橘光绿天牛对九里香绿化球的危害及其经济损失评估

Harm of Chelidonium citri Grressitt to Murraya paniculata (L.) Jack Balls and Economic Damage Appraisal

关键词:  橘光绿天牛  九里香  危害调查  损失评估

Key words:  Chelidonium citri Grressitt  Murraya paniculata(L.) Jack  damage investigation  damage appraisal

摘要:

分别于2002年6月27日和8月29日调查广西生态工程职业技术学院内种植的九里香[Murraya paniculata(L.) Jack]受橘光绿天牛(Chelidonium citri Grressitt)危害的状况并进行危害价值损失评估。结果表明,九里香绿化球受害株率90.7%,枝枯株率74.1%,有虫株率75.9%,虫口密度2.11,危害度31.5%。危害造成枝枯宽度平均为61cm,占平均树冠周长的14.4%;枝枯平均深度为68.4 cm,占平均树高50.8%。植株东向受害最多,占受害总株数30%;中部枝枯宽度占树冠周长比例最大,为22.9%;西南方向枝枯深度最深,占高度的90.9%。九里香绿化球价值损失占总价值的38.7%。学院的九里香绿化球受橘光绿天牛危害严重,需要及时有效的预防与防治。

Abstract:

The damaged individuals of Murraya paniculata (L.) Jack by Chelidonium citri Grressitt were investigated in the campus of Guangxi Polytechnic of Ecology Engineering on 27th June and 29th August 2002. The damaged individuals reached 90.7%,and 74.1% was wethered,75.9% was found harmful insects,with insect density 2.11 and injury extent 31.5%.The width of damaged area was 61 cm on average,accounting for 14.4% of average perimeter of tree crown. The wethered crown is 68.4 cm in depth,accounting for 50.8% of average tree height. Thirty percent of damaged trees were found to be damaged in the eastern tree crown. The wethered area in the middle of tree crown accounted for 22.9% of perimeter of tree crown. The wethered area in the southwestern tree crown was deepmost,accounting for 90.9% of tree height. The loss derived from the harmful insects made up 38.75% of total worth.