Apple rot disease, also known as root rot, is caused by the infestation of pathogens. It also has physiological rot caused by blisters, frost damage, salt and alkali, improper fertilization, and poor management.
Before planting seedlings, the first thing to consider is that the selected plots are not easily flooded, because low-lying floods often cause roots to have difficulty in breathing, and such plots suffer from freezing damage and heavy salinity, which can cause physiological rot. In addition, it is not appropriate to build a garden on the sticky soil or on the beach.
To prevent rot disease caused by pathogens, it is important to select detoxification seedlings or wild rootstock propagation seedlings, and it is not possible to use apple seedlings as seedlings for rootstock propagation. The second is to dig large pits and apply organic fertilizer. The organic fertilizer must be fully cooked, but also mix well with the pit soil to ensure that the seedlings grow robustly after planting, and enhance the ability of root disease-resistant bacteria. The third pair of plots with fruit trees or forest trees on the front side are due to more rot and root pathogens in the soil. Therefore, the pit soil should be sterilized on the basis of picking up rot roots, and chemicals suitable for cratering can be selected. 500 times liquid copper sulfate, 75% pentachloronitrobenzene 800 times, 50% dexamethasone 400 times, 40% methasenic arsenic 500 times, 70% thiophanate-methyl WP 1500 times, 2% agro Anti-120 water 200 times and so on.
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