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How to effectively prevent and control cotton angular leaf spot
Cotton angular leaf spot is a bacterial disease. Cotton can be affected from the cotyledon stage to the mature plant stage. After infection, dark green small spots first appear on the underside of the leaves, and later the spots gradually expand, restricted by the leaf veins to form polygonal oil-soaked lesions. When the bacterial fluid is moist, it is a yellowish-brown sticky substance, and after drying it becomes a white scab-like substance. In severe cases, it can cause the leaves to dry up and fall off. If diseased leaves are held up to the light, the lesion areas look like oiled paper. The causes are, first, continuous cropping on the same land, with the disease developing from bacteria carried by diseased residues in the soil; second, poor light, high humidity and high temperature, with damaged cotton branches and leaves, which favors
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How to effectively control the Schisandra leaf-rolling worm
It occurs from July to August. The larvae are initially white, later turning green. Young larvae bite and feed on the leaf mesophyll; after the 3rd instar they roll leaves and feed, affecting fruit development. Control methods: (1) Before the larvae roll the leaves, spray with 80% trichlorfon at 1000-1500 times dilution. (2) After the leaves are rolled, spray with 40% dimethoate emulsifiable concentrate at 1000-1500 times dilution. (3) Spray with 50% phoxim at 1500 times dilution. (4) Spray with 50% phosphamidon emulsifiable concentrate at 2000 times dilution. (5) Before and after the larvae roll the leaves, they can also be caught by hand.
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Rice midge harms rice, how can it be controlled effectively?
Rice midge, commonly known as red worm or red thread worm, damages the young roots and young shoots of rice with its larvae, causing floating seedlings, and feeds on the embryo and endosperm of ungerminated seeds, preventing the seeds from germinating. Rice seedling fields and direct-seeded fields suffer severe damage. The adult is a small moth, with wings shorter than the body; when resting, the front legs are raised and swing up and down. The larvae are red or pale yellow, with a limb-like protrusion on the ventral side of the prothorax. It occurs 2-3 generations per year, and the first generation damages rice. It overwinters as nymphs and adults in weeds. Adults appear in early May of the second year, and lay eggs in late May.
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Strengthen pig drinking water management to effectively improve pig farming benefits
Strengthen pig drinking water management, supply sufficient drinking water according to the physiological characteristics of pigs, and meet the water needs of growth and development, especially for fattening pigs, water management should be strengthened even more. The specific methods are: 1. Set up drinking troughs. In order to meet the drinking water needs of pigs and avoid all the disadvantages caused by insufficient drinking water, pig farmers should give pigs drinking water at least 4 to 5 times a day. It is best to set up dedicated drinking troughs in the pig house or activity yard so that pigs can drink freely and meet the water needs of pig growth and development. 2. According to the physiological characteristics of pigs
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Secondary bagging of edible fungi can effectively prevent infection
In the production of shiitake mushrooms (Lentinula edodes), lion's mane mushrooms (Hericium erinaceus), wood ear mushrooms (Auricularia heimuer) and others, the secondary bagging technique is applied (that is, when the mushroom logs come out of the sterilization chamber, an extra layer of thin film bag is put on, so that the mushroom logs inside the bag do not come into direct contact with the ambient air), which effectively solves the problem of cross-infection during the log production process and keeps the strain survival rate above 97%. The technique is described below: 1. Preparation of the outer bag The outer bag should preferably be a low-density polyethylene film bag with a circumference 2 cm larger than the inner bag, a length 5 cm longer than the inner bag, and a thickness of 0.2 silk, with one end tied and sealed for later use.
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How can cold-water fish farming effectively prevent and control pathogens?
1. Establish a strict quarantine system. When introducing and exporting fish eggs and fry, all farming areas must strictly carry out quarantine to prevent and control the occurrence of diseases. Farms should set up quarantine ponds to isolate introduced fish species; only after the introduced fish are confirmed free of important diseases may they be temporarily reared. Quarantine ponds are generally located at the end of the drainage ditch. The length of quarantine time should be determined by the transport season, water temperature, and the characteristics of the disease. When the average temperature is not lower than 12°C, 20 days are required; when the water temperature is higher, it can be shortened, which is determined on the basis that the lower the temperature, the longer the incubation period. If
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Clever foliar feeding for tea plants effectively improves quality
If famous tea is contaminated, especially export products, its output value and reputation will both suffer severe setbacks. To improve tea quality and yield, in addition to measures such as planting green manure in tea gardens, mulching to retain moisture, applying sufficient farmyard manure after each harvest, and improving tea-processing techniques, foliar fertilizer should also be used cleverly. This is a good method that uses little fertilizer, takes effect quickly and gives high returns, generally increasing yield by more than 20%-30%. The techniques are: Fertilization timing. When the new shoots of each round of spring, summer and autumn tea flush grow out to the initial unfolding of one bud and one leaf, choose a windless sunny morning, evening
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How to effectively treat acute rheumatism in pigs
To prevent acute rheumatism in pigs, feeding management must be strengthened, strictly guarding against invasion by wind, cold and dampness, improving ventilation, and promptly removing manure, urine, sludge and muddy water from the pen to keep the floor dry and clean. Add thicker bedding, protect against cold and keep warm, and prevent bedsores. Treatment: (1) For each pig, use 20 to 50 milliliters of 10 percent sodium salicylate injection or compound sodium salicylate injection, intramuscularly, once a day, for 2 to 3 consecutive days. (2) For each pig, use 5 to 10 milliliters of compound aminopyrine injection, intramuscularly, once a day, for 2 to 3 consecutive days. (3) For each
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How can sheep bot fly larvae disease be treated effectively?
Sheep bot fly larvae disease mainly affects sheep and goats. This disease mainly occurs from early autumn to mid-autumn. After infection, the sheep become restless, showing symptoms such as shaking the head, running around, and lowering the head to press the tip of the nose against the ground; some hide their heads under the bellies of other sheep. Treatment: (1) In early autumn, when adult flies fly and deposit larvae, an insecticidal ointment can be applied to the sheep's nose and nostrils once every 7 days to prevent adult flies from depositing larvae. (2) Spray 60 ml of 3% Lysol solution into the sheep's nostrils once a day for 7 consecutive days; the curative effect is excellent.
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How to effectively prevent and control common pests and diseases of Euonymus japonicus?
Euonymus japonicus, as an evergreen shrub, is one of the most commonly used landscaping plants in urban streets, squares, parks, institutional courtyards, and residential green spaces. Due to the large differences in its growing environment and relatively extensive management measures, the occurrence and damage of its pests and diseases are also relatively severe, seriously affecting the urban landscaping landscape. Investigating and studying the occurrence characteristics of the main pests and diseases of Euonymus japonicus can help formulate and implement prevention and control measures according to local conditions, achieving the goal of controlling damage and beautifying the environment. 1. Occurrence characteristics of main pests and diseases (1) Euonymus japonicus powdery mildew. Powdery mildew is a common
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