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What are the control methods for leaf spot disease in geraniums?
Control of leaf spot disease in geraniums: 1. For small-scale plantings, remove diseased leaves by hand and burn them in a centralized manner. 2. Improve the growing environment. In areas with severe outbreaks, practice crop rotation, avoid planting too densely so as to allow good ventilation and light penetration, and drain standing water promptly. 3. During the disease period, spray with 100 to 150 times diluted Bordeaux mixture or 80% Captan wettable powder at 500 times dilution; you can also spray a mixture of 50% Thiophanate-methyl at 1000 times dilution and 80% Captan at 500 times dilution, or spray a 45% Chlorothalonil and carbendazim mixed suspension concentrate at 1000 times dilution, which gives better results than a single fungicide.
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Causes and Control Methods of Potato Green Skin Disorder
[Disease Diagnosis] It mainly occurs on tubers in the late growth stage or during storage. In the field, after some tubers arch out of the soil surface and are exposed to sunlight, the surface tissue turns from yellow to green. The area of greening varies depending on the size of the exposed area. The green tissue can extend into the interior of the tuber and is often accompanied by purple pigment deposition. During storage, when tubers are exposed to natural light, the surface also turns green, sometimes even affecting deep tissues. Usually this greening will not recover by returning the tubers to dark storage. [Cause] This disease is physiological
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Identification and Control Methods for the Potato Ladybird Beetle
The potato ladybird beetle (Henosepilachna vigintioctomaculata Motschulsky) belongs to the order Coleoptera, family Coccinellidae. It is widely distributed in northern China. It mainly damages potatoes, eggplants, Chinese cabbage, rapeseed, as well as beans, cucurbits and so on. [Field identification] Both adults and larvae feed on leaves, gnawing the epidermis and mesophyll on one side, creating many net-like pits. The adult is about 8 mm long and hemispherical. The body dorsum and elytra are yellowish-brown; the center of the pronotum
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What are the prevention and control methods for fish gyrodactyliasis?
Pathogen and prevalence The pathogens of fish gyrodactyliasis are Gyrodactylus medius, Gyrodactylus bacterialis, and Gyrodactylus elegans. This disease is mainly prevalent in spring and from late autumn to early winter, and excessive stocking density in ponds is the main cause of fish outbreaks. Symptoms Sick fish have a layer of grayish-white mucus on the skin and are thin and weak. In the early stage of the disease, they are extremely restless, sometimes swimming wildly, sometimes swimming sharply on their side. They rub against water grasses or the edges of tanks, trying to get rid of the infestation of the pathogens. Subsequently, appetite decreases, swimming becomes slow, and eventually they die. Prevention and control methods 1. When
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Detailed Explanation of the Causes of Chicken Pecking at the Trough and the Control Methods
I. Causes 1. Excessive stocking density. When the stocking density is too high and there are not enough water troughs and feed troughs, the flock competes for water and feed, causing some chickens to suffer nutritional deficiencies in their bodies, making them prone to pecking vice. 2. Improper regulation of the chicken house environment. If the air inside the chicken house is foul and harmful gases exceed the standard, the flock will become restless and irritable and develop pecking vice; uneven temperature, with sudden cold and heat, will cause great stress to the flock and lead to pecking vice. 3. Unreasonable dietary nutrition. If the animal protein content in the diet is insufficient, or the amino acids are imbalanced, the flock cannot effectively
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What to Do About Tail Biting in Pigs? Detailed Introduction to Prevention and Control Methods
For pig herds with mild tail biting, white liquor or gasoline diluted with water can be sprayed on the herd 1-2 times, which can effectively control the problem; for bitten pigs, the wounds should be promptly cleaned with potassium permanganate solution and coated with iodine tincture to prevent wound infection; for severe bites, antibiotics can be used for treatment.
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Occurrence and Integrated Control Methods of Sheep Nasal Bot Fly
Cause: Sheep nasal bot fly is a disease caused by the larvae of the sheep nasal bot fly parasitizing the nasal cavity of sheep, mainly affecting sheep (Ovis aries). The adult sheep nasal bot fly directly deposits larvae, and the larvae become adults after passing through the pupal stage. Adult sheep nasal bot flies appear from May to September each year. After mating, the male fly dies, and the female fly rests until the larvae inside her body develop before flying and becoming active, depositing maggots in the nostrils of sheep to breed larvae. The first-stage larvae attach to the nasal mucosa of sheep and gradually migrate inward, molting into second-stage larvae in the nasal cavity and frontal sinuses, and by the spring of the following year, they develop into mature third-stage larvae.
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Control Methods and Technical Key Points for Soybean Bacterial Blight
Soybean bacterial blight is a disease that occurs commonly in soybean-growing regions, reducing the percentage of fully filled seeds, lowering the 100-seed weight, and decreasing both quality and yield. Leaf lesions are initially round, brown to dark brown; as the lesions enlarge, the center turns black, the lesions do not appear raised, and diseased leaves drop easily. Lesions on stems and pods are brown and round, later becoming spindle-shaped. The seed surface is coated with a layer of bacterial slime, often appearing at one end of the seed, and its shape closely resembles a "frog eye." Diseased seeds are shrunken, and the pathogen overwinters on diseased leaves, stems, pods and seeds.
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Symptoms and Control Methods of Anthracnose in the Medicinal Plant Panax notoginseng (Tianqi)
Symptoms The disease can occur at the seedling stage and the adult plant stage. Infection at the seedling stage causes damping-off or top blight. At the adult plant stage, it mainly affects leaves, petioles, stems, flowers and fruits. Infected leaves initially develop circular or nearly circular yellow-brown spots with a distinct reddish-brown margin; later the diseased areas tend to rupture and perforate. Infected petioles and stems develop spindle-shaped, yellow-brown, sunken spots, causing the petioles to coil or the stems to twist. Infection of the stem base causes lodging of adult plants or rot of the rhizome. Infection of pedicels and flower discs leads to drying of flowers and seeds. Infected fruits also develop nearly circular yellow sunken spots, causing the fruits to turn brown and rot.
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What are the pest and disease control methods for the Chinese medicinal herb Panax notoginseng?
1. Diseases 1.1 Black spot disease occurs mostly in the high-temperature, high-humidity season from June to July, causing plants to twist and break and die. The control method is to adjust the shade shed's light transmittance to below 20%, and spray with 1.5% polyoxin 150-fold solution or 70% chlorothalonil wettable powder 600-800-fold solution. 1.2 Phytophthora blight is a devastating disease of Panax notoginseng at the seedling stage. It occurs mostly from June to July, damaging leaves and petioles. The control method is to strengthen field management, reduce temperature and humidity; promptly remove residues and burn them in a centralized manner, and spray with 65% zineb wettable powder 500-fold solution for treatment.
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