How to deal with the rainstorm in vegetable production

Since mid-June, heavy to torrential rain has fallen many times in the middle and lower reaches of the Yangtze River, causing large areas of waterlogging in various places, and disasters of varying degrees have occurred in vegetable bases in various places, causing heavy losses to planting enterprises and farmers. In order to restore the current vegetable production and minimize the disaster losses, the following countermeasures are put forward.

Grabbing drainage and reducing stains

Dredge the three ditches, eliminate waterlogging, and ensure that the rain drains quickly, the rain stops the ditch is dry, and there is no stagnant water in the border ditch. For the low-lying inland river areas with high water level, we should organize electric pump drainage to speed up the drainage speed and lower the groundwater level. The flooded vegetable land should remove stagnant water in the field as soon as possible, vacate the ground, reduce the flooding time and reduce the degree of damage. To achieve the "three ditches" ditch communication, rain ditch dry, protect the healthy growth of vegetable roots, reduce waterlogging damage. Reduce the suffocation death of vegetables caused by stagnant water and waterlogging, and avoid vegetable strikes early.

Grab the management of vegetables in the field

Straighten the fallen vegetables in time, reduce the phenomenon of squeezing each other, and cultivate the soil and roots properly. Timely spraying foliar fertilizer, after the rainstorm, the ability of vegetable roots to absorb water and fertilizer is poor, at this time should be timely spraying foliar fertilizer, generally can use 0.2% potassium dihydrogen phosphate + 0.5% urea solution, can quickly restore the vitality of vegetables. Soil hardening after rain, ploughing and loosening soil in time when the soil is slightly dry, in order to improve soil structure and root activity. After the rainstorm, artificial water spraying should be carried out in time to wash the leaves. Where there is a well, it is best to use well water for sprinkler irrigation to wash the soil adhered to the stems and leaves.

For protected vegetables or seedling shed, rain shelter cultivation (that is, directly covering the top film or directly covering the sunshade net or one film plus one net) for shading and cooling can be adopted to prevent rainstorm erosion and sudden sunny and high temperature exposure after rain.

Prediction and control of diseases and insect pests

Agricultural extension departments at all levels should earnestly strengthen the prediction and forecast of diseases and insect pests, accurately grasp the trends of the occurrence and development of diseases and insect pests, strengthen the guidance of comprehensive prevention and control, reduce the harm of diseases and insect pests, and reduce losses. After the rainstorm, the field temperature and humidity are high, the plant resistance is weak, and it is easy to cause diseases and insect pests, so it should be protected and controlled in time. Carbendazim + enemy kill or chlorothalonil + kung fu and other broad-spectrum pollution-free types can be used, and pay attention to the safe interval. The main diseases and insect pests are: root rot, Fusarium wilt, downy mildew, blight, anthrax, powdery mildew, Bemisia Tabaci, bean wild borer, Plutella xylostella, Spodoptera litura and so on. The main control measures are as follows: timely clearing ditch and drainage, dredging "three ditches", reducing field humidity; timely removal of diseased plants (such as root rot, Fusarium wilt, blight, etc.) and deep burial out of the field Pesticide control is carried out after rain and sunny days: root rot and wilt can be controlled with thiophanate methyl, downy mildew and blight can be sprayed with thiophanate 800x or Klu 500x, anthracnose and powdery mildew can be sprayed with 1500 times of oxazole or 700x of methyl thiophanate or 1500 times of carbendazim. Bemisia Tabaci can be sprayed with 2000 times of avermiprimidine or 2000 times of permethrin or 1000-1500 times of matrine. Bean wild borer, Plutella xylostella, Spodoptera exigua and Spodoptera litura can be sprayed with 1500 times of doxorubicin or 1500 times of diflubenzuron or 2500 times of methylvitamin salt.

Timely replanting and replanting

For some fields with dead seedlings and lack of seedlings, we should actively guide farmers to do a good job in replanting and replanting fast-growing vegetables. At the same time, we should take practical measures to avoid rain and organize the breeding of autumn sowing vegetables such as cabbage, cauliflower, chili, tomato, eggplant, bottle gourd, cucumber, pumpkin, lettuce, celery and so on. Sow fast lettuce on the vacated ground: Chinese cabbage No. 5, Chinese cabbage, summer Chinese cabbage, lettuce, oil wheat, Guangdong cabbage, leaf potato tip, bamboo leaf, amaranth, celery, edamame bean, cowpea, radish, coriander, spinach and so on.

Pay attention to prevent secondary disasters

In the areas with high mountains and steep roads, attention should be paid to the harm of debris flow and landslides, and certain preventive measures should be taken to prevent secondary disasters. For facilities with loose feet caused by heavy rainfall and long soaking time, the facilities should be overhauled in time to prevent the greenhouse from collapsing.