How to treat Watermelon Seedling Diseases

Watermelon is a kind of fruit that we often eat in summer. it has many varieties and different prices, but it is so popular that there is even a new word called "onlooker" on the Internet. Watermelon can clear away heat and taste sweet and juicy, but the growth of a watermelon needs to be sown in March, insect pests in April, and care in May before it can grow bright red and mature in June. in addition, it also needs the help of the climate to eat it all the way to our mouths. So how to treat the disease in the watermelon seedling stage?

I. Disease treatment of watermelon at seedling stage

The main diseases of watermelon in seedling stage are quenching disease, blight disease, virus disease, rust root disease and so on. the specific symptoms should be determined and treated according to the specific symptoms.

The main symptoms of watermelon quenching disease in seedling stage were waterlogged disease spot at the base of seedling stem, and then the disease turned yellowish brown and constricted into a linear shape. The disease developed rapidly, and the seedlings collapsed before the cotyledons withered. The main treatment was to spray 64% disinfectant alum wettable powder 500 times or spraying 25% Ruidui wettable powder 800 times after emergence.

Symptoms of watermelon blight disease the stem base of diseased seedlings produced oval dark brown disease spots, the early diseased seedlings wilted during the day, recovered sooner or later, the disease part gradually sunken, expanded around the stem for a week, and constricted and withered, and finally the plant withered. The main treatment method was to irrigate the seriously diseased plants and the plants within 3 meters around the diseased plants with 300x liquid of "Qingkulike" and 15-20ml of "garlic oil". The roots were irrigated twice continuously, with an interval of 1 day, and then consolidated once at an interval of 5 days after the second treatment according to the disease.

Virus disease is also called mosaic disease. after watermelon is damaged, the leaves become smaller, grow slowly and the plant is dwarfed, floral organs are dysplastic, seriously unable to set fruit, or stunted after fruit setting, the yield is low and the quality is poor, losing commercial value. The treatment is to spray 1000 times of imidacloprid wettable powder or 1500 times of imidacloprid EC, once every 7 days, for 2 times continuously.

Watermelon rust root disease is also called root rot disease. At the beginning of the disease, the cotyledons are sagging and the seedlings grow very slowly. The root is yellow and rusty at first, but it takes a long time to produce new roots. In severe cases, it leads to rotten roots and the death of seedlings. The main treatment methods are spraying or pouring 50% methyl thiophanate (methyl thiophanate methyl) wettable powder 500x or 50% carbendazim wettable powder 500x, 60% Fangmaibao ultrafine wettable powder 800x, 50% carbendazim wettable powder 1500 times, stop using medicine 3 days before fruit harvest.

Second, the main points of planting watermelon

Although watermelon tastes sweet, it requires more climatic conditions such as soil moisture when planting watermelons. When planting watermelons, we must first examine whether the local climate is in line with the planting conditions of watermelons. The main points are as follows:

1. Choose sandy loam with loose and fertile soil and convenient drainage and irrigation, it is best not to rotate with other melons and fruits.

two。 Base fertilizer is mainly high-quality organic fertilizer and cake fertilizer, supplemented by inorganic fertilizer, can not apply chlorine-containing fertilizer, the amount of fertilizer depends on soil fertility and cultivated varieties, but also according to the growth of watermelon topdressing.

3. At the seedling stage, water should be watered as little as possible, or even not watered, and water should be controlled before flowering and fruit setting to prevent crazy growth; after fruit setting, sufficient water supply should be ensured to facilitate fruit expansion and increase weight.

4. Those transported or stored over long distances can be harvested at medium well, while those sold in the suburbs on the same day can be harvested at well-done. Harvesting usually takes place in the morning.

The above is some related knowledge about the diseases and planting points of watermelons. When planting watermelons, we must often patrol the fields, and when we find the abnormal phenomena of watermelons, we must identify the causes in time for symptomatic treatment.