The cress tastes cool, avoids heat and drought, grows below 25 °C, the mother stem begins to sprout, grows fastest at 15-20 °C, stops growing below 5 °C, can withstand -10 °C low temperature; lives in the river ditch, paddy field It is suitable for clay soil with soft soil, deep and fertile soil, rich in organic matter, fertilizer and water retention. Although there are few pests and diseases in the process of planting, it is necessary to strengthen management to ensure quality and maintain production.
First, leaf blight
This is the main disease of cress, which mainly damages the leaves and causes the leaves to die, affecting the external quality and commodity value of the crops. What is the cause of the epidemic of leaf blight?
1. Cress has a cool climate with a suitable growth temperature of 15-25 °C. Cress is deep-water planting and is also a high-temperature continuous, high temperature and high humidity weather conditions lead to leaf blight epidemic.
2. Soil acidification, root rot, and poor plant resistance.
3. The lack of medium and trace elements.
4. Years of farming lead to the growth of pathogens.
Second, severe phosphorus deficiency
The farmer's 2 points from the transplanting to the picking with an imported 15-15-15 balanced fertilizer 5 times, why is it so serious that phosphorus deficiency, where is the reason?
1. Year-to-year continuous cropping causes the growth of pathogens, which endangers root rot.
2. In order to quickly extract the fertilizer and unscientific fertilization, the farmers increase the number of times and increase the application of chemical fertilizer to cause soil acidification.
3. Phosphate fertilizer enrichment and high temperature continue to cause harmful substances such as ammonia and hydrogen sulfide to harm the root system, and the rooting ability is weak.
3. Farming management to protect the healthy growth of cress
1. Soil improvement is the primary condition to increase the pH value of the soil, increase the effectiveness of phosphorus, and reduce the amount of chemical fertilizer: if 15 kg of fertilizer is used before 2-3, it can now be applied with 8-10 kg. 200ml flushing water, every time the water cress is Baokang 2-3 times in a row, each interval 7-10 days.
2, improve crop stress resistance and growth, in the seedling stage and growing season with the United States plus 15ml + love increased beauty 5ml / 30 kg water and Tu Baokang 20ml + Ai Mige 20ml / 30 kg water spray leaf spray.
3, in the growth of cress, pay attention to the medium and trace supplement, with Amyg 20ml + Fuleong micro-fertilizer 15g / 30 kg of water, with 2-3 times, interspersed.
4, leaf health and disease prevention and control: Jianda 8ml, Jiangong 15ml, Kairun 8-10ml, Yang Cai 10ml + Hua Ximei 8g / 30 kg water, in turn.
Cress has both medicinal value and edible value. Its yield is high and stable, pests and diseases are relatively few, planting techniques are simple, and management needs to be strengthened to produce high-quality water celery!
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