›› 2018, Vol. 61 ›› Issue (10): 1184-1191.doi: 10.16380/j.kcxb.2018.10.008

• RESEARCH PAPERS • Previous Articles     Next Articles

Identification of the trace sex pheromone components of Conogethes punctiferalis (Lepidoptera: Crambidae) female adults on maize and optimization of their ratio in sex pheromone lures used in maize fields

XU Xiang1, KONG De-Sheng2, FENG Bo3, QIAN Kai3, DU Yong-Jun4,*   

  1.  (1. Sichuan Provincial Plant Protection Station, Department of Agriculture, Chengdu 610041, China; 2. Zoucheng Plant Protection Station, Shangdong Province, Zoucheng, Shandong 273500, China;3. Institute of Health and Environmental Ecology, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China; 4. Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China)
  • Online:2018-10-20 Published:2018-10-20

Abstract: 【Aim】 The purpose of this study is to further clarify the complete composition of female sex pheromone of the yellow peach moth, Conogethes punctiferalis, infesting maize and its olfactory profile. 【Methods】 The extracts of pheromone glands from sexually mature female moths of C. punctiferalis infesting maize were analyzed by gas chromatography -mass spectrometry (GC-MS), and sex pheromone components were confirmed with the synthetic compounds. The olfactory responses were detected and analyzed by electroantennogram recording technique. The mixtures of sex pheromone components were screened and optimized by field trapping tests in Sichuan and Shandong in 2014. 【Results】 E10-16∶Ald was the main component of sex pheromone of female adults of C. punctiferalis on maize, while traces of Z10-16∶Ald and Z10-16∶OH were also detected. The unmated female adults did not respond to the five sex pheromone compounds including E10-16∶Ald, 16∶Ald, Z10-16∶Ald, Z10-16∶OH and E10-16∶OH, while the unmated male adults responded strongly to E10-16∶Ald and Z10-16∶Ald, and also responded to E10-16∶OH and Z10-16∶OH. In the field tests with lures containing three components (E10-16∶Ald, Z10-16∶Ald and 16∶Ald) and four components (E10-16∶Ald, Z10-16∶Ald, 16∶Ald and E10-16∶ OH) at different ratios in Sichuan and Shandong in 2014, the lure containing E10-16∶Ald, Z10-16∶Ald and 16∶Ald at the ratio of 95∶5∶10 trapped the highest number of adults. The trace component Z10-16∶OH in Sichuan showed no significantly synergistic effect, while showed significantly synergistic effect in Shandong, and the lure containing E10-16 ∶Ald, Z10-16∶Ald, 16∶Ald and E10-16∶OH at the ratio of 95∶5∶10∶5 showed the highest trapping efficacy. 【Conclusion】 The complete composition of the sex pheromone of C. punctiferalis on maize includes E10-16∶Ald, Z10-16∶Ald, 16∶Ald and E10-16∶OH, and their optimal ratio is 95∶5∶10∶5.

Key words: Conogethes punctiferalis, host plant, EAG, sex pheromone, geographical variation, lure