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Soil preparation: Choose loose, organic-rich soil, plant 25 cm deep, apply 3000-3500 kg organic fertilizer per hectare, and 30-50 kg compound fertilizer for beans. Land preparation is done, and the width is 1.6 meters (even ditch), and the drainage ditch is opened. Sowing from early July to early August, direct seeding, two rows of each seedling, spacing 80 centimeters, hole spacing 25 centimeters, 3 to 4 seeds per hole, 2-3 kg per acre. After sowing, straw or shade nets are covered to prevent heavy rain from scouring and to be removed in time after emergence.
Field management: After emergence, apply a small amount of compound fertilizer or apply urea to raise seedlings. The autumn cowpea grows in the hot season, watering in the afternoon, avoid flooding, rain for a long time. After flowering and poding, top dressing is applied 2-3 times, and 8-12 kg of compound fertilizer is applied per mu. Combined pest control spray 2-3 times foliar fertilizer. After taking the vines, take the “person†frame and promptly introduce the vines. Leading vines are conducted in the afternoon to prevent vines from breaking off. When the vine climbs to the top of the roof, it will be topping and promote the formation of flower buds.
Prevention of pests: rust, leaf mold, anthracnose, leaf spot, etc. are the major diseases of autumn cowpea. The main pests are aphids and soybean meal, which should be promptly replaced with medications.
Harvest: Autumn cowpeas mature faster, generally mature in 10-12 days after flowering, should be harvested in time to avoid consumption of nutrients after flowering scars. When harvesting, avoid damaging other buds on the inflorescence, and not even picking up the inflorescence stalk. This is not conducive to more flowering and more pods.
Variety selection: Ningjing No. 3, Baijing No. 2, Qiuyu 512, etc. should be selected for fall cultivation. The varieties of cowpea with strong resistance to diseases and good heat resistance can also be used for autumn cultivation in some spring varieties.