Do not want cucumber pests and diseases to become more and more serious, it is necessary to prevent after planting, pay attention to summer in gardening
In the summer many greenhouses have been idle, some farmers in order to increase production and income, improve the use of soil, planted a crop of summer cucumber. However, it is very difficult to grow over the summer cucumber, greenhouse high temperature, strong light, dry air, cucumber roots weak, leaves scorched, often wilting, and pests also to the high incidence of the period.
After cucumber was planted, many farmers began to irrigate the root with rooting agent or seaweed essence, which promoted root system to root down, and improved the resistance of seedlings. In addition, do not want to cucumber disease the longer the more, after the beginning of the plant pesticide pest control. Many farmers asked, why not wait for the disease to occur before dosing it?
The planting of cucumber in summer is affected by environmental conditions, and there are many diseases and insect pests. If the control is not timely, the output of the greater impact. The common diseases in summer are virus disease, target spot disease, downy mildew, stem rot, root rot, powdery mildew and so on. The main pests are aphids, whitefly, Liriomyza huidobrensis and so on.
Cucumber diseases and insect pests are mainly prevented in advance. After the last crop was pulled, the substrate or soil should be treated in time to reduce the occurrence of soil-borne diseases and insect pests. The temperature and humidity in the greenhouse should be regulated to reduce the occurrence of diseases and insect pests. For example, virus disease, aphids in the high temperature and drought more serious, in the appropriate shade after planting, reduce the temperature of the shed, spraying can also reduce the temperature, improve air humidity.
After good field management, pest control is also the most important method. When a cucumber plant has two or three leaves, it starts spraying. The fungicides we used are difenoconazole and azoxystrobin compound fungicides, mainly for the prevention of stem blight, downy mildew and so on. The bacterial disease of cucumber was controlled by quinoline copper. To prevent cucumber virus disease, Lentinan, moroxydine hydrochloride and other agents.
Aphids, planthoppers resistance, just began to prevent the use of a single agent, such as thiamethoxam, furosemide, and so on, insect pests occur, and then use a mixture of pesticides. When spraying fungicide, together with Bihu, it is mainly used to regulate the growth of cucumber seedlings, which is beneficial to the growth of strong and improve disease resistance.
Cucumber in the control of diseases and pests, should pay attention to the concentration of medication. Because of the high temperature in the shed, and the seedlings are small, if the dosage is too large, it is easy to occur disease. Therefore, in the dosing can not be careless, in accordance with the required concentration of use, not repeated spraying, not blindly increase the amount.
Some farmers grow cucumbers, always listen to others say three or four days to play a medicine, spent a lot of artificial. In fact, for diseases and pests, to prevent-based, comprehensive control, can reduce the use of pesticides. Just like in the cucumber after planting, analysis of the diseases and insects often appear in different seasons, targeted pesticide prevention.