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What are the control methods for tea anthracnose?
Tea anthracnose is a disease caused by fungi of the subphylum Deuteromycotina. The pathogen overwinters in diseased leaf tissue as mycelium and acervuli, and in the following spring under suitable conditions produces conidia. The conidia spread and proliferate with wind and rain, germinate in water droplets and invade the leaves,
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What are the methods for controlling tea plant pests and diseases
The meaning of deep processing of tea. Deep processing of tea refers to the use of fresh tea leaves or finished tea as raw materials, or the use of tea, tea factory rejects and by-products as raw materials, together with corresponding processing techniques and methods, to produce tea-containing products. Tea-containing products may be based on tea
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Control Methods for Red Spider Mites in Cotton Cultivation
Cotton leaf mite, also known as cotton red spider, fire dragon, fire spider. It belongs to the class Arachnida, order Acariformes, family Tetranychidae. The main species causing serious damage are the red leaf mite, Jiang leaf mite, and two-spotted spider mite. The individuals are small and highly reproductive, breeding more than 10 generations per year, and harm plants by piercing and sucking with adult mites and nymphs.
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Key Field Management Techniques for Cotton During the Squaring Stage
Currently, cotton in Shache County is about to enter the squaring stage. All townships must attach great importance to field management of cotton fields during the bud and boll stage, and specifically provide technical guidance focused on fertilizer and water management, intertillage and weeding, and chemical regulation. 1. Prepare for the first watering. Conventional irrigated land should be intertilled, weeded, and have the film removed before the first watering
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What are the key management techniques for cotton during the flowering and boll stage?
Cotton enters the flowering stage in early July, and the period from late August to early September when bolls open is the flowering and boll stage. The flowering and boll stage is the period of most vigorous cotton growth and development, and also the key period that determines yield. This year, due to higher temperatures, cotton growth and development has generally been faster, which
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How can the boll-setting rate be increased in cotton cultivation?
Types of square and boll shedding in cotton include physiological shedding, shedding caused by pests and diseases, and shedding caused by mechanical damage. As for the causes of physiological shedding: first, excessive application of fertilizer and water causes excessive vegetative growth, with nutrients consumed too heavily in the early stage and supply falling short of demand in the later stage; second, excessive planting density in the cotton field causes severe shading by branches and leaves, reducing light, weakening photosynthesis, and decreasing the nutrients produced; third, some cotton fields are deficient in boron, causing cotton to flower but not set fruit; fourth, high temperature and drought, insufficient fertilizer and water, or excessively high temperatures cause cotton pollen sterility; fifth, frequent rainy weather leads to poor pollination. As for pest and disease damage, inadequate control of cotton mirids, cotton bollworms, Fusarium wilt and Verticillium wilt can easily lead to massive square and boll shedding. As for mechanical damage, it is mainly caused by improper operation during field management. In addition, in the past two years, blind application of herbicides has occasionally caused square and boll shedding.
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Control Methods for Cotton Red Leaf and Stem Blight
Cotton red leaf and stem blight is a physiological disease and one of the main diseases of cotton in the middle and late stages. Over the years, it has occurred severely in sandy loam soil and poor cotton fields in our county. In drought years, especially after a long drought followed by rain or during continuous overcast and rainy weather, red leaf and stem blight breaks out, and cotton plants dry up and die.
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Foliar feeding of cotton works well, growers may want to give it a try
In the late growth stage of cotton, root activity gradually declines and absorption weakens, and applying boll fertilizer to the soil is too late to meet the nutrient needs of boll growth. At this time, spraying foliar fertilizer can supplement nutrition, and it has the effects of preventing premature aging, preventing disease, promoting large bolls, promoting early maturity,
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Control methods for the third-generation cotton bollworm in cotton
1. Manual egg collection and pest elimination. Since most third-generation cotton bollworms are found in the flowers and bolls of insect-resistant cotton, for insect-resistant cotton fields, withered flowers should be removed promptly and pests eliminated manually. For other cotton fields, manual egg collection and pest elimination can be carried out along with pruning and removal of side branches, and the remaining branches and withered leaves should be taken out of the field
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Four key techniques to grasp in the management of cotton during the boll-opening stage
Grasp the "four key techniques" in cotton management during the boll-opening stage (skillfully manage fertilizer and water, skillfully prune, skillfully pick rotten bolls, skillfully promote ripening). 1. Skillfully manage fertilizer and water to promote nutrient transport. First, foliar topdressing. For cotton fields where leaves lose green too early and show premature aging due to nutrient deficiency, spray 50-60 kg per mu of 1%-2% urea solution onto the leaves to extend the functional period of the leaves. For cotton fields that grow too vigorously and show late maturity with excessive vegetative growth, foliar spray 0.2% potassium dihydrogen phosphate solution or 0.3% superphosphate soaking liquid to promote nutrient transport and help improve boll opening. Second, prevent autumn drought.
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