At present, it has entered the rainy season. Over the summer, watermelons are prone to epidemics and anthrax in production. So remind melon farmers to focus on preventing these two diseases.
Watermelon epidemic disease, also known as “Phytophthora infestansâ€, is commonly referred to as “death bug†and is a kind of soil fax fungus disease. It can occur both in the seedling stage and the adult stage of watermelon. Especially in the late growth period and high temperature and rainy conditions of watermelon, the onset is rapid and serious. In general, the rainy season comes early, the rainfall is long, and the rainfall is large, so the onset is early, the disease is heavy, and the loss is large. The peak incidence in the field is often followed by the peak rainfall. Its onset temperature is 5 °C ~ 37 °C. Symptoms: the onset of the leaves, resulting in dark green water spots round or irregular shaped spots, rotten when the humidity is high or as wilting as boiling water burned, when the lesions are light brown, easy to break. In the basal part of the vine, the disease department first developed a spindle-shaped water-immersed dark-green depression spot, which was severely rotted, and all of the diseased parts died. Onset of the disease, the diseased part first formed a dark green round water-immersed depression spot, and the latter lesion quickly expanded to the whole fruit, causing the fruit to rot, giving off the odor of silage, and the dense mycelium on the surface of the diseased part. Control methods: From the early stage of disease occurrence, use 50% methicone wettable powder 700 to 800 times, or 72.2% Preclosure 800 times, or 64% antivirus WP 500 times, every other time. 7 to 10 days spray 1, even spray 3 to 4 times. When necessary, the above liquid can also be used to irrigate the roots, and 0.4-0.5 liters per plant. If spray and irrigation are performed at the same time, the effect is better.
Most of watermelon anthracnose is transmitted by seeds. If the disease is later infected and a large number of conidia are produced in the diseased part, it can be transmitted through rainwater and irrigation for secondary infection. At present, it is the high incidence of watermelon anthracnose that blooms in summer. The actual production shows that low-lying terrain, poor drainage, excessive nitrogen fertilizer application, poor ventilation, and severe onset of land mass are even more serious. Symptoms: Watermelon leaves are flooded with spots at the beginning of the disease. There are often yellow-brown halos around the periphery of the leaves. After the depression in the middle of the lesion, it turns dark brown, sometimes with concentric ring patterns. It is easy to break when dry. Mature fruit infections are immersed in water-soaked brown spots, and sometimes there are cracks in the depressions. When the humidity is high, it is easily rotted. Control methods: Use 25% Prochloraz EC 1000x or 50% SPW 1500x to spray.
Adult Diapers Cvs,Adult Underwear,Adult Diapers Amazon,Adult Diapers For Women
Shandong Kangshun Daily Products Co., Ltd , https://www.centurybenifit.com