The goal of cowpea planting in summer is to ensure the good commodity of products. In the process of planting, we should pay attention to the selection of disease-resistant and high-yield varieties such as Qili cowpea, Quanwang cowpea, Qili Zaosheng and Chimei. Let's talk about the key points of cowpea planting technology in summer.

Variety selection of cowpea planting in summer

On the basis of ensuring the proper color of pod strips, no seed bulging at high temperature and strong disease resistance, try to choose high-yield varieties. The following are several excellent cowpea varieties.

Qili cowpea: the pod is green, and the seed does not bulge at 38℃, and the pod color does not turn white. Strong ability of continuous pod setting, high yield, strip length of 65~75 cm, strong disease resistance. The disadvantage is that the pods become shorter and curved at low temperature. Sowing in the Yellow River basin from April 20th to June 30th, sowing in the Yangtze River basin from mid-April to early July, sowing in northern Guangxi from early April to early August, sowing in spring and summer in Zhejiang and Fujian, and sowing in spring in Leizhou Peninsula.

Quanwang cowpea: the pod is green and white, with high yield, strong adaptability, no bulging seeds at high temperature and no bending at low temperature. The pod is about 70 cm long. It is suitable for spring sowing in North China and Northwest China, spring sowing in Yellow River valley, Yangtze River valley and Yunnan-Guizhou Plateau, early spring sowing in Leizhou Peninsula and winter sowing in Hainan.

Qili is born early: the pod is green and white, with thick meat, extremely high yield, with a pod length of about 80 cm and outstanding low temperature tolerance. The pod length can still reach 70 cm at l3℃. The disadvantage is that it is susceptible to diseases at seedling stage. Suitable for planting in areas with less rainfall.

Management techniques of cowpea in seedling stage

In summer, the seedling cultivation period is very short, only l5~20 days from emergence to vine throwing. The key points of management are disease prevention and fertilizer control. Generally, 40 ml of 10% myclobutanil EC is used for root irrigation to control cowpea-based rot.

Management method of cowpea in climbing period in summer

Water and fertilizer control is the main management from vine-throwing to full-climbing, and the soil should be kept in a state of yellow moisture, that is, the soil moisture content is 60%~70%. Do not apply fertilizer, especially nitrogen fertilizer, before half-climbing. Pay attention to the prevention and control of pests and diseases. Generally, 60 ml Chlordecone benzamide mixed with l0% myclobutanil is sprayed. When the rainfall is heavy, it is necessary to add protective fungicides such as Dakoning (chlorothalonil) or Daisenlian. When the growing point of the plant exceeds the frame, the core should be picked in time.

Key management techniques of cowpea in pod setting period in summer

First, strengthen the management of water and fertilizer, and apply enough nitrogen fertilizer, but the amount of one-time fertilization should not be too much, and the fertilization position should not be too close to the plant. Too close or too much will easily lead to defoliation and rat tail. Generally, 10 ~ 15 kilograms of urea should be applied to 667 m2, 40 cm away from the plant, and it should be watered in time after application.

Second, use drugs reasonably and safely to control pests, and prohibit the use of highly toxic pesticides. Generally, spraying chlorantraniliprole for 7 days can kill 95% of pests with little residue.

Third, prevention and treatment of diseases, mainly anthracnose and leaf spot in the early stage, and powdery mildew in the later stage. Generally, therapeutic agents and protective agents are mixed, such as bromothalonil Shidakoning and myclobutanil-10, and triadimefon is prohibited, so as to ensure that the drugs are sprayed all over after a rain or once a week.

Fourth, rational use of foliar fertilizer can make the pods more beautiful. Generally, when preventing diseases and pests, potassium nitrate and sodium nitrophenolate are mixed, and commonly used foliar fertilizers include high potassium treasure.