Pruning

Green Pest Management Techniques for Tea Trees Main Targets of Control ↑ Tea Blight Disease → Tea Looper Pests: Tea Green Leafhopper, Tea Looper, Tea Caterpillar, Tea Black Worm Moth, Black Scale Psyllid, Tea Red Mite. Diseases: Tea Blight Disease, Tea Anthracnose. Key Control Measures Agricultural Control 1. Timely Harvesting. Harvest young buds and leaves according to the requirements of tea production to reduce the population of pests like the tea green leafhopper, mites, and some bud diseases residing on the canopy surface of the tea tree. 2. Pruning as Needed. Prune tea trees after the spring harvest and in late autumn according to the requirements of tea garden management, reducing pest populations and creating conditions unfavorable for pests. Generally, deep pruning or heavy pruning is done after the spring harvest, and light pruning is performed in late autumn. 3. Garden Tilling. In late autumn, till the tea garden combined with the application of base fertilizer, which is detrimental to the survival of scale insects and weevils overwintering in the soil, thus reducing their occurrence in the following year. 4. Timely Garden Cleanup. Clear and bury leaves and topsoil near the roots of tea plants in late autumn, which can…

During the spring warming period, cold air often invades, causing a significant drop in temperature. This weather, characterized by warmth before and cold after, is known as late spring cold. Late spring cold generally refers to prolonged periods of low temperatures and overcast rainy weather after the Vernal Equinox, specifically when the temperatures in late March or early April are lower than average. Depending on the timing, it can be further divided into "Vernal Equinox Cold" and "Qingming Cold." "Vernal Equinox Cold" occurs when the daily average temperature remains below 10°C for five days or more, with less than three hours of sunshine, from March 15 to March 27. "Qingming Cold" refers to low-temperature and rainy weather from March 28 to April 10. The Harm of Late Spring Cold to Tea Plants: In addition to variety, soil, fertilization, management, and processing skills, the production of high-quality tea also depends on climatic conditions. The relationship between tea production and temperature, sunlight, and rainfall is close. When the daily average temperature remains above 10°C for three consecutive days, tea buds begin to sprout and unfurl; once the temperature stabilizes above 10°C, the growth of buds and leaves accelerates, and new shoots emerge.…

Great tea is grown, but it is also well-managed. As the saying goes: "One-third planting, two-thirds management." After three seasons of growth and harvesting in spring, summer, and autumn, the tea plant has expended a great deal of nutrients, and the soil between rows becomes compacted. As winter approaches, proper garden management becomes particularly important for the quality and yield of next year's tea leaves. For this reason, the Tea Industry Development Working Group, in collaboration with Guizhou Broadcasting Station's Ecology & Rural Channel, has produced a teaching video on tea garden management during autumn and winter for reference and learning by tea companies and farmers. The video received strong support from the Guizhou Tea Research Institute and covers four parts: fertilization principles and recommendations, pruning techniques for tea plants, pest and disease control, and cold prevention measures. 1 Winter Fertilization According to the growth and development patterns of tea plants, as they enter autumn and winter, the above-ground parts will gradually stop growing and enter dormancy. However, the underground parts become increasingly active and enter the peak period of root activity throughout the year. At this time, the plant's root system significantly strengthens its absorption capacity and has a…

Severe Infestation of Tea Looper How to Cope, Find Out Here It is currently late summer and early autumn, with cool weather in the morning and evening. This year has seen more rain than usual, resulting in vigorous growth of tea plants with lush green leaves, providing rich food for tea plant pests. According to investigations into the infestation of tea loopers in Longwu tea gardens, various age groups of larvae coexist, with severe overlapping generations. In some severely affected areas of tea gardens, the older leaves have been completely consumed, affecting the growth of tea plants, which requires close attention from tea garden managers. Due to differences in cultivation and management practices among individual households, the timing of infestations and the degree of damage vary across different tea gardens, making pest control challenging. It is essential to strengthen pest monitoring through field observations and the use of trapping devices, promptly understanding the dynamics of pest outbreaks and implementing appropriate measures: 1. Turn on insect-killing lamps, taking advantage of the fact that adult tea loopers are most active between 8:00 PM and 10:00 PM. Set the operating times of the lamps accordingly, ideally using a light-controlled mode where they automatically…

The integrated approach to green precision prevention and control of major tea pests involves using core technologies such as narrow-band LED insect traps, yellow-red dual-color insect-attracting boards, and efficient sex pheromone lures to maintain target pest populations at a low level through long-term and efficient trapping. This is complemented by biological preventive measures, such as spraying inchworm virus preparations and releasing predatory mites, along with good agricultural practices to control pest populations. Finally, highly efficient, low water-soluble chemical pesticides are used as emergency measures in the event of large-scale pest outbreaks. In recent years, tea plant protection scientists have conducted extensive research on pest control techniques, developing effective green precision prevention and control technologies for tea pests. Below, we will use three of the most important pests in Chinese tea gardens—the gray inchworm, the tea inchworm, and the tea tiny green leafhopper—as examples. Integrated Approach to Green Precision Prevention and Control of Major Tea Pests I. Green Precision Prevention and Control Technology Model for Gray Inchworm and Tea Inchworm Note: “√” indicates the selected control technique at the corresponding time. The same applies below. 1. Core Key Technologies (1) Sex Pheromone Lures. Based on the severity of the previous year,…

