Insects
·
2026
·Vol. 17
·期 8
·860
·
IF 3
Huanwen Chen,Dan Xie,Li Liu,Lihong Jiang,Xiaowei Chen,Kai Ding,Xinhe Yu,Jia Yu,Defu Chi
Simple SummaryA bark beetle namedHylurgops longipillusdamages Korean pine plantations in Northeast China, killing trees in scattered patches. To fight these outbreaks, we created an emergency control system based on the beetle’s attraction to tree odors. We observed that the beetles prefer pines with slightly yellow needles and that infestations expand outward from hotspots. Using the natural scents of pine, we developed a powerful attractant that captured an average of 69.4 beetles per set of five traps over five days (1.8 times the standard lure), and a repellent that reduced trap catches by 83.3%. We then combined the removal and safe disposal of infested trees, chemical sealing of stumps, the joint use of the attractant and repellent (a push–pull strategy), and tree vigor enhancement for emergency control ofH. longipillus. After three years of monitoring, beetle trap catches dropped by about 94%, and no new outbreaks occurred.Under climate warming, bark beetle outbreaks increasingly threaten forest health.Hylurgops longipillus, a native bark beetle in Northeast China, causes patchy mortality inPinus koraiensisplantations. We developed an integrated emergency control system based on host selection chemical ecology. Damage characterization revealed that adults concentrated on trees with 10–50% crown needle yellowing, and infestations expanded as discrete patches radiating from multiple epicenters. Electrophysiological and behavioral assays of host volatiles and some of their isomers yielded a highly effective attractant (69.4 adults per five-trap set over 5 d, 1.8× control) and a repellent reducing ethanol-baited trap catches by 83.3%. Emergency control techniques consisted of integrated management combining removal and safe disposal of infested trees, chemical stump sealing, push–pull trapping, and tree vigor enhancement. Three-year monitoring showed ~94% decline in trap catches, no subsequent outbreaks, and stable control. This attractant-centered, chemical ecology-based system can rapidly suppressH. longipillusoutbreaks and achieve long-term management, providing a scientific basis and operational framework for similar localized bark beetle emergencies under climate warming.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·
IF 6.2
Yao Wang,Junhua Qiu,Chengwei Wang,Ruiyu Yang,Fuyou Guo,Tian Li,Shili Li,Lei Yang,Wei Ding
Plant-derived terpenoids are essential secondary metabolites exhibiting broad-spectrum antibacterial properties. However, the bioactivities of terpenoids against Ralstonia solanacearum remain unexplored. Herein, the bioactivities of 30 terpenoids against R. solanacearum were assessed, and trans-anethole (TAN) was identified as a potent antibacterial agent with a minimum inhibitory concentration and minimum bactericidal concentration of 50 and 75 mg/L, respectively. TAN was low-toxic to silkworms, earthworms, seeds, and E. coli. Furthermore, TAN (>25 mg/L) significantly impeded the R. solanacearum growth, blocked ATP and exopolysaccharide (EPS) synthesis, caused DNA damage and cell rupture, and affected swimming motility and biofilm formation, and suppressed expressions of related genes. Compared with thiodiazole copper, and ethylicin, 100 mg/L TAN had a significantly greater control efficiency in both greenhouse and field tests. Importantly, TAN enhanced the abundance of the beneficial bacteria Bacillus and Sphingomonas. These findings highlight TAN as a potential bacterial wilt control agent.
