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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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Seven Tips for Improving the Effectiveness of Oral Fish Medication
1. Prevention is the key. For fish living in water, disease is hidden and hard to detect. Once dead fish are found, the losses are great, and treating fish diseases is relatively difficult. Therefore, the guiding principle of "prevent disease before it occurs, treat it early when it does, and prioritize prevention over treatment" should be actively implemented, and the concept of focusing on preventive medication should be established. 2. Cleverly combine Chinese and Western medicines. Chinese herbal medicines have a long duration of efficacy in treating fish diseases, few side effects, and low prevention and treatment costs; Western medicines are characterized by rapid efficacy and high cost. Practice has proven that mixing certain Western medicines into effective Chinese herbal medicines can both rapidly improve efficacy and reduce costs.
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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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Several Practical Ways to Improve the Effectiveness of Fish Medications
1. Improve the binder. The binder must be strongly adhesive, otherwise the medication is easily lost in the water. Standard wheat flour is a good binder material. For swallowing fish, it is best to make pellet medicated bait or ball-shaped medicated bait. 2. Add a feeding attractant. Fish have a sensitive sense of smell; even if 1 gram of alanine is dissolved in 1000 tons of water, fish can still detect it. For example, grinding the strongly aromatic Chinese herbs star anise and Angelica dahurica into fine powder as a feeding attractant, mixing it into fish medication at a ratio of 10%-20%, or adding
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What to Do About Root Rot in Golden Privet? A Detailed Guide to Effective Prevention and Control Methods
To prevent root rot, pay attention to the following points: 1. Do a good job of disinfecting the seedbed. Avoid using land that has previously been sown or used for cuttings of similar seedlings as a seedbed. 2. Do a good job of disinfecting the cuttings. After cuttings are inserted, the entire seedbed should be disinfected; generally, the branches can be soaked directly in thiophanate or carbendazim solution, which gives a clear disinfection effect. 3. Pay attention to rooting time. Golden privet is a plant of the Oleaceae family that roots very easily; its cutting method can follow that used for golden-leaf privet, with attention to management and timely spraying of medicine to prevent disease. 4. Open
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What effect does light have on the growth and health of pigs
Lighting in pig houses can be divided into natural lighting and artificial lighting according to the light source. Natural lighting refers to direct sunlight and scattered light entering the pig house through light-transmitting structures such as doors and windows for illumination. In the solar spectrum, visible light accounts for 50%, and most of the remaining 50% is infrared light, with a small amount being ultraviolet light. Natural lighting in a pig house is generally expressed as the ratio of the total light-transmitting area of the pig house to the floor area inside the house, which is called the lighting coefficient. Artificial lighting uses artificial light sources (incandescent lamps or fluorescent lamps, etc.) for illumination. In the spectrum of incandescent lamps, infrared accounts for 60%
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The Effects of Different Temperatures on Pigs and Countermeasures
I. Effects of ambient temperature on pigs. 1. Effects on pig health. In a continuously high-temperature environment, the resistance of pigs is significantly reduced, the body heat balance is disrupted, body temperature rises, coma occurs, heat stroke develops, and in severe cases death results. In a low-temperature environment, in order to conserve heat, pigs constrict their peripheral blood vessels, causing local frostbite. Low temperatures cause respiratory diseases and also often lead to rheumatism, arthritis and other diseases. Low temperatures have a greater impact on piglets; according to statistics, half of the dead piglets were frozen to death or died from cold-related diseases.
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Preliminary Report on the Effects of Applying Kebao Plant Super-Vitamin to Cotton
1 Materials and Methods 1.1 Test material Kebao Plant Super-Vitamin, produced and supplied by Zhejiang Kebao Biotechnology Co., Ltd.; the test variety was Xiangza Cotton No. 2. 1.2 Test site Dasha Lake Farm, Honghu City, Hubei Province. The soil texture was sandy loam; spring plowing and spring irrigation were carried out, and before land preparation, 300 kg/hm2 of 52% diammonium phosphate and 75 kg/hm2 of 46% urea were broadcast.
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What to do about false rooting in rose cuttings? Teach you effective prevention methods
Autumn is a great time for softwood cuttings of roses. At present, cuttings are still the main method of propagating roses. It can not only maintain the characteristics of superior rose varieties, but also has a high propagation coefficient, a short production cycle, low input and quick results, and is still adopted by many flower growers. However, in the process of rose cuttings, "false rooting" often occurs due to lack of experience or improper methods. That is to say, 5-10 days after the rose is cut, the axillary buds on the cutting have already sprouted or produced shoots and leaves, and it looks as if it has taken root, but soon it wilts and dies. To avoid rose cut
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