Anti-seasonal planting methods will have the growth habits of anti-season subcultures, and sometimes the pesticides used do not solve the same diseases that are out of season. The objective factors that come with anti-seasonality can sometimes achieve the small effect of radical cure without using pesticides. Like treating cucumbers and hi-sun plants, the temperature will be affected, and powdery mildew will continue to occur. Chemical pesticides can not cure it is to use the double treatment of physical and chemical bar. First, a reasonable release regulation light, temperature, humidity: 1, exposing the grass crickets: in principle, early exposing the evening to put grass rake, in the morning as long as the light can shine into the greenhouse to uncover the haystack, afternoon shed temperature dropped to about 20 degrees When covered with grasshoppers. Specifically, when the temperature was increased after the grasshoppers were lifted, it was too late to open the grasshoppers. When the grasshoppers were lifted, the temperature of the greenhouses still dropped after half an hour, indicating that the grasshoppers had been lifted prematurely. Normally, the temperature of the greenhouse began to rise within half an hour after the grass was lifted. If the weather is too late, it is too late to cover it. When it is cold and sunny, it is as early as the morning and early cover. When it is cloudy, it is covered with early cover. When it's clear over a long period of sunshine, it is gradually opened to avoid flashing seedlings. When the first wind was released after about an hour, it was not good for cucumbers to use the carbon dioxide accumulated at night to carry out photosynthesis and thus affect the formation of yield. Too late will not be conducive to the regulation of temperature. After this, according to the temperature requirements and actual changes at various times in the shed, air release control is performed. Note that when the temperature in the shed is too high, the temperature of the ban is too high and the temperature drops too fast so as not to harm the seedlings. Second, water and fertilizer regulation and promotion of growth: about 5 days after planting, depending on the situation determined to water the seedlings, the point is to pour small water; flowering as early as possible not to water, so as not to cause cucumber leggy; sit root melon, depending on the flood water, It is required that the relative humidity of the soil be maintained at 80-90% and the small water be poured. When watering roots and melons, 10 kg of urea can be topdressed. Later, in line with the principle of “less application of diligenceâ€, “water fertilization†or “water and fertilizer†is adopted. In the early stage, nitrogen fertilizers were the main components. During the middle and later stages, phosphorus and potassium fertilizers, calcium fertilizers, zinc and iron boron, and other trace elements were added, as well as organic fertilizers and biological bacterial fertilizers. Third, the use of pesticides to control the disease: winter and spring, when the temperature in the shed is below 20 degrees, the humidity is above 90%, under the influence of long-term conditions such as poor lighting, it will often cause gray mold, powdery mildew, angular spots Frequent and mixed hairy and downy mildew. Medication should be based on the principle of reasonable mixing, alternating use, you can control the occurrence of disease. 1. Pyrimethanil + Difenoconazole or Ether and Phenol are mixed to control gray mold, white powder, scab, etc.; 2. Propomethrin hydrochloride + difenoconazole, or Dimethomorphs + myclobutanil have control effect against downy mildew, white powder and scab; 3. Dimethomorphs + organic copper preparations, or dimethomorphs + agricultural streptomycins (mesocin, (Classomycin can be), effective against downy mildew, keratinella and other bacterial spot diseases; 4, when the disease has occurred, depending on the type of the main disease, one of the above formulas is selected and sterilized, and the sterilizing agent is sprayed every 3-5 days. In the class, another spray of the above formula is repeated 5-7 days later. This is used interchangeably. When no disease occurs, the medicine is sprayed every 7-10 days; when the disease occurs, the spraying time is shorter and the prevention and treatment are alternated. Through comprehensive utilization of the above three measures, it is believed that the cucumbers in the greenhouse will grow steadily and increase production.
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