot and the pedicel were more serious injured by the pest.It would reduce about 60% of yield if the fruit-bearing shoot and pedicel of longan were injured.The results showed that the pest mined shoot did not cause longan witches broom.The control effect reached to 90 20% by adopting integrated measure included to remove the infected shoots by pruning ,sprout trimly by fertilizing and to protect shoots by spraying Alpha cypmethrin or Padan mixed with Dimethoate when sprouting and the foliole unfolded about 80%,respectively.