How to prevent and cure strawberry black heart
Symptoms of strawberry blackheart disease: the first inflorescence grows abnormally, the inflorescence, heart leaf, fruit stalk and petiole are extremely short, and cannot be extracted. The flower opens abnormally at the base, and the new leaf margin dries and blackens. The first serious inflorescence and new leaves all dry and black, farmers call it "black heart disease." Control measures: 1. Reduce the amount of chemical fertilizer applied, increase the application of biological organic fertilizer, improve the ability of soil to supply fertilizer, and improve the degree of soil salinization. Reduce the use of inorganic fertilizers, increase biological organic fertilizers with phosphorus, potassium and nitrogen fixation, and release fixed phosphorus, potassium and trace elements. At the same time improve soil physical properties. 2, leaves are not yellow do not pick, resolutely do not remove green leaves without reason, so that plants have more leaf area, increase the number of photosynthetic products, improve the nutritional supply of reproductive growth stage.
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Harm and comprehensive control of strawberry Verticillium wilt
Strawberry Verticillium wilt is a soil-borne disease. It is an important reason that affects and perplexes the expansion of strawberry production in recent years. Because strawberry is a perennial plant, after planting in the same field for many years, a large number of bacteria accumulate in the soil, coupled with the decline of variety disease resistance, poor field management and other factors, resulting in strawberry.
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Common diseases and insect pests of strawberry and their control
Strawberry is cultivated with plastic film mulching in greenhouse, which is hot and humid in the greenhouse, which creates favorable conditions for the occurrence of diseases and insect pests. The common diseases and insect pests of grass mold and their control measures are introduced as follows: first, common diseases 1, leaf spot disease. Mainly harmful leaves, typical symptoms with disease spot as the center is gray or grayish brown round spot, surrounded by purple.
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