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[专业会议 ] Explore the Future of Tea at World Tea Expo 2025 进入全文
World Tea News 网站
随着全球茶叶行业的不断发展，世界茶博会也在不断发展，它将来自行业各地的茶叶专业人士汇集在一起。今年，世界茶叶博览会将于3月24日至26日在拉斯维加斯会议中心举行，以满足茶叶行业不断变化的需求。2025年世界茶叶博览会不仅仅是一个贸易展，它是一个动态的平台，反映了全球茶叶行业面临的变化和挑战。无论是应对气候变化，寻找市场路线，还是用冰茶和RTDs吸引新一代饮茶者，世界茶博览会始终处于促进关键讨论和展示尖端产品的最前沿，这些产品定义了茶的未来。今年，世博会将在二楼有自己的专用入口，由日本主办的官方剪彩和开幕式。日本在今年的世界茶叶博览会上以其展馆的参展商占据了主导地位，突显了其在全球茶叶市场上日益增长的影响力。虽然斯里兰卡和中国等传统强国已经缩减了参与规模，但日本的主导地位为渴望在利润丰厚的美国市场站稳脚跟的新供应商和生产商打开了大门。
[学术文献 ] Development of a Novel Attractant-Baited Sticky Board and Its Application for the Highly Efficient Control of Aleurocanthus spiniferus in Tea Plantations 进入全文
ACS Agricultural Science & Technology 期刊
Aleurocanthus spiniferus is an important tea plant pest globally. The effective chemical control of the whitefly is challenging due to its overlapping generations of a large individual number of minuscule wax-covered nymphs and pupae inhabiting the underside of mature leaves within shaded tea bushes. Moreover, the pandemic of tea sooty mold always occurs with its outbreaks. After emergence, whitefly adults engage in mating, ovipositing, excreting honeydew, piercing, and sucking on tea shoots. Our study showed that whitefly adults highly preferred the jasmine yellow sticky boards, each baited with a tea plant volatiles-based 6-component attractant lure (60 mg loading) consisting of benzaldehyde, 1-hexanol, methyl salicylate, trans-2-hexenal, cis-3-hexen-1-ol, and linalool at a 1:2:4:4:7:12 ratio, denoted as the Aleurocanthus spiniferus attractant with a sticky jasmine yellow board (ASASJYB). The effective trapping distance of ASASJYBs was determined to be 12 m, with whitefly adult catches on each board ranging from dozens to 40,000 individuals within several days. Trapping by ASASJYBs could accurately predict the beginning, peak, and ending periods of the emergence and also catch significant numbers of the gravid females. From end March to early April, application of ASASJYBs at a rate of 225 traps per ha in tea plantations could catch the most overwintering-generation adults and consequently suppress the whole year’s whitefly nymph and pupal populations below the control threshold. In main Chinese tea-growing regions, ASASJYBs have been widely used to control the whiteflies efficiently and in an eco-friendly manner.
[学术文献 ] UGT89AC1‐mediated quercetin glucosylation is induced upon herbivore damage and enhances Camellia sinensis resistance to insect feeding 进入全文
Plant, Cell & Environment 期刊
Quercetin is a key flavonol in tea plants (Camellia sinensis (L.) O. Kuntze) with various health benefits, and it often occurs in the form of glucosides. The roles of quercetin and its glucosylated forms in plant defense are generally not well-studied, and remain unknown in the defense of tea. Here, we found higher contents of quercetin glucosides and a decline of the aglucone upon Ectropis grisescens (E. grisescens) infestation of tea. Nine UGTs were strongly induced, among which UGT89AC1 exhibited the highest activity toward quercetin in vitro and in vivo. The mass of E. grisescens larvae that fed on plants with repressed UGT89AC1 or varieties with lower levels of UGT89AC1 was significantly lower than that of larvae fed on controls. Artificial diet supplemented with quercetin glucoside also reduced the larval growth rate, whereas artificial diet supplemented with free quercetin had no significant effect on larval growth. UGT89AC1 was located in both the cytoplasm and nucleus, and its expression was modulated by JA, JA-ILE, and MeJA. These findings demonstrate that quercetin glucosylation serves a defensive role in tea against herbivory. Our results also provide novel insights into the ecological relevance of flavonoid glycosides under biotic stress in plants.