For tea trees of different ages, the methods of mechanical pruning vary. For young tea trees, the primary focus is on shaping pruning; for mature tea trees, light and deep pruning are predominant; and for old tea trees, rejuvenation pruning and stump cutting are mainly conducted. Generally, pruning around the time of Jingzhe (Awakening of Insects) yields good results. However, from an economic perspective, young tea trees should be pruned at the beginning of Lichun (Start of Spring), while other tea trees should be pruned after tea picking. Light Pruning Light pruning effectively promotes the sprouting and growth of tea buds. It also increases the density of productive branches, widens the tree canopy, and creates a favorable picking surface. For mature tea trees, light pruning should be conducted every two years, timed when the upper part of the tea tree stops growing. In regions prone to frost damage, pruning can be done half a month to one month before the spring sprouting of tea buds. For famous tea gardens, light pruning can be conducted after spring tea picking. During light pruning, hedging shears or pruning machines are primarily used to trim off about 4 cm of foliage and branches from…

Tea plant frost damage refers to the freezing injury that occurs when tea plants are exposed to temperatures below 0°C during the winter dormancy period. The parts of the tea plant most susceptible to frost damage are often the current year's shoots, flower buds, young fruits, and root necks. When a young shoot is slightly damaged by frost, only the pith of the branch may change color. With moderate frost damage, the xylem changes color, and severe frost damage can result in damage to the phloem. When the cambium layer changes color, the branch loses its ability to recover. Damage to the root neck can lead to weakened or complete death of the tea plant. 1. How is tea plant frost damage classified? What are the main symptoms? Frost damage can be categorized based on the cause into snow frost, wind frost, and frost. (1) Snow Frost. Snow damage is a common form of frost damage to tea plants, particularly in high-latitude and high-altitude tea gardens. Tea plants suffering from snow damage show branches broken under the weight of accumulated snow, as well as freezing injury due to alternating freeze-thaw cycles during melting periods, causing uneven temperature changes. In severe…

The regional high-temperature drought that began in June 2022 caused varying degrees of damage to tea trees in some areas of our country. During the drought, we recommended not to carry out field operations such as picking, pruning, fertilizing, spraying pesticides, tilling, and weeding. However, with the recent drop in temperature and the arrival of autumn rains, the drought situation in the tea gardens has been significantly alleviated. With the onset of autumn, tea garden management needs to be stepped up, and the main task at this stage is to restore the vitality of the tea trees. Pruning Dead Branches It is now September, and the time for new shoots to grow on the tea trees is extremely limited; therefore, try to prune less and retain more in tea garden management. For those affected lightly, such as only partial leaf scorching, no treatment is needed, allowing the tea tree to self-repair. For severe cases where branches of the tea tree have died, prune off the withered, yellowed, and scorched branches and leaves to reduce water evaporation and the spread of necrotic tissues. Prune 1–2 cm below the dead parts to minimize energy consumption and transpiration in the tea tree. Light…

Since February 22, most areas of our province, except some tea regions in Qiandongnan and Qiannan such as Qiannanwest, have suffered from a sudden drop in temperature and extreme weather conditions of low temperature and freezing. Preliminary investigations indicate that tea trees in various tea regions have shown varying degrees of symptoms of low-temperature stress, with more severe impacts in higher altitude tea gardens, leading to reduced yields or delayed picking. To mitigate the effects of low temperatures and freezing on spring tea, experts from the Tea Special Task Force, Guizhou Tea Research Institute, Zunyi Comprehensive Test Station of the National Tea Industry Technology System, and Guizhou Province Tea Industry Technology System have jointly studied and proposed the following remedial measures: 1. Timely and Moderate Pruning After temperatures stabilize, prune according to the degree of freezing damage to the tea plants, removing frozen branches and leaves promptly. Pruning should be carried out after the temperature rises and will not cause further serious freezing damage. The depth of pruning should vary depending on the severity of the freeze, ideally cutting 2-3 cm deeper than the dead tissue. For lightly frozen tea plants where only the edges of mature leaves or winter…

The main goal is to improve the soil condition, increase nutrient availability, and create favorable conditions for tea plant growth, with tasks including soil cultivation, weeding, fertilization, and moisture retention. I. Garden Cultivation Reasonable cultivation is an important measure to improve the soil condition in tea gardens, which can enhance the micro-ecological environment of the soil and provide good conditions for the growth and development of tea plants, improving their vigor. 1. Shallow Cultivation and Weeding The purpose of shallow cultivation in tea gardens is to remove weeds, loosen the surface soil, and improve the micro-ecological environment of the surface soil layer. The depth of shallow cultivation is generally around 5 cm, and it can be combined with top-dressing and soil mounding. It's also essential to clear weeds and brambles around the tea garden promptly. For young tea gardens that are not yet closed row, cultivation should be done whenever weeds appear, requiring six to seven weedings per year. Since the root system of young tea gardens does not penetrate deeply in the planting year, shallow cultivation before the high-temperature season should be done early to avoid drought immediately after cultivation. For mature tea gardens, cultivation is divided into spring,…

There’s a folk saying: “When the hoe digs deep, there’s no lack of gold or silver.” Winter management of tea gardens is crucial for laying the groundwork for a bountiful harvest the following year, ensuring high-quality tea based on the “heaven, earth, human, and seed” foundation. The tea garden should be pruned into a cockscomb shape or uniformly flat, with the choice of heavy pruning or light trimming of side branches depending on the growth status of the garden. The appropriate height of shrub-like tea plants benefits both their growth and the ease of picking fresh leaves. After pruning, the old leaves can be buried through deep cultivation to ferment into organic fertilizer, which loosens the soil and promotes the growth of tea plants. Weeds along the edges or nearby can also be used to cover the garden, providing insulation, water retention, nutrient conservation, and support for microorganisms. Once these weeds decompose, they too become organic fertilizers for the tea garden. Many tea gardens in my hometown are terraced in ridges. For those with low embankments, adding a layer of turf and garden soil can help reduce soil erosion and nutrient loss, maintaining the vigorous vitality of the tea plants.…