With the arrival of summer, the high temperature and rainy weather gradually increase, vegetables are prone to pests and diseases, and cultivation and management are more difficult. Field management should be strengthened from the following aspects to achieve high quality, high yield and high efficiency.

First, pay attention to strengthening fertilizer management

At present, most of the summer vegetables are in a critical period of growth, and a small part has entered the harvesting period. At this time, proper management of fertilizer and water has a great impact on the high yield, high quality and high efficiency of vegetables. Fertilization should follow the principle of “multiple application of organic fertilizer and less application of chemical fertilizer”. Fertilization should be targeted. Leafy vegetables (cabbage, celery, etc.) should be based on nitrogen fertilizer and calcium fertilizer, supplemented by potassium fertilizer, phosphate fertilizer and some medium and trace elements (calcium, zinc, magnesium, etc.), with certain foliage. Fertilizer (potassium dihydrogen phosphate, etc.); melons and fruits (watermelon, melon, tomato, etc.) should be mainly phosphorus and potassium fertilizers, supplemented by nitrogen fertilizer, increase the application of some medium and trace element fertilizers; root vegetables are mainly potassium fertilizer, supplemented by Take phosphate fertilizer and medium and trace element fertilizer. Watering and drainage should be done properly. The summer temperature is high and the rainfall is uneven. Pay attention to strengthen watering and small water during the drought, and keep it dry. When the precipitation is large, pay attention to drainage and digging the drainage ditch. In particular, root vegetables (radish, etc.) and melons are greatly affected, and water accumulation is likely to cause problems such as scalding, rooting and rot. At the same time, after the heavy rain (in the case of good drainage), some groundwater is poured to lower the ground temperature, and watering can be combined with fertilization.

Second, pay attention to strengthen field management

1. Weeding in summer is hot and rainy, which is beneficial to weed growth. Always weed and weed, do not loosen the soil, so as not to hurt the roots. Try not to use herbicides, which have a great impact on the growth of vegetables. If you choose improperly, you can even affect vegetables for more than two years.

2 , ridges, ridges and summer rains, drainage is the key, for ridge vegetables (such as cabbage, green onions) due to rain or watering caused damage to the ridge, timely ridges of vegetables should be based on vegetable growth Actual situation, timely ridges, so that the drainage is smooth, no water accumulation, reducing disease.

3 , plant finishing for the vegetables (such as cucumber, beans, tomatoes, etc.), planting in time (snoring, picking old leaves, diseased leaves), in order to facilitate ventilation, light transmission, improve the fruit set rate; for watermelon Pumpkins and other vegetables should be kept in a reasonable way. The control group should not be too large, so as to enhance the disease resistance. The watermelon should be turned over in time to make the color even and improve the commodity rate.

Third, pay attention to strengthen pest control

Summer vegetables are prone to more pests and diseases, mainly buckwheat, viral diseases, soft rot, downy mildew, root rot, powdery mildew, bean wild mites, mites, etc., as well as some physiological physiology such as cracked fruit, fruit drop, poor growth, etc. Disease. Adhere to the principle of “prevention of prevention and treatment as a supplement” and strongly advocate the use of biological pesticides.

1. Cucumber: The most common pests and diseases are blight, downy mildew, aphids and so on. Fusarium wilt can be controlled by 20% withered; the downy mildew can be controlled by Anke, DuPont, etc.; the aphids can be controlled by imidacloprid.

2 , watermelon: summer pests and diseases are mainly viral diseases, blight, root rot, powdery mildew, aphids, etc., viral diseases can be controlled by virus clearing, green growth regulator; blight can be treated with 20% withered special treatment Root rot can be controlled by all diseases and procymidone; powdery mildew can be controlled by triadimefon; aphids can be controlled by imidacloprid and mites.

3 , pepper: susceptible diseases are mainly viral diseases, blight, beet armyworm, cabbage caterpillars and so on. The virus disease can be controlled by virus clearing and green regulating agents; the wilt disease is controlled by 20% withered; the beet armyworm and cabbage caterpillar generally occur heavier, and can be sprayed with Guardian emulsifiable concentrate 3000 times and Avi high chlorine.

4 , cabbage, cabbage: susceptible to pests and diseases mainly include soft rot, aphids, cabbage caterpillars. Soft rot is a bacterial disease, which can be sprayed with drugs such as 47% rigon WP 800 times or streptomycin sulfate; mites and cabbage worms can be controlled with avermectin and av.

5 , other vegetables: celery spot disease can be sprayed with 10% Polaroid WP 1000 times liquid: cowpea, Bean Bean Wild Bean (Vigna Bean) can be sprayed with 2.5% deltamethrin or 2.5% verbacean emulsifiable concentrate.

6. Physiological diseases: such as cracked fruit, fruit drop, poor growth, etc., according to the cause of the disease, strengthen the field management, supplement the medium and trace element fertilizers such as yellow leaves, green spray, Le Bangong, Dadeng, etc. to prevent.