Three effective ways to reduce the use of Cucumber drugs

The reason why cucumbers sometimes produce drug damage, from the prevention and control measures, one is the misuse of the wrong pesticide, the second is the application of excessive pesticide concentration or continuous repeated application of the same pesticide, and the third is the application of the same pesticide at high temperature or high humidity. fourth, soil application is not uniform.

From the point of view of the cultivation environment, first, there are continuous cropping obstacles of cucumber planting in the greenhouse, and the soil is full of latent pathogens or lack of some nutrient elements; second, the humidity in the greenhouse is too high and does not disperse moisture in time, which induces the breeding of diseases and pests, resulting in the weakening of cucumber resistance to diseases and insect pests, resulting in an increase in the number of drug use; third, the partial application of nitrogen fertilizer leads to excessive growth of cucumbers, serious shade in the greenhouse, and easy to induce diseases and pests, resulting in frequent use of drugs. Fourth, from the habit of cucumber itself, it is a shallow root crop, the root system is underdeveloped, the depth of penetration is shallow, and the root quantity is small, easy to Lignification. Among the melon crops, cucumber is the least drought-tolerant, and its ability to absorb nutrients is weak, so its immunity to diseases and insect pests is also weak.

In order to reduce or alleviate the losses caused by the application of pesticides in cucumbers cultivated in the greenhouse, the following work should be done in the prevention and control measures.

First of all, a good cultivation environment should be created. First, according to the growth habits of cucumber, fine soil preparation, so that its roots and strong seedlings; second, to open a good ditch to facilitate drainage and irrigation; third, to cover layers of film to facilitate temperature regulation and humidity control; fourth, balanced fertilization to promote stable growth; fifth, to avoid repeated cropping and implement rotation. After the change of cultivation environment, the occurrence rate of diseases and insect pests decreased relatively, and the frequency of pesticide application decreased accordingly.

Secondly, it is necessary to apply medicine according to the situation to solve the harm. Cucumber in addition to serious drug damage is difficult to remove, generally moderate or mild drug damage can be alleviated by fertilization and pesticide application. First, the leaf edge after application scorched or wrinkled, you can use Huimanfeng or Zhuang Fuxing active liquid fertilizer spray, the concentration of 1 ∶ 500 times 800 times liquid, because the liquid fertilizer contains activation substance "KOM", can remove pesticide residual toxicity, can quickly restore the growth of cucumber. Second, when the concentration of delayed plant growth regulator is too high, it can be sprayed with 30ml / kg gibberellin or 2000 times plant growth promoter "802"; third, when the plant is slightly wilted, 0.01%-0.02% brassinolide can be sprayed twice. Fourth, when the leaves are twisted and sagging, it can be sprayed with 1 ∶ of white sugar solution, which can quickly relieve the drug damage.

Third, we should take precautions to enhance cucumber resistance. In order to improve the resistance of cucumber to diseases, insects, weeds and drug pests, several basic work must be done. First, increase the application of rotten farm fertilizers or plant commercial organic fertilizers, or bio-organic compound fertilizers as base fertilizers, vigorously optimize the soil environment, improve the supply capacity of cucumber to fertilizer and water, inhibit bacteria, ward off insect pests, and reduce drug pests; second, choose the plant growth regulator 8000m 10000 times to spray 2 times before and after flowering. Third, the application of microbial agent Hongliang 600-800 times liquid, sprayed before flowering and young fruit stage, can prevent the invasion of bacteria, strengthen the physique, alleviate drug damage and promote growth recovery.