1. The choice of planting bases is not scientific. The choice of bases should be viewed in three ways: one look at the terrain. As southern watermelon is rotated with rice, there are many irrigated plots and the soil moisture content is high, so the base is first selected in a place with good drainage and high terrain.

Second, look at the soil. The soil in the south is sour, which has caused serious incidence of fusarium wilt and vine blight. Therefore, when choosing a base, do a soil test and choose a plot with neutral soil and high organic matter content.

Third, look at the surrounding environment. The regional small environment determines the growth of crops and the degree of disease occurrence.

2. The level of seedling raising is relatively low, and the seedling raising facilities are backward. First of all, the seedling rate of seedlings is low. Like the "Mitong" variety, the seedling rate in some places is only more than 20%, and the most popular is only more than 80%. The emergence rate is about 50%. Secondly, there are more diseases in the seedling stage. The damping-off and wilt disease in the seedling stage are serious, and the death rate of seedlings in some greenhouses is about 40%. Seedbeds are also mostly selected in greenhouses close to the base. Three-film mulching is used to raise seedlings. The temperature and humidity cannot be controlled. The seedling soil is also used directly in the rice field. The soil is acidic, has many pathogens, has low organic matter content, poor permeability, and is not conducive to roots. Grow.

3. Irregular field operations and unscientific cultivation methods. Because growers employ a large number of idle labors around them and have not undergone standardized training, the management of greenhouse fields is relatively poor. The most important thing is that the operation is not standardized when pruning branches and branches. Many of them are directly torn by hands. The wound is too large and long, resulting in serious disease such as vine blight infected through the wound. Many watermelon plants rot or even die.

4. Incomplete field facilities should choose a few representative greenhouses, hang a temperature and hygrometer, check regularly, and ventilate and cool down in time. Set up yellow sticky insect boards to monitor the activities of insects. Once pests are found, they should be sprayed immediately to control the insects in advance to prevent their reproduction and spread, reduce losses and save investment.

5. Growers lack agricultural knowledge. Grassroots pesticide operators lack plant protection and pesticide knowledge, or in order to pursue high profits, they blindly recommend repeated and redundant pesticides to farmers. It is recommended that the local plant protection department or competent distributors provide professional training to large growers, learn how to use medicines rationally, and reduce unnecessary losses.

6. Improper mixing of medicines. There is a certain order in the mixing of pesticides indiscriminately. Mixing indiscriminately will reduce the efficacy of the medicine. The correct mixing sequence is foliar fertilizer, wettable powder, suspension, liquid, emulsifiable concentrate. Add one by one, and stir and mix well after each addition. It is prepared for immediate use to avoid excessively long storage time after mixing to reduce efficacy.

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Greenhouse Seedling Bed

A seedbed or seedling bed is the local soil environment in which seeds are planted. Often it comprises not only the soil but also a specially prepared cold frame, hotbed or raised bed used to grow the seedlings in a controlled environment into larger young plants before transplanting them into a garden or field. A seedling bed is used to increase the number of seeds that germinate.

Greenhouse Seedling Bed,Stainless Greenhouse Seedling Bed,Greenhouse Seedling Nursery Bed

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