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PHYSIOLOGIA PLANTARUM
·
2026
·Vol. 178
·期 2
·e70832
·
IF 4
Lihong Jiang,Huanwen Chen,Dan Xie,Xiaowei Chen,Jianjiao Xu,Niya Jia,Zikai Pan,Yajing Wang,Yan Dai,Defu Chi,Jia Yu
Abiotic stresses such as high salinity or alkalinity usually alter plant secondary metabolism, thereby affecting their defense against herbivorous insects. This study investigated the effects of changes in terpenoids and phenolics of black pine ( Pinus thunbergii ) induced by salt, alkali, and mixed saline–alkali stresses on the host selection, host fitness, and laboratory bioassays of red-haired bark beetle ( Hylurgus ligniperda ). Field experiments showed that saline–alkali stress resulted in a decreased proportion of (1R)-(+)-α-pinene, an increased proportion of β-pinene and sabinene, and reduced contents of tannins, total flavonoids, and total phenols in the phloem of P. thunbergii , and promoted the damage of H. ligniperda to P. thunbergii . Laboratory bioassays showed that changes in terpenoids had a significant impact on the electroantennogram (EAG) and behavioral responses of H. ligniperda , while changes in phenolics had little effect on its growth and development. Based on Partial Least Squares Path Model (PLS-PM) comparison and laboratory bioassays results, terpenoids were identified as the main factor promoting damage of H. ligniperda to P. thunbergii . Specifically, saline–alkali stress enhances the host-locating ability of H. ligniperda , leading to an increase in its population density and thus promoting damage to P. thunbergii . This study provides insights into the complex interactions between plant physiology and insect behavior under abiotic stress, delivering more precise strategies for pest management in salinized–alkaline forest environments.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Xuewei Jia,Qingdan Yan,Yuan Gao,Yanchong Qin,Xueming Zhang,Liming Guo,Xiaoheng Ma,Jun Hu,Chunping Xu,Dongliang Li,Tianxiao Li
Aroma is a comprehensive sensory effect formed by the complex interaction of various volatile molecules, but there is still lack of effective methods for revealing the interactions of aroma compounds. In this study, totally 24 aroma-active compounds were identified from essential oils of Magnolia biondii , and were classified into spicy/woody and floral/fruity groups. Cluster analysis of molecular docking energies suggested the presence of distinct binding patterns. Ten key aroma compounds were identified through ROAV analysis and omission tests. Sensory interaction analyses indicated that the cross-category combinations exhibited mainly additive (50%) or masking effects (45.8%), and only β-pinene and linalool showed strong synergistic effect. It was found that structural complementarity was highly associated with interaction effects, and spicy/woody and floral/fruity compounds tended to bind to the TM3-TM5-TM6 and TM2-TM3 regions of OR1A1, respectively. A novel proposed method, binding energy ratio (RBE), was established to predict sensory interactions from dual-ligand docking data. Download: Download high-res image (204KB) Download: Download full-size image
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BIOMASS & BIOENERGY
·
2023
·
IF 6
Benqiang Zhu,Xiuxiu Zhao,Yingchao Zhang,Bing Yuan,Fengli Yu,Congxia Xie,Shitao Yu
A shape-selective bifunctional catalyst (Ru x /SOT-Hβ) was furnished by loading Ru onto the Hβ zeolite prepared via seed organic template (SOT) method using the seeds obtained via steam-assisted conversion (SAC) method. The Ru x /SOT-Hβ catalyst exhibited both favorable acid-catalytic performance and hydrogenation performance in the two-stage one-pot conversion of α-pinene, enabling an energy-efficient process for producing biomass blended high energy density fuels (HEDF). The effect of preparation conditions of Hβ zeolite carrier, metal type, loading amount, and loading method on the catalytic performance of the bifunctional catalyst was investigated. After the optimization of the catalytic process over Ru 1.2 /SOT-Hβ using pinane as the reaction medium, the resulting liquid reaction mixture without undergoing further distillation and other operations was found to possess good biomass HEDF properties. Feasible recyclability of Ru 1.2 /SOT-Hβ catalyst in α-pinene one-pot conversion was also demonstrated by a 3-run recycling test.
