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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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What to Do About Low Fruit Set in Plums? Cause Analysis and Methods to Improve It
1. Regulating tree vigor For excessively vigorous trees, promptly remove buds and prune upright branches, and promptly open up the branch angles; alternatively, in autumn or spring apply 3-5 g of 15% paclobutrazol per tree, or spray 150-200 times diluted paclobutrazol or PBO after petal fall. For trees that are too weak, apply base fertilizer after harvest, and promptly apply topdressing and foliar fertilizer during the growing season.
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Detailed Prevention and Control Methods for Low Fruit Set Rate in Jujube Trees
1. Pay attention to shaping and pruning. Because the bud types and growth and fruiting habits of jujube trees differ from those of other fruit trees, they are not sensitive to pruning responses. Therefore, pruning must follow the tree's natural tendency and shape the tree according to the branches, and pruning should be light. Winter pruning and summer pruning should be combined so that the main branches are reasonably distributed with clear layers. Select
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Reasons for Low Fruit Set in Muskmelon and Methods to Improve It
I. Reasons Why Plants Are Prone to Poor Fruit Set 1. Excessive vegetative growth or weak, spindly plants. During the growing period of muskmelon, applying too much nitrogen fertilizer or cultivating in a protected environment with high temperature and high humidity and poor ventilation prevents vegetative growth and reproductive growth from being coordinated, often resulting in excessive vegetative growth or weak, spindly plants.
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How to Grow Peanut Sprouts in Substrate Cultivation? A Detailed Guide to the Method
1. Production Site, Equipment and Substrate Materials. Production can be carried out in open fields or greenhouses where the temperature is maintained at 12°C to 30°C and the soil pH is 5.5 to 7.5. Any water-leaking container can be used, and the substrate can be soil, sand, sawdust, etc. 2. Seed Selection. For producing peanut sprouts, choose
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How to reasonably determine nitrogen fertilizer application rates in precision quantitative rice cultivation
The quantification of nitrogen needs to consider the fertilizer requirements of high-yield rice, the pattern of soil nitrogen supply, fertilizer characteristics and the current-season utilization rate, as well as various changes during the growth period, and includes two parts: total nitrogen quantification and nitrogen fertilizer application methods. Determination of total nitrogen amount: obtained through soil testing and fertilizer recommendation trials
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Integrated Control Methods and Techniques for Rice Stem Borer Damage
Integrated control technology for stem borer damage refers to addressing the adverse conditions of residual toxicity, resistance, and resurgence caused by long-term pesticide application against rice stem borers, minimizing harm to humans and environmental pollution while earnestly implementing the plant protection policy of "prevention first, integrated control," persisting in carrying out pest and disease forecasting
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Integrated Control of Diseases, Pests and Weeds in Pollution-Free Sweet Potato Cultivation
(1) Carefully select seed tubers. Choose tuber pieces free of disease, insects and injuries as seed tubers. (2) Chemical treatment of seed tubers (omitted). (3) Storage cellar management. Store the seed tubers in a sterile cellar; preferably use a new cellar. If an old cellar is used, first scrape off the cellar walls, then fumigate with 15 g of sulfur per sq m. After the tubers
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Experience Sharing on Integrated Rice and Crayfish Farming
With the continuous development of China's aquaculture industry, crayfish farming is now very common. There are many methods for farming crayfish in China, and different farmers adopt different methods, so farmers can exchange and learn from one another. Crayfish
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Experience Sharing on Integrated Pest Management for Grapes
1 Dormant period control techniques (November to March). During this period, the pests that were rampant and causing damage stop their activity, and various pests enter the overwintering state in different insect forms and ways, and their overwintering sites are relatively hidden. 1.1 Clearing the orchard. After the grapes shed their leaves, promptly clear away the fallen leaves, dead branches and weeds,
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