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[统计数据 ] Tea Export Quantity from Five Continents in 2020-2022（FAOSTAT） 进入全文
FAO 网站
根据FAOSTAT，最新统计了2020-2022年度五大洲和世界茶叶出口数量（tonnes），以及三年茶叶出口数量总值，详细数据见表 Tea Export Quantity from Five Continents in 2020-2022（FAOSTAT）。
[学术文献 ] Oligosaccharins Promote the Tea Plant to Resist the Invasion of Phyllosticta fheaefolia and Improve the Quality of Tea 进入全文
ACS Agricultural Science & Technology 期刊
Previous reports have shown that oligosaccharins could regulate the defense responses in plants. However, the application of oligosaccharins in tea plantations to resist the invasion of diseases is largely unknown. In this study, we tested the control efficiency of oligosaccharins against the disease Phyllosticta fheaefolia in the tea plantations in Guizhou, China. Then, we detected the tea quality effect by oligosaccharins. The results showed that the control efficiency of oligosaccharins to P. fheaefolia was 47.37% (3 days, 2018), 52.43% (3 days, 2019), 48.20% (7 days, 2018) and 55.57% (7 days, 2019). After 1 month, the contents of moisture (P < 0.05, 2018, 2019), polyphenol (P < 0.01, 2018, 2019), and amino acid (P < 0.05, 2018) in the oligosaccharins region was significantly higher than those in the control region. Thus, oligosaccharins can promote the tea plant to resist the invasion of P. fheaefolia and improve the quality of tea in Chinese tea plantations.
[学术文献 ] Behavioral Responses of Western Flower Thrips (Frankliniella occidentalis) to Visual and Olfactory Cues at Short Distances 进入全文
Insects 期刊
Western flower thrips (WFT), Frankliniella occidentalis (Pergande), is a highly invasive pest, infesting many species of plants worldwide, but few studies have investigated the visual and olfactory cues associated with their foraging behaviors. In this study, the distance traveled by WFT to locate yellow cards using only visual cues and visual cues plus olfactory cues was studied first. Subsequently, preferences for colors (white, red, green, purple, yellow and blue) and patterns (triangle, rectangle, circle and flower-shape) over short distances were assessed with free-choice tests. Finally, as yellow was the most efficient color to catch WFT under laboratory conditions, the yellow flower-shape was used as the visual cue, and preferences between visual and olfactory cues were evaluated with dual choice tests. The results showed that the capture rate of WFT by visual cues decreased as selection distance increased, however capture rate remained higher with the addition of olfactory cues. The flower shape attracted the greatest number of WFT among all shapes tested. The combination of visual cues and extracted volatiles from flowering Medicago sativa L. attracted higher numbers of WFT than to the olfactory cues alone, however these were similar to visual cues alone. The presence of olfactory cues resulted in higher residence times by WFT than did the absence of olfactory cues. These results show the relative effects of visual and olfactory cues on the orientation of WFT to hosts and highlight that visual cues dominate selection behavior at short distances. These findings can be used in the development of efficient trapping products and management strategies for thrips.
[学术文献 ] Bionomics and management of Scirtothrips dorsalis Hood (Insecta: Thysanoptera: Thripidae) on Camellia sinensis (L) O. Kuntze in tea plantations of north-eastern India 进入全文
International Journal of Tropical Insect Science 期刊
Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) is a polyphagous and cosmopolitan pest. Its infestation on tea plant has increased considerably in the last few decades as a result of which it has now got established as one of the major sucking pests in the tea-growing areas of north-eastern (NE) India, and the rest of India at large. A number of factors, such as climate change, deforestation, over-reliance on pesticides, coupled with the capability of thrips to sustain and survive in monocultures, high reproductive rate both by parthenogenesis and sexual mode, short generation time, ability to survive as cryptic, quiescent prepupa and pupa and development of resistance to insecticides influence their periodical outbreaks. Tea thrips cause both direct and indirect damage to tea plants by feeding as well as egg laying in tender leaf tissues and buds causing stunted plant growth and significant yield loss. In this review, all available details pertaining to S. dorsalis infesting the tea plants have been summarised in the context of its management.
[学术文献 ] Silicon Induced Defense Mechanisms and Pathways of Host Resistance for Insect Pests of Field and Horticultural Crops 进入全文
Silicon 期刊
The application of Silicon modulates the plant defense mechanism by signaling secondary defense metabolites activating signal transduction pathways further triggering the HIPVs which in turn attracts natural enemies thereby suppressing the pest population. Continuous mono culturing of high yielding varieties with intensive cultural practices lead to depletion of available Si in soils and hence exogenous application of Si sources is necessary. Exploiting plant resistance and strengthening the induced defenses through Si and PGR could represent an effective viable alternative to synthetic insecticides that could form an efficient tactic in integrated pest management including biological control. In this context, we underscore recent advancements in understanding Si-mediated enhancement of plant resistance against pests, emphasizing the significance of these findings for potential incorporation into future strategies for crop protection.
[学术文献 ] Highly sensitive and selective electrochemical biosensor using odorant-binding protein to detect aldehydes 进入全文
Analytica Chimica Acta 期刊
Recently, various biosensors based on odorant-binding proteins (OBPs) were developed for the detection of odorants and pheromones. However, important data gaps exist regarding the sensitive and selective detection of aldehydes with various carbon numbers. In this work, an OBP2a-based electrochemical impedance spectroscopy (EIS) biosensor was developed by immobilizing OBP2a on a gold interdigital electrode, and was characterized by EIS and atomic force microscopy. EIS responses showed the OBP2a-based biosensor was highly sensitive to citronellal, lily aldehyde, octanal, and decanal (detection limit of 10−11mol/L), and was selective towards aldehydes compared with interfering odorants such as small-molecule alcohols and fatty acids (selectivity coefficients lower than 0.15). Moreover, the OBP2a-based biosensor exhibited high repeatability (relative standard deviation: 1.6%–9.1%, n = 3 for each odorant), stability (NIC declined by 3.6% on 6th day), and recovery (91.2%–96.6% on three real samples). More specifically, the sensitivity of the biosensor to aldehydes was positively correlated to the molecular weight and the heterocyclic molecule structure of the odorants. These results proved the availability and the potential usage of the OBP2a-based EIS biosensor for the rapid and sensitive detection of aldehydes in aspects such as medical diagnostics, food and favor analysis, and environmental monitoring.
