Control of heart rot of celery in spring

In the spring, some farmers will find the celery in their vegetable fields. Although the outer leaves still look so dark green, the heart leaves of the celery begin to turn yellow and rot, and then the celery roots and some stems and leaves die one after another. This is what heart rot is doing. The heart rot of celery is mainly due to the lack of calcium and boron in the soil or continuous rainy days. After the rain, the sun shines directly, which makes it difficult for the celery root to absorb calcium and boron.

Celery

The following measures can be taken to control the heart rot of celery:

First, rational fertilization. Base fertilizer should be fully applied and properly increase the application of phosphorus and potassium fertilizer and boron fertilizer to cultivate strong celery to improve disease resistance. Do not provide too much nitrogen and potassium fertilizer to celery to avoid hindering the absorption of boron by celery.

Second, it is necessary to keep the border surface moist and not too dry. Rational irrigation, not flooding. At low temperature, keep celery warm and irrigate properly.

Third, timely removal of disabled bodies, reasonable close planting, increase ventilation and transmittance.

Fourth, an appropriate amount of boron fertilizer should be applied.

Fifth, chemical prevention and control. Diseased celery plants were immediately removed and controlled with chemicals to prevent spread.

1. In the early stage of the disease, 1000 times of metalaxyl + Jingbo calcium + 1000 times of boron fertilizer, or 2000 times of pyrazolyl ester + 750x of nonglixine or 1500 times of azolidoprim + 1000 times of green leaf fertilizer can be effectively prevented.

two。 After the onset of the disease, 25% metalaxyl 600 times solution + 70% thiophanate 600 times solution + Jingbo calcium or 25% pyrazolyl pivoxil + 64% carbendazim manganese zinc 1000 times solution + carbendazim 750x solution, or Fumishuang 500x solution + 70% alaxyl 3000 times solution + Li Zhi calcium 1000 times solution, sprayed once every 3 days, 2 to 3 times continuously can effectively control the recurrence.