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Insects
·
2020
· Vol. 11
· 期 2
· 94
·
IF 2.22
Jihong Zhang,Huyin Li,Maorong Liu,Huan Zhang,Hai Sun,Hongtuo Wang,Lin Miao,Miaomiao Li,Ruihao Shu,Qilian Qin
Population control of small sucking insects has been challenging, and alternative control methods are constantly being sought. Visual traps have long been used to monitor and control pests. Colored sticky cards are widely used for diurnal pests, but their effects are influenced by environmental light conditions. Artificial light traps are mostly used for nocturnal pests. Here, we explored and evaluated light-emitting diode (LED) traps for the monitoring and control of small diurnal sucking insects using greenhouse tests targeting the greenhouse whiteflyTrialeurodes vaporariorum. We tested the trapping efficacy of the LED water pan trap, assessed the most attractive LED light and analyzed its efficacy under different weather conditions. The results showed that the LED water pan trap was too inefficient to be useful. Green LEDs were more attractive than yellow LEDs, UV LEDs and green-UV combinations. Regardless of sunny or cloudy conditions, the green LED trap caught more than twice the number of whiteflies than the yellow sticky card alone under summer shading conditions. Our study suggests that LED traps have a significant field application value in whitefly mass trapping and may also be efficient for other diurnal insects. The design of LED traps specific for diurnal insects is discussed.
研究领域:
昆虫学
·
农业科学
✓ 已验证
DOI
高影响因子
PEST MANAGEMENT SCIENCE
·
2024
·
IF 3.8
Xin-Yue Zhang,Wen-Hao Han,Feng-Bin Zhang,Jun-Xia Wang,Shu-Sheng Liu,Xiao-Wei Wang
BACKGROUND The whitefly Bemisia tabaci is one of the world's foremost agricultural pests. Recently, we found that a wild relative of tobacco ( Nicotiana benthamiana ) demonstrates remarkable attractiveness and nearly 100% lethality towards whiteflies. Therefore, it can act as a dead-end trap crop for whitefly control in the field. However, the underlying mechanism of the significant attractiveness of N. benthamiana towards whiteflies is unclear. RESULTS Binary-choice assays and olfactory experiments showed that compared to common tobacco ( N. tabacum ), the volatile of N. benthamiana has a greater attraction to whiteflies. Then we analyzed and compared volatiles from these two Nicotiana species by thermal desorption-gas chromatography–mass spectrometry (TD-GC–MS). We identified 16 chemical compounds that are more abundant in N. benthamiana than in N. tabacum. Seven compounds were further tested with olfactometer assays and we found that, among them, undecane strongly attracted whiteflies. Further experiments revealed that even 0.005 μg mL −1 undecane is attractive to whiteflies. We also silenced the genes that may influence the biosynthesis of undecane and found the production of undecane decreased after silencing NbCER3 , and that N. benthamiana plants with less undecane lost their attraction to whiteflies. In addition, we found that applying 0.005 μg mL −1 undecane on yellow sticky traps can increase the number of stuck insects on the traps by ≈40%. CONCLUSION Undecane from the volatile of N. benthamiana is a critical chemical signal that attracts whiteflies and NbCER3 involved in the biosynthesis of undecane. Undecane may be used to improve the efficiency of yellow sticky traps for whitefly control. © 2024 Society of Chemical Industry.
研究领域:
农业昆虫学
·
植物科学
·
化学生态学
✓ 已验证
DOI
PubMed
高影响因子
PEST MANAGEMENT SCIENCE
·
2024
·
IF 3.8
He Wu,Wen-Hao Han,Kai-Lu Liang,Jun-Xia Wang,Feng-Bin Zhang,Shun-Xia Ji,Shu-Sheng Liu,Xiao-Wei Wang
BACKGROUND Jasmonic acid (JA) is an important phytohormone used to defend against herbivores, but it does not respond to whitefly feeding. Conversely, another phytohormone, salicylic acid (SA), is induced when plants are fed upon by whiteflies. JA has a better anti-whitefly effect than SA; however, there is limited research on how to effectively improve plant resistance by utilizing the different responses of these phytohormones to whitefly feeding. RESULTS We discovered that protease inhibitors 8 ( PI8 ) and terpene synthase 10 ( TPS10 ) located downstream of the JA-regulated pathway in plants have anti-whitefly effects, but these two genes were not induced by whitefly feeding. To identify whitefly-inducible promoters, we compared the transcriptome data of tobacco fed upon by Bemisia tabaci with the control. We focused on pathogenesis - related ( PR ) genes because they are known to be induced by SA. Among these PR genes, we found that expression levels of pathogenes - related protein 1C - like ( PR1 ) and glucose endo - 1 , 3 - beta - glucosidase ( BGL ) can be significantly induced by whitefly feeding and regulated by SA. We then engineered the whitefly-inducible promoters of BGL and PR1 to drive the expression of PI8 and TPS10 . We found that compared with control plants that did not induce the expression of PI8 or TPS10 , transformed plants expressing PI8 or TPS10 under the PR1 or BGL promoter showed a significant increase in the expression levels of PI8 and TPS10 after whitefly infection, significantly improving their resistance to whiteflies. CONCLUSION Our findings suggest that using SA-inducible promoters as tools to drive the expression of JA-regulated defense genes can enhance plant resistance to whiteflies. Our study provides a novel pathway for the enhancement of plant resistance against insects. © 2024 Society of Chemical Industry.
研究领域:
植物学
·
分子生物学
·
昆虫学
✓ 已验证
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