红砂7种挥发物对槐绿虎天牛成虫的引诱活性

Attractive activity of seven volatiles from Reaumuria soongorica on the adult of Chlorophorus diadema

为了研制高效的槐绿虎天牛诱剂,从其成虫寄主植物红砂的挥发物中选取7种化合物,即苯乙醛、2-戊醇、2-戊酮、环庚三烯、异丁酸异丁酯、甲基丙烯酸甲酯和氢乙酰胺,分别研究单一组分和多组分配方对槐绿虎天牛的触角电位(EAG)、嗅觉行为和野外诱集效应.结果表明,7种单一组分中,槐绿虎天牛雌、雄虫均对体积分数为1.000 0%的苯乙醛有最大的EAG反应相对值和相对选择率,体积分数为0.100 0%的2-戊醇和0.010 0%的2-戊酮对雌、雄虫也有较高的引诱活性,其他4种化合物则活性较低甚至具有驱避作用.以3种引诱活性较高的化合物制成的4种复合配方中,配方M(苯乙醛和2-戊酮的体积比为1∶1)和配方N(苯乙醛和2-戊醇的体积比为1∶1)对槐绿虎天牛具有较高的引诱活性和较好的野外诱集效果,且引诱活性高于单一组分.

To develop efficient attractants of Chlorophorus diadema, seven compounds, which are the volatiles of adult host-plant Reaumuria soongorica, were selected to research their attractive activity on the adults of Chlorophorus diadema. The compounds include phenylacetaldehyde, 2-pentanol, 2-pentanone, cycloheptatriene, isobutyl isobutyrate, methyl methacrylate and cyanoaeetamide. EAG, behavior and trap experiment were performed on Chlorophorus diadema with these compounds in single component and mixed formulation. The results showed that： as for the single component, the EAG response values and relative selection rates both achieved the maximums with the phenylacetaldehyde of 1.000 0% （volume fraction ） ; 2-pentanol of 0.100 0% （volume fraction ） and 2-pentanone of 0.010 0% （volume fraction ） showed higher attractive activity to Chlorophorus diadema. The other four compounds had lower biological activity or a repellent effect. In the four blends made of the three compounds with highly attractive activity, formulation M （the volume ratio of phenylacetaldehyde to 2-pentanone is 1 ： 1 ） and formulation N （the volume ratio of phenylaeetaldehyde to 2-pentanol is 1 ： 1 ） had higher attractive activity and better field trapping effect, and their attractive activity was higher than that of the single component.