How to control towel gourd downy mildew

Towel gourd, the Pearl River Delta towel gourd, especially star anise gourd, is a kind of cucurbitaceae plant native to India, also known as vegetable gourd, which is widely cultivated in East Asia. For Cucurbitaceae climbing herbs, towel gourd has strong roots. Stem trailing, five-angled, green, main and lateral vines are luxuriant, stem nodes with branched tendrils, easy to produce adventitious roots. It is distributed and cultivated both inside and outside China. The fruit is a summer vegetable, which contains all kinds of nutrients in melon food, such as saponins, towel gourd bitterness, mucus, lignin, citrulline, xylan and interferon. When mature, the reticular fibers inside are called loofah collaterals, which can be used instead of sponges to wash stoves and furniture. Can not be eaten raw, but also for medicinal purposes, there are cool, diuretic, blood circulation, dysmenorrhea, detoxification effect, as well as anti-allergic, cosmetic effect.

Varieties of towel gourd

First, Zaoyou No. 1: the first female flower node is 7-8 nodes, and then one female flower is born in each node, with straight melon strips, emerald green epidermis, thick wax powder, commercial melon length of about 26 cm, horizontal diameter of about 7 cm, single melon weight of about 500g, general yield of about 5000 kg per mu. This variety has strong resistance to melon downy mildew, blight and powdery mildew, low temperature and heat resistance.

Second, Xinzaoguan 406: very precocious, good resistance to low temperature and low light, good quality, high early yield, 5-6 nodes bearing the first female flower, and then 1 melon per section, melon length 40-45 cm, transverse diameter 5-6 cm, dark green color, thick white wax powder layer, fresh taste and slightly sweet taste. It is suitable for cultivation in protected field or open field in early spring.

Third, Xingshu Meijia: extra precocious, the first female flower node 6-8, belongs to the towel gourd type, continuous gourd ability is particularly strong, melon length of about 28 cm, melon diameter of about 6 cm, single melon weight of about 300 grams, commodity is very good.

Fourth, Xingzhu Zaojia: especially precocious, the first female flower node is about 8 nodes, the ability to sit melon is very strong, melon green with slight wrinkle, melon length 32 cm, melon diameter about 6 cm, single melon weight about 420 grams, pedicel preservation time is long, the commodity is very good.

Towel gourd downy mildew is one of the main diseases of towel gourd. Recently, the production of towel gourd in many vegetable areas was seriously damaged by downy mildew, resulting in disease spots, withered leaves, premature senescence, bent, thin and aging, and the yield and quality decreased significantly. So how to prevent and cure towel gourd downy mildew?

Symptoms of towel gourd downy mildew:

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.

Prevention and control of towel gourd downy mildew:

For the prevention and control of towel gourd downy mildew, we should select excellent varieties with disease resistance, 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 to the case. 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.