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How to prevent and control freeze damage in tea plants? Taking active measures is key
Freeze damage is a major weather-related disaster affecting tea plants. After tea plants suffer freeze damage, it can range from affecting tea yield and quality in mild cases to causing severe leaf drop or even the death of the entire plant in severe cases. Freeze damage to tea plants can be divided by growth season into overwintering-period freeze damage and sprouting-period freeze damage, with the latter having the greatest impact on the yield and quality of that year's spring tea. Overwintering-period freeze damage prevention: during the growing season, strengthen fertilizer and cultivation management, pay attention to pest and disease prevention, implement a combination of harvesting and nurturing, and promote vigorous growth of tea plants so as to accumulate more organic matter and improve resistance to low temperatures. Autumn and winter
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How to prevent and control frost damage to young and newly planted tea trees? These seven methods must be mastered
1. Apply winter manure. Young and newly planted tea trees have relatively weak cold resistance, so before overwintering, a heavy application of winter manure should be combined with earthing up and mounding around the base. The fertilizer should mainly be farmyard manure, stable manure and biogas residue, which have a certain heat-preserving effect, along with a certain amount of cake fertilizer, superphosphate and potassium sulfate fertilizer. Winter manure can not only preserve heat and prevent freezing and enhance the tea trees' freeze resistance, but also lay a good foundation for the tea trees' growth the following year. 2. Earth up and mound around the base. Preventing the root crown from freezing is a key measure for protecting young and newly planted tea trees from frost. Therefore, before young and newly planted tea trees overwinter, they should
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Technical key points for restoring tea production after snow disaster and freezing damage to tea plants
This year, some tea regions across the country experienced severe weather such as heavy snow and low-temperature freezing that had not occurred in decades, causing tea branches to break, leaves to discolor and dry up, and branches to die, resulting in varying degrees of snow disaster and freezing damage. In order to restore tea production as quickly as possible and reduce the economic losses of tea farmers, the following technical key points are proposed according to the disaster conditions. 1. Pruning 1. Mild freezing damage (only leaves damaged): do not prune or lightly prune as appropriate. 2. Moderate freezing damage (production branches damaged) and severe freezing damage (framework branches damaged): prune when the boundary between the frozen-dead part and the healthy part is clear,
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What to Do About Freeze Damage to Tea Plants? Detailed Remedial Measures
From February 15 to 18, we investigated the freeze damage to tea plants in Tangshi and Pengshi in Zixing, the Fruit and Tea Research Institute, and the Huatang Tea Plantation in Chenzhou. The survey found that tea gardens with good fertilization and cultivation had a thick layer of green leaves on the tea plants and strong tree vigor, and suffered relatively mild damage; the opposite was true for the rest. The degree of damage also differed among varieties. Among them, the early-growing varieties Fuyun No. 6, Fuding Dahao, and Baihaozao suffered heavier damage, while the mid-to-late-growing Bixiangzao, Zhuyeqi, Maoxie, and population varieties suffered lighter damage. Overall, tea plants at all survey points suffered freeze damage, with the more severely affected
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What effects does waterlogging damage have on the growth and development of tea plants?
Tea plants require moist air conditions, but they are not tolerant of excessively wet soil. When there is too much soil moisture or even standing water on the ground, the respiration of the root system is impeded, and its ability to absorb water and nutrients is reduced, seriously affecting the growth of buds and leaves and lowering the yield and quality of fresh leaves. In severe cases, the roots suffocate, anaerobic microorganisms become active, and organic acids are produced that poison the tea plant roots, causing peeling, necrosis and rot. The manifestations of tea plants suffering from waterlogging damage are: few absorbing roots, short and small lateral roots, a shallow root layer, and some lateral roots extending horizontally rather than downward, or even growing upward. Severely affected
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Damage Caused by the Rice Stem Maggot to Hybrid Rice Seed Production and Its Control Methods
The rice stem maggot (Chlorops oryzae Matsumura) is mainly distributed in China in Heilongjiang, Zhejiang, Jiangxi, Hunan, Hubei, Guangdong, Guangxi, Yunnan, Guizhou, Sichuan, Chongqing and other provinces and areas. In recent years it has become one of the main insect pests in rice production in the hilly and mountainous areas of Chongqing, and the losses it causes have exceeded those of some important pests such as stem borers. In hybrid rice seed production, the occurrence of the rice stem maggot seriously affects the development process of rice, thus leading to poor flowering-date synchronization between the male and female parents and affecting seed production
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A Detailed Explanation of the Effects of Low-Temperature Cold Damage on Rice and Defensive Measures
Rice cold damage refers to the disaster in which rice is affected by low temperatures below the minimum critical temperature for growth, resulting in the inability of rice to grow and develop normally and thus causing reduced yields. Depending on the period of damage, it can be divided into delayed-type cold damage, sterility-type cold damage, and mixed-type cold damage. I. Types and Characteristics of Rice Cold Damage 1. Delayed-type cold damage: During the vegetative growth period of rice, and sometimes also during the reproductive growth period, the plant is harmed by relatively low temperatures over a longer period, which weakens the physiological activity of the rice plant, delays its development, postpones heading and flowering, and prevents full grain filling and
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How to defend tea plants against heat damage? A detailed explanation of practical technical measures
Tea plant heat damage refers to the meteorological disaster that, under long-term high-temperature and dry climate conditions, causes tea yield reduction, stunted tea plant growth, or plant death. The tea plant originated in the subtropics and is a perennial evergreen plant, with the habit of preferring warmth and humidity, tolerating shade, and fearing drought. When there is prolonged high temperature and severe drought, scorching sun, low rainfall, and relative air humidity below 50%, leaf transpiration intensifies, and the water absorbed by the root system cannot compensate for the consumption of the aboveground parts, thus causing the tea plant to wither, drop leaves, and even die. To prevent tea plant heat damage, in addition to selecting heat-resistant tea
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What remedial measures should be taken after tea plants suffer frost damage?
1. All the tender buds and tender branches on the surface of the canopy that have withered and scorched due to frost damage must be pruned off, and the specific pruning depth should be determined according to the degree of frost damage. 2. The pruning time is best set between February 15 and March 5, that is, the period between Yushui and Jingzhe. 3. Timely topdressing: after the frost-damaged tender buds and tender branches are pruned off, the tea plant will consume a great deal of nutrients, and timely topdressing can prompt the tea plant to recover growth quickly. Generally, for conventional tea gardens, 20-30 kg of urea per mu can be broadcast on a sunny day; for organic tea gardens, 1-2 applications of mineral foliar fertilizer and organic foliar fertilizer can be sprayed 10-20 days before the spring tea harvest.
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Occurrence and Damage Characteristics of the Bridgeworm Pest on Lingzhi
The bridgeworm (Noctuidea) belongs to the family Geometridae. The lingzhi bridgeworm of this family (name to be determined) is an important pest damaging lingzhi. 1. Morphology and habits: The adult is 12 mm long with a wingspan of 25-28 mm, a small grayish-black moth. The antennae are filiform; the forewings are triangular with 8 black spots along the outer margin and one larger black spot in the middle of the costal margin; the hindwings are grayish-white. The egg is flat and round, 0.6-0.7 mm long and 0.4-0.5 mm wide, milky white initially and grayish-green before hatching. The mature larva is 22-25 mm long,
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