Cultivation technology of green beans

Nowadays, green beans are planted in many farmlands, and when they mature, they are really a very delicious vegetable. So how are green beans cultivated?

sowing

(1) Sowing period and fertilization The suitable sowing period is from late May to early June. In our county, the previous crop is mostly garlic. Since the previous crop was fertilized at a high level, basal fertilizer is generally not applied to green beans. However, according to experiments, applying 20 to 30 kg of 45% triple compound fertilizer per mu can significantly increase yield and improve commercial quality.

(2) Mix the seeds with ammonium molybdate: Add 1-2 g of ammonium molybdate and appropriate amount of water to each kilogram of seeds and mix the seeds. Dry in the shade and then sow.

(3) Reasonable dense planting: 45 cm x 45 cm equidistant sowing, 2 seeds per hole, about 3 kg of seeds per mu, 3,300 plants per mu. Before sowing, 0.5-1 g of 3% furadan is placed in each hole to prevent underground pests, aphids in the seedling stage and soybean cyst nematode disease. When sowing, the soil should not be covered too deeply. After covering the soil, be sure to cover each hole with a layer of fine dry soil to facilitate germination.

Field management

(1) Management before germination: If there is heavy rain after sowing, pay attention to loosening the soil to facilitate the emergence of all seedlings.

(2) Management during the seedling stage: After the seedlings emerge, check and replant in time to ensure that all seedlings are fully grown. After 1 to 2 compound leaves, till the soil once, then thin out the seedlings manually, leaving only one seedling in each hole.

(3) Chemical weed control: Green beans have weak root regeneration ability, so it is not advisable to hoe too much or too deep. Chemical weed control can be carried out when the weeds are three to five leaves. For fields dominated by grass weeds, 5% grass essence 40-60 ml mixed with 30 kg of water can be sprayed evenly per mu; for fields where grass weeds and broad-leaved weeds grow together, 5% grass essence 40-50 ml plus 25% Huwei 30-50 ml mixed with 30 kg of water can be sprayed evenly per mu. It is not advisable to apply pesticides during drought.

(4) Management during the flowering and pod stage: Green beans require the most water and fertilizer at this time, and a certain water holding capacity should be maintained in the field. During the initial and final flowering stages, spray 0.25 kg of compound potassium dihydrogen phosphate or 1-1.5 kg of urea with 50 kg of water per mu once each.

(5) Pest and disease control Downy mildew is the main disease of green beans. It can be controlled by spraying 65% mancozeb 500 times or 75% chlorothalonil 700 times at the beginning of the disease in the field. Spray 50 kg of the solution per mu and spray again one week later. Bean borer and borer are the main pests that affect the commercial quality of green beans. Attention should be paid to their control. Control methods: spray 50 kg of 90% crystal trichlorfon 700 times or 40% omethoate 1500 times on bean pods per mu from the peak period of adult emergence (early August) to the peak period of larval hatching. For borer, 0.5-0.75 kg of 5% phorate granules mixed with 10-15 kg of fine soil per mu can be used to control adults during the peak period of moth emergence (around August 10); 30 ml of cypermethrin can be sprayed per mu during the peak period of larval hatching (around August 22).

Harvest

When the green beans enter the grain filling stage, they can be harvested. Generally, each plant is harvested once, and then graded and packaged.