Grafted watermelons are easy to suffer from fruit spot disease in rainy days. These methods can help you do a good job in prevention and control.

As far as watermelon fruit spot is concerned, it has a high incidence in the seedling stage, and it begins to show symptoms at the seedling stage, but it is also difficult to control because of the influence of wound and field humidity. After the disease, obvious symptoms can be shown in the leaves, petioles and even stems of watermelon.

In fact, it is a relatively contradictory problem that how to reduce the incidence of fruit spot in a rainy climate. High humidity in overcast and rainy weather will also be more conducive to the occurrence of fruit spot, which is a favorable condition for the breeding of fruit spot. Therefore, in this case, even if the drug is used to eliminate fruit spot, it is no small problem.

Fruit spot is a typical seed-borne disease, eosinophilic environment, can be attached to the surface of the seed, but also can invade the inside of the seed, and quickly invade the plant after seed germination. Even in farmland, it can live in the soil for many years. After the watermelon plant is damaged, the pathogen of fruit spot will invade.

For grafted watermelons, in fact, wounds are inevitable in seedling grafting, and in this case, it is also very easy to cause fruit spot infection, while areas such as greenhouse watermelons and many Rain Water areas with high air humidity can also cause fruit spot disease on a large scale.

In view of the above situation, try to avoid the infection of fruit spot disease, prevention is supplemented by prevention. Here are a few tips.

First, the operation of grafted watermelon equipment should pay attention, such as the blade as far as possible to achieve disinfection, in addition, pay attention to wear gloves when operating, and change frequently. And the rootstocks of germs should also be removed, so don't do grafting.

Second, if it is a greenhouse watermelon, some quicklime can be placed in the shed to reduce air humidity.

Third, seeds should be resistant to diseases and insect pests as far as possible. for local epidemic diseases, resistant seeds must be selected and coated or soaked before sowing. Rinse the seeds with 2% hydrochloric acid or soak the seeds with 2% Chunlemycin 200 times dilution for half an hour.

Fourth, clean up the weeds in the field in time to reduce the source of disease transmission.

Fifth, the method of spraying after dilution at a low speed can be used to curb the spread of the disease in production. Fruit spot pathogen is acidophilic bacteria, sodium bicarbonate is weak alkali, break the environment of breeding disease, and achieve the purpose of treatment or prevention. And baking soda is not a drug, so you don't have to worry about agricultural residues.

The above briefly share a few suggestions, I hope to be helpful to you.