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How to control cotton aphids in summer? These methods you need to master
Control of cotton aphids in summer. 1. Rotate the use of pesticides. Rotate the use of conventional field pesticides such as acetamiprid, imidacloprid and chlorpyrifos to reduce the likelihood of aphids developing resistance. Once aphids develop resistance to a certain chemical pesticide, even if you increase the number of applications and raise the pesticide concentration, you will not achieve the desired control effect. 2. Spray the affected parts evenly and thoroughly. Cotton is now in full bloom and the plants are tall, so when spraying you must be careful and thorough, focusing on spraying the undersides of the leaves in the middle and lower parts of the cotton plant, strictly preventing missed spraying and missed coverage, and truly
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How to prevent and treat bluetongue in cattle and sheep in summer? All the methods are here
Bluetongue is a viral infectious disease, and its main transmission vectors are Aedes mosquitoes and Culex mosquitoes. Cattle and sheep are susceptible to infection after being bitten. Clinical symptoms: in the early stage, the sick sheep's body temperature rises to 42°C, with listlessness, reduced appetite, lagging behind the flock, runny nose and drooling, edema of the upper lip, and the swelling can spread to the entire face and ears, with congestion and cyanosis of the oral mucosa. After fever, the epithelium of the oral mucosa, especially the lips, cheeks, and tongue, becomes eroded and ulcers develop. Blood seeps from the ulcer surface, and secondary infection causes necrosis of the mucosal epithelium, oral fetor,
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Effective prevention methods for fish surfacing in summer
I. Prediction of fish surfacing 1. In summer, strong sunlight and high temperatures during the day, and weather in the evening. Sudden thunderstorms or a south wind during the day with high water temperature, then a sudden turn to a north wind at night, causing the water temperature to drop rapidly. 2. Continuous overcast and rainy weather, low air pressure, muggy conditions, weak wind, and foggy weather. 3. Long periods of clear weather without rain, fish feeding vigorously, dense water color, and sudden weather changes. II. Rescue of fish surfacing, 1. Add fresh water Adding fresh water increases dissolved oxygen, improves water quality, and expands the range of activity for fish. 2. Turn on the aerator
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What to pay attention to when fishing in midsummer
1. Preparation before fishing: 1 day before fishing, appropriately reduce the amount of feed, and promptly remove obstacles such as tree branches (stumps) in and around the pond as well as grass residue pollution on the water surface, so that seining can proceed smoothly. 2. Fish at the right time: generally choose the early morning when the weather is relatively cool and fish activity is normal for fishing. Never fish when the weather is muggy and hot or when fish are gasping at the surface or under other abnormal conditions, so as to avoid unnecessary economic losses. 3. Standardize operations: choose nets with an appropriate mesh size, put the net in slowly and pull it out quickly, and minimize the number of hauls; never
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Grasp the prevention and control of scallion blight in summer
In the hot, humid and rainy seasons of spring and summer, epidemic scallion blight is prone to breaking out, causing scallion leaves to droop and wilt, or even rot, resulting in serious losses, so related prevention and control work must be done well. In the hot, humid and rainy seasons of summer, epidemic scallion blight is prone to breaking out, which can turn originally green scallions covered with yellow spots within a few days, then turning white, with leaves drooping and wilting, or even rotting, causing serious losses. Scallion blight mainly damages scallion leaves and flower stalks. In the early stage of infection, scallion leaves show indistinct pale greenish-white lesions, which after expansion become grayish-white spots, spreading along
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What are the taboos of growing bonsai in summer? Keep these five points firmly in mind
1. Avoid fertilizing. In the high temperatures of midsummer, the leaves lose water quickly. Fertilizing at this time will make the solute concentration of the trunk's cells lower than that of the surrounding environment, causing water in the plant cells to flow back into the soil, and the trunk will die of dehydration due to fertilizer damage. 2. Avoid drought. Watering when you remember and not watering when you forget, sometimes leaving it alone for several days in a row, and only quickly replenishing water once the leaves are found to be wilting, after which the leaves return to normal - this is a response of the trunk to adapt to the environment, but if this goes on for a long time, the excessively strong transpiration will eventually make the trunk difficult to recover from serious damage and die of dehydration. 3. Avoid water
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Eight preventive measures for bagged shiitake mushrooms to safely overwinter the summer, explained in detail
Based on our investigation and analysis of the summer-survival problems in large-scale bagged shiitake mushroom cultivation in Xixia over more than ten years, we have summarized a set of preventive measures for bagged shiitake mushrooms to safely get through the summer. They are presented below for reference. 1. Prevent contaminated spawn. There are many factors that can cause contamination in spawn, for example: incomplete sterilization of the substrate, lax disinfection during inoculation, introduction of pathogens during inoculation operations, air forced in through the cotton plug, respiration or damage during spawn transport, inoculation with contaminated spawn, and other such reasons. If contaminated spawn is used for production, it can harbor incalculable losses. 1.1
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Key Technical Points for Over-summering Management of Spring Bag-cultivated Shiitake Mushrooms
After the color change of spring bag-cultivated shiitake mushrooms is completed in mid-June, the high-temperature season begins. Shiitake mycelium is intolerant of high temperatures and drought; when the temperature exceeds 35°C and persists for 4 hours, the mycelium begins to die, or even self-lyse. The following are the key technical points for ensuring that mushroom bags safely over-summer in production, for the reference of mushroom growers: 1. Cooling. Use shade, ventilation, sprinkling water on the ground, hanging clean wet burlap pieces and other methods to lower the temperature, so that the substrate temperature does not exceed 30°C. On sunny summer days, close doors and windows from 9 o'clock until sunset to prevent hot air from entering the room. 2. Shading. Thicken the shading
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How to prevent heat stress in pigs? Summer nutritional measures are key
Heat stress refers to the sum of nonspecific physiological responses made by the body to a hot environment when it is in an extremely high-temperature environment. With the development of intensive high-density rearing methods, the decline in sow reproductive performance caused by heat stress has become increasingly serious. Heat stress causes severe body weight loss in sows, prolongs the interval from weaning to re-estrus, reduces the number of ovulations, lowers the conception rate, decreases embryo survival rate, reduces litter size, causes sows not to come into estrus, and may even shorten the service life of sows. In addition, during heat stress, lactating sows have low feed intake,
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Key Techniques for Growing Eggplant in Open Fields in Summer
Eggplant likes water. During the long drought with no rain in July, water must be added to keep the soil moist. When watering, dissolve the fertilizers ammonium bicarbonate, monoammonium phosphate and potassium sulfate in water, at concentrations of about 0.3%, 0.15% and 0.2% respectively. When irrigating through furrows, first fill a furrow with plenty of water, then evenly scatter the above fertilizers into the furrow to dissolve; the application rates per mu can be 15-30 kg, 10 kg and 10 kg respectively. If there is no water shortage, a hole can be dug in the middle of every four eggplant plants, and fully decomposed farmyard manure can be placed in the hole. Note that topdressing should be
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