Recently, due to the better economic benefits of loofah, farmers growing loofah in the greenhouse have gradually grown up. However, due to the special environmental factors in the greenhouse and due to the recent factors of clear, cloudy and haze, many kinds of factors have resulted in Diseases are extremely prone to occur, and sometimes even cause mixed diseases. This adds difficulty to the diagnosis of diseases, coupled with the repetitiveness and blindness of medications, and eventually leads to impaired production benefits. Here I would like to talk about the symptoms and prevention methods of several common diseases of loofah in the shed. Wang Cainong's friends learn from it and apply it to their actual production.
First, blight
The loofberry blight is mainly responsible for stem vines and can also damage leaves and fruits. The lesions on the stalks are oval or spindle-shaped, gray-brown, and sometimes the affected area overflows with amber colored gelatine, which eventually causes the stems to die. Leaf disease, leaf edge semicircle or "V" shape, brown or dark brown, slightly rimmed, lesions often rupture. Fruit lesions are nearly round or irregular, brown at the edges, and gray in the middle. Most of the flesh below the lesions are black and dry.
Control methods: 2% Wuyimycin plus 2.1% syringaresin can be used; or mancozeb and thiophanate-methyl can be used in combination.
Second, loofah disease
The loofah disease is also a fungal disease. In the early stage of disease, the chlorosis of the petiole first turns into a dark green, gradually shrinking, and the depression is quickly wilting. When the humidity is high, the surface grows sparsely white mold. In severe cases it can invade leaves, stems and melon strips.
Control methods: timely spraying of 72% cream urea manganese zinc (Ke Kang Ling) WP 600 times, 72% Ke Lu WP 600 times, or 25% Metalaxyl WP 1000 Doubling, or 18% mesalamine manganese zinc wettable powder 600 times, or 70% ethyl phosphorus manganese zinc wettable powder 500 times, every 7 days or so l times, depending on the condition control 2 or 3 times.
Third, loofah anthrax
Loofah anthracnose is a fungal disease. Its lesions are nearly round in shape and vary in diameter. They are about 2 cm in size. The temperature and humidity vary in color. When the temperature is high, the color is dark brown, and the temperature is low and humidity is large and light brown.
Control methods: spraying 75% thiophanate-methyl WP at 700-800 times, 75% chlorothalonil wettable powder 700-800 times, or 50% benomyl WP 1000-1500 times , Or 80% Anthraquinone Formamide WP 800 times, or 65% Zedexite WP 500 times, or 50% Iprodione WP 800X + 70% thiophanate WP 600 times the liquid, spraying 7 to 10 days 1 time, continuous control 4 to 5 times. Can also be used 25% carbon anthraquinone spray 800 ~ 1000 times, continuous 2 or 3 times.
Fourth, loofah burnt
1. Water Burning Symptoms: From the edge of the petal, water rot appears. In severe cases, the petals show symptoms of dripping, sometimes odor, or white mold.
Disease analysis: There may be odor but not hairy conditions may be bacterial soft rot, Changbai mold may be flower rot or M. blight, both cases occur in the case of high humidity and heavier.
Control methods: Bacterial soft rot can be sprayed with streptomycin, neomycin, and other agents. Flower rot and Bacillus diseases can be sprayed with foliar sprays such as Kelu, Kejia, Lei Duomi, or bactericides in boiled anthers. Isoflumuron, fludioxonil, and agricultural sulfate chains are added to the anthers. Medicinal herbs, etc., can effectively prevent pathogens from infecting flower organs.
2. Stigma head rot symptoms: black rot of the stigma of flowers, accompanied by flower rot.
Condition analysis: This is due to the lack of boron, calcium and other elements in the soil caused by the disease.
Control methods: foliar spray foliar fertilizers containing boron, calcium and other elements, such as calcium in the lid, calcium nitrate, etc., at the same time must pay attention to raising the roots, enhance the absorption capacity of the roots, can increase the application of humic acid, microbial fertilizers, You can also flush and apply fast absorption, or use thiophanate-methyl, hymexazol, and other agents to add a rooting agent and then irrigate the roots, each 0.25 kg.
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