白香草木樨等植物对黑绒金龟甲诱集作用的研究

A Study on the Attractive Effects of White Sweetclover and Other Plants to Chafer Beetle

桑园点播种植白香草木樨早春诱集黑绒金龟甲等害虫、再集中药杀的技术收到较好的防治效果。本项研究对白香草木樨、几种作物和田间杂草对黑绒金龟甲的引诱作用进行了比较，并试图找到白香草木樨引诱黑绒金龟甲的化学物质基础。应用嗅觉计、触角电位、田间罩笼试验及室内行为测定等方法研究了白香草木樨对黑绒金龟甲的引诱作用，分析测定表明了白香草木樨茎叶提取物主要成分香豆素对引诱作用的影响。结果表明，白香草木樨对黑绒金龟甲的引诱作用大于玉米苗、小麦苗、大豆苗、马铃薯片、狗尾草、桃叶和杨叶；大豆苗、狗尾草喷上香豆素溶液后对黑绒金龟甲的诱集作用有所提高。黑绒金龟甲对白香草木樨、巴天酸模、藜及香豆素溶液的触角电位反应测定结果中以藜和白香草木樨引起的电位反应最大。

White sweetclover(Melilotus albus Desr.)was planted in a mulberry garden to attract chafer beetle (Serica orientalis Motschulsky) and other insects,and then sprayed with insecticides to kill the insects.The new technique was a good way to control beetles in spring.In this study,the attraction effects of white sweetclover to Serica orientalis were compared with some crop seedlings and weeds. In this paper the olfactory test,electroantennogram (EAG)responses,indoor bioassay and field tests were employed to study the attractive effects of white sweetclover to chafer beetles.The main component coumarin of sweetclover plant extracts was analyzed and identified.The results showed that the attraction of white sweetclover to chafer beetle was stronger than corn,wheat,soybean seedlings,potato pieces,leaves of peach and poplar trees.The attraction to beetles was improved when seedling of soybean and foxtailgrass were sprayed with coumarin solution.Chafer beetles' EAG responses to Lambsquarters and white sweetclover were most significant as compared with Patience Dock and coumarin solutions.