咖啡豆象对新寄主麻疯树的危害

[目的]咖啡豆象是世界性仓储害虫,主要分布于热带亚热带地区,与重要能源植物麻疯树的生态区重叠,有必要调查其对麻疯树的危害性。[方法]以贵州罗甸种植区为调查点,对野外麻疯树林分及室内果实储藏物进行调查,掌握害虫发生情况及其为害后果,并对其分类地位进行确定。[结果]咖啡豆象在罗甸麻疯树种植区普遍分布,室内及林间均见其发生为害;成虫取食真菌,对麻疯树果实的直接为害性很小,但成虫将卵产于果皮内,幼虫在其中孵化并取食,最终可将果皮蛀空,从而对果实造成直接为害;另外,咖啡豆象还可能具有一系列的潜在危害性,包括直接蛀食种子、传播病原物、威胁产区其他经济作物等。[结论]麻疯树是咖啡豆象的新寄主,咖啡豆象对其有一定的危害性,对其产品、其他经济作物有潜在的危害性,应加强对咖啡豆象的研究和防控力度。

Damage of Coffee Bean Weevil (Araecerus fasciculatus De Geer) on Its New Host Jatropha curcas L

[Objective] Coffee bean weevil(Araecerus fasciculatus De Geer) is a worldwide important pest in storehouse,which distributes in tropical and subtropical region with overlapping ecological zone with the important biofuel plant Jatropha curcas L.The paper was to investigate the damage of coffee bean weevil on J.curcas.[Method]Taking cropping area in Luodian of Guizhou Province as the investigation point,the forest stand of J.curcas in field and the indoor stored fruits were investigated,and the occurrence condition and damage consequence of the pest were grasped.Furthermore,the taxonomic status of the pest was also confirmed.[Result]Coffee bean weevil had common distribution in planting area of J.curcas in Luodian,which was found to cause damage both in field and indoor condition.The adults of coffee bean weevil fed on fungi with little direct damage on the fruit of J.curcas;however,the adults of the pest laid their eggs inside the peel of fruit,and the larvae would hatch and feed inside the peel and bored the fruit peel into empty,thus causing direct damage on the fruit;in addition,coffee bean weevil might have series of potential damages including direct feeding on seeds,spreading diseases,and posing damage on other economic crops in production area,etc.[Conclusion]J.curcas was an important new host for coffee bean weevil.The pest had certain damage on the plant,which also had potential damage on plant products and other economic crops.The research and control efforts on coffee bean weevil should be strengthened.