Cabbage root swelling

This is a disease that develops strongly in Da Lat vegetable area (Lam Dong) that people call " tuberculosis ". The disease is caused by Plasmodiophora brassicae. Fungal pathogens spread through the soil, through vegetables, irrigation water, tools for making soil, shoes brought from one field to another ., there is no specific medicine.

Preventive measures

• The disease-growing fields must collect all the leaves and rooting roots in the fields and bring them to incineration.
• Use Cyanamid calcic fertilizer from 80- 100kg / 1,000 m2, pre-fertilize and flip tree, dry soil 2 weeks before replanting new plants.
• Apply bio-organic fertilizer and micro-organic fertilizer.
• Use disease-free varieties, clean water from deep wells that are not contaminated.
• After planting, spray fungicides with biological products (Chitin, Trichoderma) to prevent poisonous mushrooms from attacking.
• Crop rotation should be applied to other vegetables with the cross.

The experience of many farmers in Dalat is to use calcic Cyanamid (slow-discharge fertilizer) with a maximum of 100kg / 1,000 m2 to prevent about 80% of the swelling of cabbage roots, making the disease not develop. In lime manure, it has the effect of reducing alum and improving soil structure. This fertilizer also has a positive effect on the nitrogen metabolism available in plants.

Using

With annual plants, fertilize before sowing seeds or transplanting seedlings. With perennial plants fertilizing after cleaning the garden. If you apply less (300kg), wait 6-8 days, more will wait longer, about 700kg to 1 ton, wait 15 days.

When fertilizing, it needs water and moist soil to make it highly effective. In case of lack of moisture and acidic soil, manure can be combined into Dicyanamide (CN2H2) 2 to create a mild toxin in the soil and nitrogen fertilizer.