What causes deformed roots in radishes? How to prevent and control them

Radish is a common vegetable in our daily lives, rich in nutrients and deeply loved by people, but during the growth of radishes, abnormal growth of the fleshy root can occur, seriously affecting the yield of radishes. So what causes deformed roots in radishes? How should they be prevented and controlled? Let's take a look together.

1. Overly dense planting

If planting is too dense, the root systems of radishes will squeeze against each other, causing the main root to bend, the lateral roots to grow vigorously, and finally resulting in deformed radish root systems.

Prevention and control methods: Plant at a reasonable density using the hill sowing method, with a plant-to-row spacing of 20×25 cm per hill. When sowing, generally sow 5-7 seeds per hill, and they should be spread out. When the seedlings grow to 2-3 true leaves, thin them promptly, leaving 2 plants per hill. When they grow to 5 true leaves, finalize the seedlings, leaving one strong seedling per hill.

2. Heavy clay soil

If the cultivation soil contains impurities such as brick pieces, perennial roots, waste plastic film, etc., or if the soil itself is relatively heavy and clayey, the growth of radishes will be hindered, thereby producing deformed roots.

Prevention and control methods: Choose sandy loam or loam soil with deep soil layers and rich organic matter for planting. Before planting, prepare the soil so that it is loose, level, and free of obstacles such as crushed stones and perennial roots.

3. Improper fertilization

If undecomposed organic fertilizer or farmyard manure is applied during planting, the fertilizer will release a large amount of heat during fermentation and decomposition, thereby burning the growth nodes of the main root and causing the root system to fork. In addition, if radishes lack the element boron, the root system will also grow twisted and deformed.

Prevention and control methods: When applying base fertilizer, be sure to ensure that organic fertilizer and farmyard manure are fully decomposed before application. Also pay attention during later topdressing, and it is not advisable to let fertilizer come into direct contact with the root system to avoid burning. For boron deficiency, an appropriate amount of borax can be added to the base fertilizer; generally 1 kg per mu is enough to meet the boron demand of radishes throughout the entire growth period.

4. Underground pests

Many underground pests can also cause deformed roots, such as white grubs, mole crickets, wireworms, cutworms, and others. If not properly controlled, they will continuously gnaw on the main root of radishes, causing the lateral roots to swell and producing deformed roots.

Prevention and control methods: Underground pest control must be thorough. When preparing the soil, deep plow the soil, remove weeds and residual plant stems, and eliminate sources of insects. If conditions permit, broadcast poisoned soil to kill them. During pest outbreaks, chemicals such as trichlorfon and dichlorvos can be used for root drenching control, but attention must be paid to the concentration.

The above is an introduction to the causes of deformed roots in radishes and the prevention and control methods. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.