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[学术文献 ] Design of and Experimentation with a Suction-Based Pest-Capture Machine for the Tea Pest Empoasca vitis 进入全文
Agriculture-Basel 期刊
To investigate an effective physical pest control method for tea trees, we designed and manufactured a suction-based pest-capture machine (hereafter labeled the “pest vacuum”) and conducted a test and field experiment to evaluate its effectiveness in the control of Empoasca vitis Göthe (E. vitis). Based on the proposed model, the minimum practical air velocity of the pest vacuum was 5.85 m s−1. The field experiment included two treatments and a blank control. In treatment 1, we used the pest vacuum along tea trees only once, while in treatment 2, the pest vacuum was used along trees twice, separately, in 2 consecutive periods, and with an interval of more than 30 min. The results show that a highly significant difference arose among the dropping rates of the two treatments and the blank control instantly after suction, a significant difference among the dropping rates 7 days later, and no significant difference 14 days later. The dropping rate and the effective rate of prevention of treatment 2 reached 81.87% and 80.60% instantly after suction. Moreover, the effective rate of prevention of nymphs was slightly higher than that of adults. Overall, the pest vacuum had a prominent, albeit short-term, effect on the control of E. vitis. Seven days after the suction, it is better to repeat the suction five days after the first suction. The pest vacuum provides a valid physical method for pest control, so more attention should be paid in future investigations to reducing the weight and working noise of the pest vacuum.
[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.
[前沿资讯 ] The French Tea Sector Moves Toward Premiumization 进入全文
World Tea News 网站
The French tea sector is steadily growing as the popularity of tea leads to the increase of its consumption among the French. In the last couple of decades, tea has become one of the most popular hot beverages in the country, while the market has evolved from basic tea bags to high-end teas, with the latter enjoy the biggest demand these days. According to recent statistics of industry associations, in the last 25 years, the consumption of tea in France has grown by three times, while tea has never been so popular in France at present. Today, one in three French people drink it regularly. This trend is particularly observed among women, who represent 57% of consumers. According to experts of the French Viralma, among their main preferences are green teas and health and wellbeing teas, whose sales have jumped by 30% in one year. The pandemic and lockdown in France also had a significant impact on the local tea market, doubling tea consumption at home. As a result, France is now the 30th largest tea consumer in the world, importing nearly 15,000 tons of leaves each year. In value terms, the market exceeds EUR 500 million, while its growth is ongoing although the per capita consumption remains generally small, not exceeding 250 gr per year (compared to 2kg in case of UK). In general, the overall tea consumption in the country is estimated at 30,000 tonnes per year.