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INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Shuzhen Yang,Min He,Dongmei Li,John Shi,Litao Peng,Liu Jinjing
The antifungal activity of essential oils is closely related to their components and contents. The study aimed to explore the structural activity of essential oil (EO) components against Diaporthe fusicola and modes of action. The results showed most of the tested compounds showed inhibitory effects on the growth of D. fusicola and carvacrol was the strongest one with half maximal effective concentration (EC 50 ) of 11.21 μL/L. The chemical structures of the tested compounds had great influences on their antifungal activity, in which the presence of CHO group, C C group or Ar-OH group in any EO components significantly increase the antifungal potency, but the increment of carbon chain length of saturated fatty aldehyde decreased antifungal activity. In order to analyze the antifungal action mode of EO components, the correlations between EC 50 and oxidation-reduction potential (ORP), cell-membrane permeability and respiration inhibition of the tested compounds were further evaluated. The results showed antifungal activities of these EO components seemed to be accomplished by increase of cell membrane permeability and inhibition of the respiration of D. fusicola . The levels of increased membrane permeability, inhibited respiration and ORP of chemicals were all significantly correlated with EC 50 . This results indicated the action mode of these EO components against D. fusicola may be associated with the increment of cell membrane permeability and respiration inhibition via disrupting redox homeostasis in fungal cells, and oxidation-reduction property could be used as a secondary indicator for screening the antifungal agent from EO components.
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Cells
·
2022
·Vol. 11
·期 23
·3856
·
IF 7.666
Bin Liu,Hui Chen
The aryl hydrocarbon receptor (AhR) and aryl hydrocarbon receptor nuclear translocator (ARNT) belong to the bHLH-PAS (basic Helix–Loop–Helix–Period/ARNT/Single-minded) family of transcription factors, which participate in the sensing and transmitting stimuli of exogenous and endogenous chemical substances, and subsequently activates genes transcription involved in various detoxification and physiological functions. However, they have not been identified inDendroctonus armandi,and their roles in the detoxification metabolism are unclear. In the present study,AhRandARNTofD. armandiwere characterized. Spatiotemporal expression profiling indicated thatDaAhRandDaARNTwere highly expressed in the adult and larval stages ofD. armandiand mainly expressed in the midgut and Malpighian tubules of adults. Additionally, the expression ofDaAhRandDaARNTsignificantly increased after exposure to (−)-
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CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Mingzu Liu,Xiuxiu Zhao,Zefeng Ma,Bing Yuan,Fengli Yu,Congxia Xie,Shitao Yu
As a naturally rigid polycyclic biomass platform compound without oxygen, α-pinene has always been expected to develop high-energy–density fuel with both good combustion performance and cryogenic properties by increasing carbon number in a high atom economical way. The present work has explored the screening of alkylation blocks for α-pinene over H 3 PW 12 O 40 (HPW). Here, a novel pinene-based blended fuel was prepared through cross-alkylation of α-pinene with mixed isobutane/isobutene, the common low-cost feedstock of alkylated gasoline. The reaction conditions including feed composition, reaction time, catalyst dosage, and reaction temperature were optimized. The mechanism of the hybrid alkylation process was further computationally speculated and experimentally verified. Produced liquid hydrocarbon products after hydrogenation and vacuum distillation possessed higher net heat of combustion and flash point than those of pinane, and lower freezing point and viscosity than those of dimers fuel from pinene. These favorable performances indicate that alkylated pinanes have promising potential as high-energy aviation fuel.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Meiqin Li,Zhihui Feng,Fang Wang,Jianxin Chen,Jie Fan,Jieqiong Wang,Zhengquan Liu,Junfeng Yin
There is a huge demand for brewing water in tea consumption, and the sensory flavor of tea infusion is significantly affected by the water used for brewing. To investigate the impact of brewing water on the aroma of tea infusions made from Camelia senensis , the three tea infusions of green, oolong and black tea brewed by six different drinking waters were analyzed by sensory evaluation, solid-phase microextraction, gas chromatography–mass spectrometry, and chemometrics. Brewing water with high pH values (>8.10) and high TDS content (>140 ppm) resulted in a lower overall aroma acceptability for tea infusion, where HCO 3 – , Ca 2+ and Mg 2+ were key influencing ions. A total of 86, 106, and 131 volatiles were identified in green, oolong and black tea infusions, respectively, which were strongly influenced by six different brands of waters. Decanal, dimethyl sulfide, β-ionone and linalool were potent volatiles in tea aroma changes caused by brewing water.
