In the late growth period and harvest period of apple, the symptoms of mildew and rot appear in the heart of the fruit. They are collectively referred to as "mushroom heart disease". Control methods: 1. Reasonable fertilization. Farmers' manure was increased, and nitrogen, phosphorus, and potassium fertilizers were reasonably applied to enhance the disease resistance of fruit trees. 2. Chemical control. From the bud stage to the 10 days after flowering, continuous spraying of fungicide three times can achieve better control effect. During the prevention and treatment, attention should be paid to the following: First, Apple's fungal heart disease is caused by a mixture of various pathogens, and must be targeted against multiple pathogens in the prevention and control. Second, the use of pesticides requires the use of a broad spectrum of agents. If a single agent cannot cover multiple pathogens, then Mixed use of several agents; Third, the pathogen infection period lasted for a long time. Flower buds began to infect from the previous year. For the open varieties of the eel, there is a potential threat of invasion during the whole growth period of fruit development, so we must consider increasing The number of pesticides to be applied and the best period for the selection of prevention or control, or the use of biological agents with sustainable effects for prevention and treatment. Active Pharmaceutical Ingredients Refers to the raw materials used in the production of various preparations, and is the active ingredient in the preparations
And the drug in powder, crystal, and extract state is processed into administration forms (such as tablets, capsules, injections, pills, ointments, etc.) that are convenient for patients to take, and these administration forms are called drug dosage forms .
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Various substances prepared by chemical synthesis, plant extraction or biotechnology are used as medicinal powders, crystals, extracts, etc., but cannot be directly taken by patients.
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