Strawberry root rot prevention is not difficult

Strawberry root rot is mainly harmful to the root system. It begins with lateral roots or newborn roots at the beginning of the disease. Light red or brown irregular patches appear in the early roots, and the color gradually darkens to dark brown. With the development of the disease, all the roots were rapidly necrotic and browned; the outer leaves of the aboveground part of the leaves first yellowed, some of the leaves became brown, necrotic to curl, and the diseased plants showed water-deficient, gradually developing to the heart leaves to death of whole plants.

The occurrence of strawberry root rot has a close relationship with the soil environment. Generally, the root rot of the plot within 5 years of strawberry planting is mild or non-occurring; the root rot of the old shed planted in 5 years, especially more than 10 years, especially Seriously, the output will also drop. The roots of strawberry root rot plants were significantly shorter than the roots of normal plants, the color was gray, and the adventitious roots in the lower part died in large numbers. After the new roots were invaded by pathogenic bacteria, the growth was sparse. The roots are damaged, and the ability to absorb water and fertilizer is reduced, which directly causes the water, inorganic substances and nutrients to be unable to be transported normally, resulting in weaker parts of the ground or yellowing of the whole plant.

Prevention and treatment method

Reasonable rotation, clearing the pastoral and timely clearing the diseased and diseased bodies in the field, burning or destroying the soil during the idle period of the greenhouse. 120 kg of lime nitrogen per acre is used. More than 25 days, can effectively kill soil bacteria and eggs.

High mulch film cultivation, scientific watering and fertilization root rot is directly related to excessive humidity in the shed or excessive watering. In order to reduce the humidity in the shed, it is advisable to adopt high-mulch mulching cultivation to achieve watering under the membrane and pouring water in small water. It is best to adopt drip irrigation. When using base fertilizer for strawberry, it should be applied with fully decomposed organic fertilizer, increase the amount of bio-organic fertilizer, and deepen the soil to improve soil permeability and cushioning power.

The pesticide control of strawberry root rot should be based on prevention. Spraying 75% chlorothalonil WP 500 times to 800 times liquid and Pridden fish protein 300 times solution in the slow seedling stage and before flowering, respectively. After planting, the roots of Prideon fish protein 500 times + 800 times of carbendazim were used to irrigate the root rot. For the strawberry in the greenhouse where root rot has occurred, the diseased plant should be pulled out in time, and the root of the diseased plant should be irrigated with 5.00 times of nail cream and carbendazim + 500 times of Pridden fish protein.

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