Before spraying

Reduce the source of disease and insects, clean up diseased leaves, diseased branches, diseased fruits and even diseased plants (the source of infection for most diseases), and take them out of the field for burning treatment, and the spraying effect will naturally be better.

Choose the spraying time, whether it is plants, pests or germs, they all have a suitable activity temperature, which is about 20℃～30℃, 25℃******. At this time, spraying is not only safe for crops, right Diseases, pests and weeds in the active phase will also be effective.

In hot weather, the medicine should be sprayed before 10 am and after 4 pm; in cool weather, the medicine should be sprayed after 10 am and before 2 pm.

If you choose suitable pesticides for disease prevention, you must first treat the symptoms and then prescribe the drugs, know which drugs to use, do not use them indiscriminately, and recognize the difference between the drugs for fungal diseases and bacterial diseases; secondly, you must rotate the drugs instead of using the same one blindly. Medicament. If it is insect control, it is necessary to first apply medicine to insects, taking into account the killing of adults, eggs, larvae or nymphs, thereby reducing the source of insects; secondly, it is necessary to rotate the medication, do not blindly use the same medicine to prevent the increase of insect resistance and reduce the efficacy .

When spraying medicine

Master the spraying method. For pests that like to harm a certain part of the plant, focus on this part (such as the back of the leaves, the fruit, the flower, the base of the stem, etc.) when spraying the pesticide.

Grasp the spraying distance, such as the nozzle of the knapsack electric sprayer and the target should be kept 30-50 cm; the motorized sprayer should be kept at about 1 meter. When people walk slowly when taking medicine, the liquid medicine is easy to concatenate, and some parts will not be able to take medicine when they go fast. Therefore, you must grasp the walking speed and find a routine that suits you.

Adjust the droplet size according to the performance of the sprayer and its nozzle, and adjust the suitable droplet size. When controlling diseases and small pests such as aphids and whitefly in greenhouse vegetables, you can choose a smoke machine.

After spraying

Pay close attention to the pests and diseases. One or two days after spraying the pesticides, it is necessary to promptly inspect the degree of pest control in the field, so as to determine whether or not to spray again, what kind of drugs, etc.

Special attention: Take protective measures for vegetables before rain and after rain, and timely drainage, pay attention to spraying medicine (protection + treatment), timely clean up diseased plant residues, and reduce the source of infection.

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