In Zhanghe Village, Dongjia Town, Licheng District, Jinan City, Shandong Province, the cultivation of strawberries lasted for more than 10 years. There were more than 1,500 winter-wheat-cultivated strawberry growing sheds. The strawberry planting area centered around Zhanghe Village has reached close to Millions of acres, in recent years, with the continuous expansion of planting area, coupled with many years of continuous cropping, strawberry root rot is getting more and more serious, got the root rot of strawberries, dry leaves rot, and later connected death, a great loss. Farmers are eager to find ways to prevent them.
Strawberry root rot mainly damages the root system. At the beginning of the disease, it starts from the lateral roots or the newly born roots. The initial roots appear light red or brown irregular patches, and the color gradually darkens. With the development of the disease, all roots quickly became necrotic and brown; the leaves of the upper part of the aboveground part of the outer leaf were browned, necrotic, and cristae, and the diseased plants showed a lack of water, and gradually developed toward the heart until the whole plant died of yellow.
After field investigation, the occurrence of strawberry root rot is closely related to the soil environment. Generally, the occurrence of root rot in the land within 5 years of planting strawberries is lighter or does not occur; planting in 5 years, especially planted in more than 10 years Root rot of strawberry in old sheds is particularly serious, and the yield also falls. The root rot of strawberry root rot was significantly shorter than that of normal plants, and the color was dark. The adventitious roots of the roots died a lot. The growth of the roots of new plants was sparse after being attacked by pathogenic bacteria. The damage to the roots and the ability to absorb water and fertilizers will directly lead to the failure of normal transport of moisture, inorganic substances and nutrients, resulting in weaker or darker yellows. In recent years, the disease has risen in the strawberry growing area, and strawberry root rot has occurred in Jiangsu, Hebei, Shandong, and Liaoning provinces.
So how do we control strawberry root rot?
1. Rational rotation, clean up the pastoral. Timely removal of field culprit strains and diseased bodies, concentrated burning or sterilizing the soil during the idle period of the greenhouse, using 120 kg of lime nitrogen per acre, continuous covering of the mulch after watering and covering for more than 25 days, can be Effectively kill soil pathogens and eggs.
2. High ridge plastic film cultivation, scientific watering and fertilization. Root rot is directly related to excessive humidity or excessive watering. In order to reduce the humidity in the greenhouse, it is advisable to adopt high ridge and film-cover cultivation to achieve watering under the membrane and pouring in a small amount of water. It is advisable to adopt the drip irrigation method for the conditions. When basal fertilizer is used for strawberries, sufficient organic fertilizer should be applied to increase the amount of bio-organic fertilizer and deep-swap the soil to improve soil permeability and buffer strength. The amount of nitrogen, phosphorus and potassium fertilization applied in winter should not be too much. It is recommended to use NPK plus fertilization 5 kg and 4 kg of Pdidden fish protein mixed per acre, which can simultaneously play the role of swelling and rooting.
3. Chemical control. Strawberry root rot should be mainly prevented. Spraying 75% chlorothalonil wettable powder 500-800 times solution and Pritden fish protein 300-times respectively before and after planting at the seedling stage and flowering can also be used after setting. Pridin fish protein 500 times + hymexazol 800 times to irrigate the root, the effect of early prevention of root rot. For the greenhouse strawberry that has now undergone root rot disease, the diseased plant should be pulled out in time, and the roots should be rooted with 1500 times solution of a cream and hymexazol and 500 times solution of Pidgin fish protein.
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