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Foods
·
2023
·Vol. 12
·期 13
·2560
·
IF 5.2
Wu Wang,Tingting Li,Jing Chen,Yingwang Ye
This research investigates the antibacterial potential of plant essential oil components including thymol, carvacrol, citral, cinnamaldehyde, limonene, and β-pinene againstSalmonellaEnteritidis (S.Enteritidis). Through the determination of minimum inhibitory concentration, three kinds of natural antibacterial agents with the best inhibitory effect onS.Enteritidis were determined, namely thymol (128 μg/mL), carvacrol (256 μg/mL), and cinnamaldehyde (128 μg/mL). Physical, chemical, microbial, and sensory characteristics were regularly monitored on days 0, 2, 4, and 6. The findings of this study reveal that both thymol at MIC of 128 μg/mL and carvacrol at MIC of 256 μg/mL not only maintained the sensory quality of chicken, but also decreased the pH, moisture content, and TVB-N value. Additionally, thymol, carvacrol and cinnamaldehyde successfully inhibited the formation ofS.Enteritidis biofilm, thereby minimizing the number ofS.Enteritidis and the total aerobic plate count in chicken. Hence, thymol, carvacrol, and cinnamaldehyde have more effective inhibitory activities againstS.Enteritidis, which can effectively prevent the spoilage of chicken and reduce the loss of its functional components.Keywords:SalmonellaEnteritidis;thymol;carvacrol;cinnamaldehyde
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BIOLOGICAL CONTROL
·
2022
·
IF 3.857
Jinhao Zhao,Minmin Liang,Zhongyan Wang,Yanyan Zhao,Jingli Cheng,Yongjun Du
Trichogramma dendrolimi Matsumura (Hymenoptera: Trichogrammatidae) is one of the most important parasitic natural enemies of Grapholita molesta (Busck) (Lepidoptera: Tortricidae) in peach and pear orchards. The artificial rearing T. dendrolimi have been widely used in biological control programs in recent years. However, its actual parasitic effect on the pest in the field is less, so it is important to develop attractants to increase the parasitic efficiency of the parasitoids. T . dendrolimi can be easily attracted by semiochemicals derived from flowers, intact plants, herbivore-attacked plants, and insects in its orchard habitats. In this paper, 73 semiochemicals were evaluated as potential attractants at three concentrations (0.1 mg/mL, 1 mg/mL, and 10 mg/mL) to T . dendrolimi by Y-tube olfactometer bioassays and Electroantennogram (EAG) technology, and then the mixtures of active individual compounds were further tested and evaluated in the field. As a result, 17 individual compounds showed attractive bioactivity to T . dendrolimi . Interestingly, when methyl salicylate and benzaldehyde mixed with linalool oxide or cis -3-hexenyl caproate in a volume ratio of 10:3:3 respectively showed excellent attractant bioactivity for T . dendrolimi in the orchard field. Thus, introducing such parasitoid attractants in orchard habitat may improve the biological control effect to pests.
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BIOLOGICAL CONTROL
·
2022
·
IF 3.857
Shaolong Wu,Fengli Liu,Weiai Zeng,Zhipeng Xiao,Jiaying Li,Kai Teng,Qianshaung Guo,Jinhao Zhao,Yongjun Du
In tobacco planting in China, the artificial release of aphid parasitoids Aphidius gifuensis has been applied to control aphids for a decade. However, due to seasonal effects and crop rotation, the sustainability of releasing parasitoids and the aphid control efficacy have not been properly evaluated. In this study, effective semiochemical-based attractants were further screened and optimized in the tobacco fields. Film lures were developed to release the synthetic attractant blends. In tobacco planting fields, the synthetic mixture of β-pinene, methyl salicylate , linalool , and limonene(6:6:2:20 mg) significantly increased the population of natural enemies, including A. gifuensis and ladybeetles ( Coccinella septempunctata , Harmonia axyridis and Hippodamia variegate ) monitored using using malaise traps. The increase in the natural enemy population was related to the season and the lure placement density in the tobacco fields, as well as the distribution of surrounding habitats and flowering plants. A density of 135 lures per hectare significantly increased the number of parasitoids, reduced the population of aphids, elevated the rate of parasitized aphids by 42%, and effectively suppressed the aphid population in the tobacco fields. Combined with the protection of flowering plants around tobacco fields, synthetic lures may provide a technical measure for conservative biological control.
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