How to use plant regulators scientifically? Do you think it's weird?

Plant growth regulator is an agricultural input that can regulate plant growth and development. They are listed as one of the four categories of managed pesticides, which are produced by artificial synthesis or microbial fermentation, and can also be directly extracted from plants, commonly known as plant hormones. Its functions are so extensive that many farmers and even experts strongly recommend it, such as spraying spots, flowers, roots and fruits that promote growth, which seem to be inseparable from regulators anyway.

Is it really good to use so many regulators? Because plant growth regulators are called "plant hormones", their functions are similar to those of "animal hormones". Reasonable use can indeed achieve satisfactory practical results, but excessive use or even abuse will easily lead to fertilizer damage to food crops, endanger yield and quality, and increase product costs and capital investment. Two years ago, the top flower towel gourd and explosive watermelon were classic negative examples of excessive use of air conditioners.

What should we pay attention to in scientific use? There are many kinds of plant growth regulators, and their physiological functions and biological activities will vary greatly due to different types, concentration values, operation methods, application stages and physiological and climatic conditions of plants. Therefore, it must be used in strict accordance with the method and concentration value strongly recommended by the actual variety to prevent the expected effect from being failed or causing side effects such as fertilizer damage.

First of all, we must master the stage suitable for use. In the application materials of plant growth regulators, it is clearly stipulated that the application must be carried out at the stage when the drugs can give full play, so that the dream and practical effect of saving drugs and preventing fertilizer damage can be achieved.

For example, spraying auxin at the flower bud differentiation stage of citrus will inhibit bud production, while spraying auxin at the young fruit stage of citrus can improve fruit setting rate. The application of clofenuron at the flowering stage of melon will have the effect of keeping flowers and high yield, but taking it late may endanger the yield. When using thiabendazole to defoliate, it should be sprayed when cotton bolls and peaches naturally vomit 50%. If used too early, cotton yield and quality will be reduced.

Second, at the same time, the concentration value and application frequency should be strictly controlled. The amount of plant growth regulator is small, and the effect is remarkable. The concentration value used should be strictly configured according to the crops on the label and the purpose of adjustment, and the dosage and water flow should not be increased at will. The confirmation of pesticide application frequency is based on pesticide labels. Most plant growth regulators are applied once during the plant growth period, while some drugs are sprayed several times.

For example, brassinolide promotes the growth and development of red grapes, tomatoes, loofah and other vegetables and fruits, and must be applied many times during the whole growth period. Some farmers usually think that the greater the dosage, the better the application times. In this way, plant growth regulators can't play their due role, which increases the cost of medicine, and it is easy to limit the yield and endanger the quality of crops.

Third, it is necessary to decide whether to spray plant growth regulators according to plant growth and fertilizer and water conditions. For example, in mepiquat chloride, the cotton fields with good liquid fertilizer standard and rising trend are not suitable for use, the cotton fields with dry temperature and no guarantee of irrigation are not suitable for use, and they cannot be used when the rising trend is not good or the growth and development of cotton wool are inhibited.

Four, in addition, choosing the appropriate application standard can give full play to the practical effect of getting twice the result with half the effort. The place with no wind, clear sky and Wan Li and suitable temperature and humidity should be selected to prevent the use of plant growth regulators before precipitation and in bad weather. Application in greenhouse should be carried out in the morning without high temperature.

5. Do not use the reserved land. Growth regulators such as ethephon and auxin are used in vegetables, fruits, cotton wool, wheat and other crops, which have the effect of promoting maturity and high yield, but at the same time, it will lead to an increase in non-booting stage and a serious decline in seedling emergence rate. Therefore, all planted crops should be carefully used with growth regulators.

Finally, if the plant growth regulator is accidentally misused, such as spraying the wrong agent, inappropriate application time or timing, it should be washed with clear water quickly, and at the same time, attention should be paid to strengthening the water and fertilizer management of the misused agent to restore its growth as soon as possible.