[学术文献 ] Rational design, synthesis and binding mechanisms of novel benzyl geranate derivatives as potential eco-friendly aphid repellents 进入全文
Pest Management Science 期刊
BACKGROUND：The push–pull strategy is considered as a promising eco-friendly method for pest management. Plant volatile organic compounds (PVOCs) act as semiochemicals constitute the key factor in implementing this strategy. Benzyl alcohol and geraniol, as functional PVOCs, were reported to regulate insect behavior, showing the potential application in pest control. Using geraniol as lead, a geraniol derivative 5i with fine repellent activity was discovered in our previous work. In order to explore novel, eco-friendly aphid control agents, a series of benzyl geranate derivatives was designed and synthesized using 5i as the lead and benzyl alcohol as the active fragment. RESULTS：Benzyl alcohol was firstly evaluated to have repellent activity to Acyrthosiphon pisum. Based on this repellent fragment, a series of novel benzyl geranate derivatives was rationally designed and synthesized using a scaffold-hopping strategy. Among them, compound T9, with a binding affinity (Kd = 0.43 μm) and a substantial repellency of 64.7% against A. pisum, is the most promising compound. Molecule docking showed that hydrophobic and hydrogen-bonding interactions substantially influenced the binding affinity of compounds with ApisOBP9. Additionally, T9 exhibited low-toxicity to honeybees and ladybugs. CONCLUSION：Using a simple scaffold-hopping strategy combined with active fragment benzyl alcohol, a new derivative T9, with high aphid-repellency and low-toxicity to nontarget organisms, can be considered as a novel potential eco-friendly aphid control agent for sustainable agriculture.
[学术文献 ] Odorant Receptor PxylOR11 Mediates Repellency of Plutella xylostella to Aromatic Volatiles 进入全文
Frontiers in Physiology 期刊
Insects can use plant volatiles to guide certain behaviors, such as courtship, mating, host positioning, and habitat selection. Plutella xylostella is a global agricultural pest and has always been closely studied, but relatively few studies assess the molecular mechanism of P. xylostella exposed to plant volatiles. In this study, we analyzed the role of the odorant receptor PxylOR11 when P. xylostella is exposed to plant volatiles. Our analysis of tissue expression demonstrated that PxylOR11 is expressed in the antennae and that expression levels in female moths were significantly higher than in male moths. Functional analyses using the Xenopus oocyte expression system demonstrated that PxylOR11 was tuned to three aromatic compounds: benzyl alcohol, salicylaldehyde, and phenylacetaldehyde. Electroantennogram analyses revealed that these three aromatic compounds can induce electrophysiological responses in the antennae of P. xylostella, and that the electroantennograms response value of female moths was significantly higher than that of male moths. Dual-choice bioassays demonstrated that the three aromatic compounds have a repellent effect on female P. xylostella. These results suggest that PxylOR11 has a role in mediating the repellent effect of aromatic volatiles on P. xylostella and can be used as a potential target to design novel olfactory regulators controlling P. xylostella.
[会议论文 ] Modeling the impact of a sex Pheromone/Kairomone attracticide for management of codling moth (Cydia pomonella) 进入全文
PROCEEDINGS OF THE 6TH ISCMFROM
The pear-derived volatile, ethyl (2E, 4Z)-2,4-decadienoate is a potent, stable, and selective bisexual kairomone for codling moth, Cydia pomonella L. Its discovery creates an unique opportunity to develop monitoring and control tactics targeted for both male and female moths. Here we present a population model that compares the relative effectiveness of a male-only versus a bisexual attracticide. The model tracks daily changes in the population densities of pupae, males, and mated and virgin females using daily survival rates, and natural and insecticide-related mortality for eggs and larvae. The use of sex pheromones for mating disruption is included as a scalar variable affecting mating success. Mating is also influenced by the level of competition between virgin females and the insecticide-laced pheromone point sources (determined by their density and potency). The attractiveness of the kairomone lure is determined by the density and relative attractiveness of individual fruits within the cropping system. The potency (attractiveness and lethality) of the attracticide point sources decline at a constant rate over time. Our modelling results demonstrate that the use of a female attractant greatly improves the effectiveness of the “attract and kill” technique. Our model output is compared with field data collected from apple plots treated with mating disruption and a grid of pheromone/kairomone-baited insecticide-treated stations during 2001. The influence of the seasonal attractiveness of ethyl (2E, 4Z)-2,4-decadienoate for codling moth within walnut, pear, and apple orchard the success of the “attract and kill” approach is discussed.
