What diseases and insect pests should be controlled when planting towel gourd?

What diseases and insect pests should be controlled when planting towel gourd? Please guide the cultivation of towel gourd there are the following diseases and insect pests to control: the main insect pests of towel gourd are: Huangshou gourd. There are firefly-like insects in towel gourd fields, which is a symptom of Huang Shou gourd damage. The adult of Huangshou melon bites the leaves, stems, flowers and fruits of the plant, and bites off the tender stems of the seedlings, mainly the leaves, which will lead to the death of the whole plant. The larvae endanger the roots in the soil, and after the third instar, they feed on the phloem and xylem, wilting and withering the shoot. Huang Shou melon likes to be warm and wet, with the most active activities at noon and a wide range of adult feeding habits, harming gourd, bottle gourd, wax gourd, zucchini and other melons and vegetables. Prevention and control measures: (1) intercropping. Planting melon seedlings between rows of cabbage, celery, lettuce and other crops can reduce the damage degree of Huangshou melon. (2) Pesticide control. You can use 1500-2000 times of 20% cypermethrin EC or 1000-1500 times of 10% cypermethrin or 5000 times of 10% cypermethrin or 1000-2000 times of enemy-fed EC or 1500-2000 times of 90% crystal trichlorfon, etc. at noon, spray soil surface and field edge weeds and other pest habitat to control. In addition, manual capture can also be carried out. Main diseases and symptoms of towel gourd downy mildew symptoms: towel gourd downy mildew mainly harms leaves. At the beginning of the disease, irregular brown-green-yellow spots appeared on the front of the leaves, gradually expanded into polygonal yellow-brown spots, gray-black mildew layer grew on the back of the disease spots with high humidity, and the whole leaves withered in the later stage. Recently, the production of towel gourd in many vegetable areas has been seriously damaged by downy mildew, resulting in numerous disease spots, dry melon leaves, premature senescence, curved, thin and aging melon strips, and a significant decline in yield and quality. Prevention and control methods: to prevent and control towel gourd downy mildew, we should select good disease-resistant varieties, raise strong seedlings in a nutrition bowl, make good drainage, apply sufficient basic fertilizer, pay attention to vine pruning, ensure ventilation and ventilation between plants, and it is more important to spray timely and prescribe the right medicine. Before and at the initial stage of the disease, choose protective agents, such as 75% Dashuangning 600,800X, Chlorothalonil or Baikening (40% suspension) 500,700x; spray therapeutic (and protective) agents during the onset of the disease. such as Shengzhuangjing (64% wettable powder) 600,800 times, frost (55% wettable powder) or Shuanglu Sujing * 72% wettable powder) 800,800 times. Spray once every 7-10 days, spray 3-5 times according to the condition, pay attention to the leaf surface and back are evenly wet. The concentric pattern of anthrax is the main feature in the later stage of the disease. At the beginning of the disease, it was a light yellow near-round spot, then expanded into black-brown, and had wheel markings. When the disease spot was dry, the central part of the spot was easily perforated and ruptured. In severe cases, the leaves withered early and the yield was seriously reduced. Melon vines and petioles are susceptible, and the spot is oval dark brown. When the humidity is high, the spot overflows pink mucus. High temperature, high humidity and heavy rain were beneficial to the occurrence of anthracnose, and the pathogen overwintered on the remnant with mycelium and conidia. The blight mainly damages the fruit, and sometimes the stems and leaves are also damaged. Most of the fruit disease starts from the flower pedicel, the disease spot is sunken, and it is water-stained dark green at the beginning. When the humidity is high, the melon will soon rot and have white mildew. The disease of stem vine is mainly in tender stem or Internode, which is watery at the beginning, wet rot and dark brown in the whole segment after expansion. Leaf disease, at the beginning of the water-stained yellow-brown spot, when the humidity is high, the white mold layer is born, when it is dry, it is bluish white and easy to break. Powdery mildew mainly damages leaves, petioles and stems. The leaves are primary round or irregular powdery spots on the front and back, and then they turn yellow and dry. At the initial stage of the disease, it is not easy to detect, but it is difficult to prevent and cure after it is serious, which affects the yield and should give priority to prevention. Click for more towel gourd planting techniques click to get more vegetable planting techniques