Cucumber scab, also known as scab, is a devastating disease in plastic greenhouses and greenhouse cucumbers, and is therefore listed as a quarantine subject. Early prevention is the most critical. 1. Symptoms Cucumber leaves, stems, melons, and growing points can be damaged. When the leaves are sick, round lesions appear, 1-2 mm in diameter, about 5 mm in size, light yellow, thin and brittle, and easy to perforate and fall off. When the young leaves are sick, the lesions often show star-shaped cracks; when the stems are sick The lesions were round or spindle-shaped, pale yellow-brown, slightly sunken, and there was a jelly overflow; the young larvae were sick, and when they first appeared, they were faded green spots, and they overflowed with a transparent gel, and soon they turned yellow-brown. The young melons stop growing after suffering from the diseased part to form malformed melons. In severe cases, the melon strips are rotted; when the growing point is damaged, wilting becomes brown, and 2-3 days rot. 2, the incidence of conditions cucumber scab is a fungal disease, caused by the cucumber sore spoilage. Seed carriers are the main route for long-distance transmission of the disease. At the same time, germs can also be attached to the building materials in the greenhouse. The disease can be caused when it encounters suitable conditions. After onset, germs were transmitted by conidia through airflow, rainwater, and farmer operations. Appropriate disease temperature is 18-22 °C, relative humidity more than 90%. Therefore, the humidity in the greenhouse, the temperature is low, the plants are too dense, the vegetation is closed, the continuous continuous rain (fog, snow), low light, continuous cropping, etc. can all contribute to the occurrence and prevalence of the disease. 3, control methods (1) agricultural control. Adhere to the disease-free zone and disinfect the seeds. Disinfection method, soaking in warm water at 55°C for 15 minutes, removing and soaking in cold water for 4 hours to sow germination. Can also be used 50% carbendazim seed dressing, the amount of 0.2% of the seed weight. Persisting non-melon crops for more than 2 years of rotation. The use of sterile soil for seedlings can also be used to sterilize bed soil with 8-10 grams of 50% carbendazim per square metre. The production sheds are smoked with sulphur powder before planting, and 500 grams of sulphur powder plus 2-3 kilograms of sawdust are used per acre. Control the temperature and humidity of the greenhouse (such as: control water and humidity), so that it is not conducive to disease. (2) Chemical control. Once the disease should be treated with medication immediately. It is possible to use 5% chlorothalonil dust per kilogram of dust per acre or 45% chlorothalonil smoke agent per acre 500 g smoke. The dusting should be carried out before the morning air is blown out. The smoke should be carried out after closing the booth in the evening. 70% thiophanate-methyl 600-fold, 75% chlorothalonil 500-fold, or Busterane 500 can also be used for spray control. Spray once every 5-7 days, even spray 2-3 times. Manual embroidery refers to the art of adding man's design and manufacture to any fabric present by hand, using needles and threads, and is one of the most precious species in the protection of intangible cultural heritage in China.
There are not many Handmade Embroidery types left in China at present, and the relevant departments in our country have called for strengthening the protection of this national culture. Hand-embroidered the most famous place of origin and reeling, the same production in Suzhou.
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