JOURNAL OF APPLIED ENTOMOLOGY
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2020
·
IF 2.211
Haichen Yin,Wenjing Li,Min Xu,Dong Xu,Peng Wan
Many methods for management of mirid bugs, one of the major pest species in cotton fields, have been developed in recent decades. The use of attractive plant volatiles may be a safe and effective alternative compared with chemical pesticides. Very little is known about the responses of the bugs to some specific volatiles. In this study, the attractive effects for the mirid bug Apolygus lucorum were evaluated and compared among ethanol extracts obtained from six types of plants. The results showed that A. lucorum had the highest selection response rate to the extract from Allium tuberosum seeds and 70.51% of the adults tended to choose this odour source. Among 40 identified compounds of the volatiles comprising A. tuberosum seed extracts, diethyl phthalate and methyl levulinate had significantly higher attractive effects than that of cotton leaves, but the respective selection response rates were less than 65%. We found that when methyl levulinate and diethyl phthalate were mixed in volume ratios of 3:7 and 6:4, the selection response rates of A. lucorum for the mixtures were 54.67% and 63.65%, respectively. These response rates were significantly higher than those for the two compounds presented alone. Furthermore, the selection response rates of A. lucorum based on these mixtures reached 82.75% and 75.73%, respectively when compared with cotton leaves. The two volatile mixtures also showed a significantly higher attractive effect for Adelphocoris suturalis , with respective selection response rates at 74.58% and 77.80% when compared with cotton leaves. Moreover, the two attractants showed no difference between the responses of male and female mirid bugs. We concluded that an appropriate application of the attractants described herein has the potential to develop a safe and effective approach for the monitoring and control of mirid bugs in cotton fields.
研究领域:
昆虫学
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植物化学
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DOI
高影响因子
JOURNAL OF PEST SCIENCE
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2020
·Vol. 94
·期 2
·463-472
·
IF 4.578
Xu Hao,Zhao Jiajia,Li Faqian,Yan Qi,Meng Ling,Li Baoping
Riptortus pedestris (Fab.) is an important pest on soybean plants in East Asia. Females lay eggs scattered not only on host plants, but also on non-host plants, probably for avoiding detection by natural enemies. Newly hatched nymphs can develop to the second instar without the need of food except water. Second instar nymphs, the first-feeding stage with a strong locomotion, need to find suitable feeding sites on host plants. The mechanism is still not well understood. Here, we found second instars were attracted by both male and female adults, but generally repelled by second and fifth instar nymphs, wherein their responses were little affected by food volatiles (soybean seeds or seedlings). Nymphs distinctly differed from adults in chemical composition of the whole-body extracts. 4-oxo-( E )-2-Hexenal was the major component in nymph’s extracts, but it was not found in adults, whereas some ester compounds, such as ( E )-2-hexenyl esters, were exclusively found in adults and accounted for the main part in their extracts. The three esters, ( E )-2-hexenyl ( Z )-3-hexenoate (E2-6:Z3Hx), ( E )-2-hexenyl ( E )-2-hexenoate (E2-6:E2Hx) and myristyl isobutyrate, were male specific and had been reported as an aggregation pheromone. Synthetic 4-oxo-( E )-2-hexenal strongly repelled second instars, while ( E )-2-hexenyl hexanoate emitted by both males and females attracted them. The main component of the aggregation pheromone, myristyl isobutyrate, also strongly attracted second instars. How the findings may improve the efficiency of chemical traps in fields was discussed.
