The occurrence of cucumber scab in the greenhouse is widespread, and it is also a subject of domestic plant quarantine. The damage is serious. In recent years, there has been a trend of development, in addition to harming cucumbers, but also impregnated with pumpkin, pumpkin, watermelon, melon, etc., should pay attention to strengthen prevention and treatment. First, the symptoms and characteristics of seedlings infected, yellow and white round spots on the cotyledons, dry leaves after the development of the whole stem; stem disease infected with water-drenched dark green spindle-shaped spots, depression, cracks, when the humidity grows black mold layer; tendril disease The brown rots; the growing point is infected for 2 to 3 days and rots into a bald pile of inadvertent seedlings; the diseased leaves begin to produce chlorotic spots, nearly round, gradually expanding and quickly drying, forming round or near-circular yellow-white Lesions, lesions left behind after the perforation of the star-shaped edge, Zhou Zhou hole shrinkage; melons on the dark green spots of depression, the surface grow black mold layer, causing lesions were scabs, stop growing, forming a deformed melon. Second, the occurrence of conditions, the optimal temperature of 20 °C ~ 22 °C, relative humidity of 90%. Therefore, even the cloudy days, lack of light, plant closure, excessive humidity, long-term weight loss and sowing of diseased seeds are important conditions for causing the disease. Third, control methods 1. Rotation. Rotate with non-cucurbit vegetables for 2 to 3 years. 2. Use disease-free seeds and seed treatment. In addition to selecting disease-resistant varieties, disease-free seeds should be used. Diseased seeds need to be disinfected, soaked in warm water at 50°C for 30 minutes. Can also be seed weight 0.4% of 50% carbendazim or captan WP wet dressing. 3. The greenhouse smoked with sulfur powder. Before planting or raising seedlings in the greenhouse, use 2.4 grams of sulfur per cubic meter of space, add 4.5 grams of sawdust and mix well, and then place the smoke in a closed, fumigating smoke overnight. 7 to 10 days after nursery or planting, can effectively kill the bacteria. 4. Strengthen greenhouse management to prevent diseases from occurring. During the production period, it is forbidden to flood irrigation, and the method of humidity increase and humidity reduction and high temperature ventilation should be adopted. The specific approach is: every morning after the dumplings, the humidity in the greenhouse can reach 90% to 100%. One of the reasons is that the growth period of greenhouse cucumber must be at 28°C-33°C every morning, which is the most suitable high-yield temperature. The early air temperature is low, which is not conducive to high yield of cucumber; the second reason is that the indoor humidity can reduce the humidity by 1°C. 2% to 3%. Therefore, in the morning, when the cold air is released, it is not as good as a warming and humidifying effect. Therefore, the correct way is to start exposing each morning, you can not immediately release the wind, it should be closed all vents, let it warm to 33 °C ~ 35 °C, and then suddenly open the top vent to vent moisture. However, when the temperature drops to 30°C, the air outlet must be closed again, and when the temperature exceeds 33°C, the air is released again. Every morning, 2 or 3 times of high-temperature ventilation is performed, and in the afternoon, the temperature is reduced to 25°C to 28°C. This will greatly reduce the humidity, especially the nighttime humidity, effectively control the occurrence of scab and various diseases. 5. Drug control. When diseased plants are found in the shed (timely removal of diseased seedlings), 45% chlorothalonil aerosol should be smoked once a night, 40% DuPont Fuxing 8000 times spray, or 50% acetaminophen wettable powder. 1000 times liquid foliar spray, once every 7 days, pay attention to alternate use of drugs can receive better results.
Anthocyanins are a type of flavonoid, a class of compounds with antioxidant effects. Found naturally in a number of foods, anthocyanins are the pigments that give red, purple, and blue plants their rich coloring. In addition to acting as antioxidants and fighting free radicals, anthocyanins may offer anti-inflammatory, anti-viral, and anti-cancer benefits.
Recent research suggests that anthocyanins may also help fend off major health problems, including heart disease and cancer.
1) Heart Disease
Anthocyanins may enhance heart health, anthocyanins appear to improve cholesterol levels and blood sugar metabolism, as well as fight oxidative stress.
2) Obesity
Preliminary research suggests that anthocyanins may protect against obesity.
3) Cancer
Anthocyanins may aid in the prevention of breast cancer, according to a laboratory study published in Phytotherapy Research in 2010.
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