Pesticides

As spring returns to the earth, early spring green tea is being harvested in many places, and tea lovers can't wait to buy and taste the new batches. So why is early spring green tea considered good? 1. As temperatures gradually rise in spring, rainfall is relatively abundant. Additionally, after a period of rest during winter, tea plants produce lush shoots with vibrant green color, soft leaves, and a rich content of natural compounds. 2. With relatively low spring temperatures, there's an increased synthesis and accumulation of nitrogen-containing compounds. At the beginning of spring, amino acids gather in large quantities at the tips of young shoots, which results in a strong aroma and fresh, pleasant taste that also offers health benefits. 3. The low temperatures in spring slow down metabolism and reduce the presence of tea polyphenols, anthocyanins, and alcohols, aldehydes, and acids, thus making the tea less bitter. 4. Due to the low temperatures and fewer pests and diseases, farmers generally do not use pesticides on early spring teas, ensuring they are minimally contaminated with chemicals. While early spring tea is excellent, please be aware of the following precautions: 1. Although early spring tea is delicious, don't rush to…

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…

For Pu'er tea, many tea enthusiasts have the concept of "drink old tea, store new tea." So, how can we determine if a new tea has collection value? First, making a good tea requires many factors. The most critical are the following three aspects: What kind of new tea has the greatest collection value? I. Raw Materials Without good raw materials, no matter how skillful the process is or how correctly it's stored later, the tea cannot develop a good taste during its transformation later on. 1. Tea Variety A good tea is cultivated by people and is also the result of natural selection over thousands of years. Among various tea varieties, the sexual reproduction-based large-leaf type native to Yunnan is best suited for making Pu'er tea. 2. Growing Environment A suitable environment for growing tea trees. This includes appropriate altitude, proper sunlight duration and intensity, well-spaced planting, appropriate intercropping, no need for pesticides due to biodiversity that prevents the occurrence and development of diseases and pests, etc. 3. Picking Parts and Time Different parts of the tea leaves such as the bud tip, leaf, stalk, and yellow leaf play different roles in the post-fermentation process and have different effects…

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,…

Main pests in autumn tea gardens and their control measures. The weather gradually cools down in September, with vigorous growth of tea plants and abundant food for pests, which is very conducive to the occurrence of pests such as mites and tea green leafhoppers. If not controlled in time, they can easily cause outbreaks that severely impact the yield and quality of next year's spring tea. The main pests occurring currently and their control measures are as follows: I. Tea Orange Spider Mite This pest is small in size, with adult and juvenile mites piercing and sucking tea plant sap. When mite numbers are low, the damage is not obvious and hard to detect. However, when mite numbers increase, the veins of affected leaves turn red, the leaves lose their green color and luster. Severe infestations result in a brown rust appearance on the underside of the leaves, withered and dried shoots and leaves, and a scorched appearance, and may even cause defoliation. Some tea gardens have experienced heavy infestations recently. Without effective control measures, mite populations will continue to rise. The following measures are recommended for control: 1. Strengthen garden management by removing weeds and fallen leaves. Timely picking…

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…

To strengthen the management of tea gardens during summer and autumn and ensure production of teas during these seasons as well as the following spring, the Department of Plant Industry Management of the Ministry of Agriculture and Rural Affairs, together with the National Agricultural Technology Extension Service Center, the Expert Advisory Group on Tea of the Ministry of Agriculture and Rural Affairs, and the National Tea Industry Technology System, have proposed technical guidelines for tea production in summer and autumn 2024. Strengthen Fertilization Management of Tea Gardens 1. Top-Dressing Fertilization in Tea Gardens (a) Root Fertilization: Top-dressing fertilization for summer tea should be carried out after the spring tea harvest, and for autumn tea after the summer tea harvest. For tea gardens in production, about 15-20 kg of urea or 20-30 kg of specialized compound fertilizer for tea (with a formula of 18:8:12 N:P2O5:K2O) is generally applied per mu, with higher-yielding gardens receiving slightly more. Image Source: Anji White Tea Website Fertilizer should be applied in trenches dug vertically below the edge of the tree canopy, with a depth of about 10-15 cm. Broadcasting of fertilizer is prohibited. In young tea gardens (1-2 years old), fertilizer should be applied 5-10…