研究领域:
昆虫学
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化学生态学
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害虫管理
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产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Shuxing Zhou,Chunlin Li,Li Li,Feng Xie,Karyne M. Rogers,Yuwei Yuan,Jun Huang
Soy sauce, renowned for its distinctive taste and aroma, has become one of the most popular condiments worldwide. However, its odor attracts the flesh fly Parasarcophaga dux for larviposition, posing a threat to product quality and safety. Here, gas chromatography-ion mobility spectrometry (GC-IMS) was employed to analyze the differential volatile compounds in nine types of soy sauce with varying degrees of attractiveness to P. dux . Notably, 12 differential volatile compounds elicited antennal responses. Furthermore, olfactometer bioassays revealed 6 of them induced behavioral reaction. 3-hydroxy-2-butanone, 2-propanol, butanal, and 2-methylpyrazine were attractive to female flies, while β-myrcene and δ-octalactone exhibited repellent effects. These findings suggest that key volatile compounds with attractive or repellent properties may regulate the differential preference of P. dux for various soy sauces. This study provides a theoretical foundation for preventing P. dux larviposition in soy sauce through formula adjustment and supports the development of the soy sauce industry.
研究领域:
昆虫行为学
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食品化学
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化学生态学
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食品安全
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分析化学
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产品关联
DOI
PubMed
高影响因子
INSECT MOLECULAR BIOLOGY
·
2018
·Vol. 28
·期 1
·23-34
·
IF 2.492
Y.-L. Sun,J.-F. Dong,C. Ning,P.-P. Ding,L.-Q. Huang,J.-G. Sun,C.-Z. Wang
Parasitic wasps rely on olfaction to locate their hosts in complex chemical environments. Odorant receptors (ORs) function together with well-conserved odorant coreceptors (ORcos) to determine the sensitivity and specificity of olfactory reception. Campoletis chlorideae (Hymenoptera: Ichneunmonidae) is a solitary larval endoparasitoid of the cotton bollworm, Helicoverpa armigera , and some other noctuid species . To understand the molecular basis of C. chlorideae ’s olfactory reception, we sequenced the transcriptome of adult male and female heads (including antennae) and identified 211 OR transcripts, with 95 being putatively full length. The tissue expression profiles, as assessed by reverse-transcription PCR, showed that seven OR s were expressed only or more highly in female antennae. Their functions were analysed using the Xenopu slaevis oocyte expression system and two-electrode voltage-clamp recordings. CchlOR62 was tuned to cis -jasmone, which was attractive to female C. chlorideae adults and H. armigera larvae in the subsequent behavioural assays. Further bioassays using caged plants showed that the parasitism rate of H. armigera larvae by C. chlorideae on cis -jasmone-treated tobacco plants was higher than on the control plants. Thus, cis -jasmone appears to be an important infochemical involved in the interactions of plants, H. armigera and C. chlorideae , and CchlOR62 mediates the attractiveness of cis -jasmone to C. chlorideae .
研究领域:
昆虫学
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分子生物学
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生态学
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产品关联
DOI
PubMed
高影响因子
INSECT MOLECULAR BIOLOGY
·
2017
·Vol. 26
·期 5
·642-653
·
IF 2.844
J. Luo,Z. Li,C. Ma,Z. Zhang,J. J. Hull,C. Lei,S. Jin,L. Chen
Insect sex pheromones (SPs) are central to mate-finding behaviour, and play an essential role in the survival and reproduction of organisms. Understanding the roles, biosynthetic pathways and evolution of insect chemical communication systems has been an exciting challenge for biologists. Compared with Lepidoptera, little is known about the mechanisms underlying pheromone biosynthesis in Hemiptera. In this study, we isolated and characterized two new desaturase-like genes, termed Asutdes1 and Asutdes2 , from Adelphocoris suturalis , an important agricultural pest in China. Although the two genes encode an identical protein, Southern blot analysis revealed that they are duplicated genes. The Asutdes2 transcript is more abundant than Asutdes1 in the tissues tested, in particular the metathoracic scent gland and fat body. Silencing Asutdes expression in females by injecting double-stranded RNA ( dsAsutdes ) against a portion of the coding sequence shared by the two genes enhanced the production of (E)-4-oxo-2-hexenal, a component of the A. suturalis SP blend, and dramatically suppressed the sexual attractiveness of A. suturalis females. We conclude that dsAsutdes is associated with the SP biosynthetic pathway in A. suturalis .
研究领域:
昆虫学
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生物化学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
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