Attractive effect of maize volatiles and their mixtures on Apolygus lucorum
In order to screen the odorant volatiles with an attractive effect on Apolygus lucorum,and to explore and develop green and efficient control techniques for A.lucorum,the host selection preference of A.lucorum on six host plants was studied by means of electrophysiology,behavior,and field experiments.The host volatiles with the highest selection response were verified.The results showed that the female and male adults of A.lucorum had the highest selection response rate to maize,which was 37.7％and 33.5％,respectively,among the six main tested hosts,with female adults showing a stronger response than male adults.Among the main volatiles of maize,the female adults of A.lucorum had strong electrophysiological and behavioral responses to 3％2-ethylhexanol and 1％styrene,with the highest selection response rates of 75％and 76.9％,respectively.Further verification and field application of different combinations of the two volatiles showed that the best combination ratio of 1％styrene and 3％2-ethylhexanol was 1∶9.In the field trapping test,within 14 days,the average number of A.lucorum adults was 24.8 individuals per trap,which was 71％higher than that of the control group.In summary,this study clarified that styrene and 2-ethylhexanol were the key odor compounds attracting A.lucorum toward maize and had a good attractive effect on the insect.On this basis,an attractant formula for A.lucorum was developed,providing a new method for the green prevention and control of A.lucorum.
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