Prevention and treatment of black heart and black skin of radish

Radish black heart, black skin is a week phenomenon in planting, seriously affecting the yield and quality of radish, but also brought great losses to farmers, so what is the cause of radish black heart, black skin? How to prevent it? Let's learn more about it together with Xiaobian.

1. Apply sufficient boron fertilizer

The main reason for radish black heart and black skin is caused by boron deficiency, and to prevent boron deficiency and lead to radish black heart and black skin, we must first apply sufficient base fertilizer. Organic fertilizer not only has complete nutrients and high boron content, but also can improve soil structure and physical and chemical properties, improve soil water and soil fertility, expand root expansion range, alleviate drought damage, and promote vegetable crops to absorb boron and other nutrients. Organic fertilizer can be used as base fertilizer or topdressing, and the base fertilizer dosage is generally 4000-6000 kg per mu. The topdressing is 1000-2000 kg, and 300-400 g borax can be applied per mu in the land with serious boron deficiency. the topdressing can be mixed with other fertilizers and then applied, or foliar fertilizer spraying can be adopted by spraying 0.2% boric acid or 0.3% borax aqueous solution

2, break the soil hardening

When soil hardening, it is an important reason for radish black skin. The soil is hard, hardened, poorly ventilated, and the application of undecomposed organic fertilizer will cause intense microbial activity in the soil, excessive oxygen consumption, and oxygen deficiency in roots and some tissues. The best measure to break the soil hardening is to deeply plow and rake, first deep 18-20 cm, then rake it into pieces, and when there is accumulated water, it should be removed in time to avoid soil anoxia hardening.

3. Prevention of black rot

When black rot occurs, the veins turn black and reticulate, and finally the leaves turn yellow. When the fleshy roots of radish are infected, the vascular bundles turn black and brown in radial shape, and the heavy ones show dry shrinkage cavities. To control black rot, we should select resistant varieties first, and take sun-seeding, greenhouse soaking and chemical disinfection measures before sowing. Before sowing in summer, the soil can be deeply ploughed and sun-dried to eliminate pathogenic bacteria in the soil, and some quintozene can be sprinkled, and then a layer of fine soil can be covered. Can rotate with non-cruciferous vegetables for 2-3 years, can effectively prevent and control the disease, strengthen field management, timely watering at seedling stage, reasonable squatting, timely pulling out diseased plants, removing diseased leaves, reducing the chance of repeated infection of germs. In the early stage of the disease can be used agricultural streptomycin sulfate, thiazole copper, quinoxone and other chemicals spraying control.

The above is the radish black skin control method introduction, hope to help you, want to know more related knowledge, please pay attention to us.