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The role and application method of spraying paclobutrazol on rice
Paclobutrazol is a highly active plant growth retardant and broad-spectrum fungicide. Its internationally used code is pp333, and the code for the product made in China is MET. Its physiological effects on rice are mainly dwarfing, promoting tillering and improving stress resistance. Moreover, after transplanting, the seedlings turn green quickly, tiller early, the number of effective panicles increases, and the seed-setting rate and 1000-grain weight increase. It is a simple, easy and effective measure to increase yield. Experiments in various places in Liaoning in recent years have found that rice seedlings sprayed with paclobutrazol show the following changes compared with the control: 1. The seedlings become shorter. Spraying at the rice seedling stage
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Technical Points for Spraying Foliar Fertilizer on Cotton to Increase the Boll Setting Rate
This year, the summer-ripening crops in Haimen City were delayed in maturity due to climate effects, and after the summer harvest there was a continuous drought until mid-July, when it rained heavily for several consecutive days. This weather pattern of drought followed by rain was very unfavorable for the survival and growth of the already delayed transplanted cotton, and the growth process was delayed by about 10 days compared with normal years. To increase the formation speed of flower buds in the late stage of cotton and improve the boll setting rate, it is recommended to strengthen fertilizer management in the late stage by means of foliar spraying. 1. Combine pest control with proper timing of fertilizer application. Not every pest control treatment requires
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What are the precautions for spraying pesticides before fruit ripens
Pesticides that are prohibited include 1605, methyl 1605, fenitrothion, monocrotophos, methamidophos, trithion, omethoate, zinc phosphide, aluminum phosphide, carbofuran, asomate, chlordimeform, aldicarb, lindane and other pesticides. Dicofol also cannot be used on fruit trees because it contains high-residue DDT. Note the safety interval: the last spraying must be no less than 7 days before harvest for the following pesticides: 50% dichlorvos emulsifiable concentrate, 40% dimethoate emulsifiable concentrate, 50% carbendazim wettable powder, 50% iprodione wettable powder, 20% dinocap wettable
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What are the benefits of spraying mepiquat chloride on cotton?
Mepiquat chloride is a growth regulator specifically for cotton, with the effects of controlling excessive vegetative growth in cotton, regulating nutrient distribution, and increasing boll set. Entering September, cotton growth and development have reached the late boll-setting stage, so spraying an appropriate amount of mepiquat chloride, at 20 milliliters per mu, can reduce the occurrence of ineffective flower buds. After spraying on cotton, the leaves become greener and the leaf flesh thicker, which can effectively enhance cotton photosynthesis. After cotton is sprayed with mepiquat chloride, it can also make the fruiting branches in the upper part of the cotton plant grow sturdy, reducing the impact of pests such as cotton bollworm and tobacco cutworm. At the same time, in recent years due to climate
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Five key points to remember when spraying foliar fertilizer on cotton
Cotton leaves are the most important nutritional organs of the cotton plant, possessing four functions: photosynthesis, respiration, transpiration and absorption. By making use of their absorption and photosynthesis, targeted foliar spraying of fertilizer can promote steady plant growth, strengthen resistance to disease, pests, drought and premature aging, regulate vegetative and reproductive growth, and greatly increase yield and quality. 1. Spray type: scientifically choose the foliar fertilizer according to the cotton's growth vigor; for excessively vigorous cotton seedlings, spray a 0.3%-0.4% potassium dihydrogen phosphate solution or a 2% borax solution
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Reasonable spraying of brassin with Shuofeng 481 on cotton gives good results
Shuofeng 481 is a brassinolide product extracted from plant pollen and its derivatives. It comes from plants and acts on plants, with functions such as promoting cell division and elongation, promoting photosynthesis, delaying senescence and improving stress resistance, and combines multiple effects of auxin, gibberellin and cytokinin. Cotton is a crop with a relatively long growth period, and its growing season goes through a process from low temperature to high temperature and then to low temperature, and from high humidity to drought. Reasonably spraying brassin Shuofeng 481 throughout the whole growth period of cotton promotes cotton growth and improves its
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Which parts need attention when spraying cotton?
Practice has shown that for cotton to yield well, management is key. In the growth and management of cotton, spraying pesticide is an important part of that management. The pests that commonly occur on cotton include: aphids, red spider mites, mirids (plant bugs), pink bollworms, cotton bollworms, diamondback moths, and so on. These pests lay eggs and cause damage in different places, so when spraying you must pay attention to the location. During the cotton seedling stage, aphids, red spider mites and others cause damage on the underside of the cotton leaves, so when spraying pesticide, the spray solution must be applied to the underside of the leaves. The pink bollworm that occurs in the middle and late stages of cotton lays eggs on tender tips, tender stems and the underside of tender leaves, and after bolls form
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There is an art to spraying cotton, and methods matter even more in unfavorable weather
When spraying pesticides on cotton to control pests and diseases, unfavorable weather often affects spray quality, reduces control effectiveness, and can even cause pesticide damage. In response to this situation, in production practice I have adopted the following countermeasures according to different weather changes and achieved relatively good control results. Windy days On windy days, spraying pesticides causes uneven pesticide coverage on cotton plants, affecting control effectiveness. In response to this situation, pesticide varieties with systemic action and strong penetration can be selected. When spraying, the nozzle should be closer to the cotton plants to prevent the spray mist from being blown away by the wind and causing loss,
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August Is the Right Time for Foliar Potassium Spraying on Cotton
Because the content of available potassium (including water-soluble potassium and readily available potassium) in the soil decreases year by year, available potassium has become the number one demand in cotton nutritional physiology. When 30-40 jin of high-quality potassium fertilizer is applied in the base fertilizer, due to the consumption by cotton growth and development and leaching after heavy rain, by August the available potassium content in the soil will again drop to its original level. Entering August, as soil aeration deteriorates and the ground temperature drops after the cotton field closes its rows, the soil's potassium supply capacity weakens day by day. If potassium fertilizer cannot be supplemented in time, obvious potassium deficiency will appear
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Several foliar fertilizers suitable for spraying in the late growth stage of wheat
Spraying foliar fertilizers in the late stage of wheat cultivation can extend the functional period of canopy leaves, promote the transport of photosynthates to the grains, increase the number of filled grains, and raise the thousand-grain weight and quality, generally increasing yield by 5%-10%. The commonly used foliar fertilizers include the following: 1. Yemianbao contains humic acid and trace elements, which can enhance the stress resistance of wheat and supplement trace elements. Spray once each at the booting stage and after heading and flowering, 7-10 milliliters per mu each time, plus 2% urea, diluted in 30 kg of water for spraying. It can generally increase the thousand-grain weight by 1-2 grams and increase yield
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