PEST MANAGEMENT SCIENCE
·
2023
·Vol. 79
·期 11
·4547-4556
·
IF 4.1
Lina Pan,Wenfang Gao,Xinyu Liu,Dongyu Qin,Tiantian Zhang,Rui Ren,Weiyi Zhang,Meidi Sun,Cuiqing Gao,Penghua Bai,Wei You,Gengping Zhu,Min Li
BACKGROUND How parasitoids distinguish hosts from non-hosts remains an unknown question. Chouioia cunea Yang (Eulophidae) is an important fall webworm parasitoid that attacks many forest and agricultural pests. To study the differences in the chemical clues used by C. cunea to distinguish host and non-host plants, we used gas chromatography–mass spectrometry (GC–MS) to identify volatile compounds of two C. cunea hosts ( Hyphantria cunea and Helicoverpa armigera ) and two non-hosts ( Spodoptera exigua and Spodoptera frugiperda ). Additionally, we used behavioral assays to compare the attraction of C. cunea to various compounds. RESULTS The two natural host species were more attractive than the two non-host species, in the following order: Hyphantria cunea > Helicoverpa armigera > S. exigua = S. frugiperda . The pupae of the natural hosts contained 1-dodecene, which was not produced by the two natural non-hosts. When the ‘attractants’ based on the difference between the species-specific blend emitted by pupae and the optimal blend were sprayed onto the natural non-host pupae, they significantly improved the attraction of C. cunea to the non-host pupae. CONCLUSION These results revealed that specific host-produced volatile compounds guide C. cunea to distinguish between natural hosts and non-hosts. Overall, this study provides a foundation for developing a behavior-modifying strategy to re-direct C. cunea attacks to control important non-host pests. © 2023 Society of Chemical Industry.
研究领域:
昆虫学
·
化学生态学
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产品关联
DOI
PubMed
高影响因子
PEST MANAGEMENT SCIENCE
·
2019
·Vol. 76
·期 5
·1920-1928
·
IF 3.255
Min Li,Yixin Yang,Yonghong Yao,Weifang Xiang,Jiayi Han,Yonghui Wang,Penghua Bai,Jing Wang,Gengping Zhu,Liang Man,Fan Zhang,Lina Pan
BACKGROUND Chouioia cunea Yang (Hymenoptera: Eulophidae) is a parasitic wasp and natural enemy of several lepidopteran pests during their pupal stage. The volatiles from pupae of three hosts, Hyphantria cunea (Arctiidae), Antheraea pernyi (Saturniidae) and Lymantria dispar (Erebidae), were analyzed and compared to elucidate the chemical cues used by C. cunea to locate its hosts. RESULTS The attraction of C. cunea to H. cunea pupae has no obvious association with the types of plant leaves consumed by H. cunea before pupation. C. cunea exhibited the strongest attraction to the pupae of H. cunea , followed by those of A. pernyi and L. dispar based on behavioral experiments. Gas chromatography-mass spectrometry and GC-electroantennography (GC-EAD) analyses showed that these three host pupae consisted of essentially the same active volatile components but at different relative amounts. Active components derived from these pupae by GC-EAD were alkanes from C12 to C27, and C. cunea showed different levels of attraction to different single compounds. CONCLUSION Host location by C. cunea primarily depends on common compounds emanating from the pupae of several host species. The relative amount of each component varies across host species, guiding host preferences by C. cunea . Optimal blends of several components were identified. Understanding the chemical cues used by C. cunea to locate its host could increase the possibility of developing attractants for parasitic wasps and subsequently increasing the parasitism rate of C. cunea on various hosts. © 2019 Society of Chemical Industry
研究领域:
昆虫学
·
化学生态学
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DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2023
·
IF 9.8
Mingtao Tan,Hongfei Wu,Yaning Li,Aoying Zhang,Jinsheng Xu,Rusong Chai,Zhaojun Meng,Shanchun Yan,Dun Jiang
The toxicity of heavy metals on various trophic levels along the food chain has been extensively investigated, but no studies have focused on parasitic natural enemy insects. Herein, we constructed a food chain consisting of soil– Fraxinus mandshurica seedlings– Hyphantria cunea pupae– Chouioia cunea to analyze the effects of Cd exposure through food chain on the fitness of parasitic natural enemy insects and its corresponding mechanism. The results showed that the transfer of Cd between F. mandshurica leaves and H. cunea pupae and between H. cunea pupae and C. cunea was a bio-minimization effect. After parasitizing Cd-accumulated pupa, the number of offspring larvae, and the number, individual size (body weight, body length, abdomen length) and life span of offspring adults decreased significantly, while the duration of embryo development extended significantly. The contents of malondialdehyde and H 2 O 2 in Cd-exposed offspring wasps increased significantly, accompanied by a significantly decrease in antioxidant capacity. The cellular immunity parameters significantly decreased in Cd-accumulated pupae, including the number of hemocytes, melanization activity and the expression level of cellular immunity genes (e.g. Hemolin-1 and PPO1 ). The humoral immunity disorder was found in the Cd-accumulated pupae, as evidenced by that the expression level of immune recognition gene ( PGRP-SA ), signal transduction genes ( IMD , Dorsal , and Tube ), as well as all antimicrobial peptide genes (e.g. Lysozym and Attacin ) decreased significantly. Cd exposure decreased the content of glucose, trehalose, amino acid, and free fatty acid in H. cunea pupae. The expression of Hk2 in glycolysis pathway and the expression of Idh2 , Idh3 , Cs , and OGDH in TCA cycle pathway were significantly down-regulated in Cd-accumulated pupae. Taken together, exposure to Cd through the food chain causes oxidative damage on the offspring wasps and disrupts energy metabolism of the host insect, ultimately reducing the parasitic fitness of C. cunea to H. cunea pupae.
研究领域:
生态毒理学
·
昆虫学
·
环境科学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）