What to pay attention to when applying plant growth regulators to fruit trees

What should fruit trees pay attention to when applying plant growth regulators? Plant growth regulators are synthetic organic compounds that can promote, inhibit or otherwise change a plant growth process. Although it is a small amount of substance, it can produce obvious results. However, improper use often goes against one's wishes, and reasonable use is the guarantee to give full play to its function of growth regulation. 1. Select the appropriate kinds of growth regulators. Different plant growth regulators have different regulatory effects on plants, some promote growth, some inhibit growth, and some delay growth. It is necessary to select appropriate regulators according to the problems to be solved in production, the properties, functions and economic conditions of regulators, such as accelerating growth optional growth, controlling growth can be selected to delay growth. 2. Pay attention to the response of different tree species and varieties to growth regulators. Different tree species and varieties have different sensitivity to regulators, so different types and concentrations of regulators should be selected accordingly. For example, apricot trees are not sensitive to multi-effect trees, and the dosage should be increased. For example, when using multi-effect trees on plums, Chinese plums are not suitable for use. They must be selected according to the response of tree species and varieties. 3. Pay attention to doing small-scale experiments. Due to the climate, the quality of growth regulators, dosage forms and other factors, it can not be used according to a unified standard. Different kinds of crops, different varieties, even the same crop and the same variety will be different due to different climate and soil. before large-scale treatment, small-scale experiments must be done to determine the appropriate type, concentration and dosage form of regulators. to achieve scientific and rational use. 4. The container with medicament should be washed. Different regulators have different acidity and alkalinity and other physical and chemical properties, the container of the medicament must be clean and clean. Containers filled with alkaline agents will fail without washing acidic agents; after containing regulators that inhibit growth, promoters will not be effective. For example: the use of fresh in production, generally high concentration, if there are residues, without cleaning, used to deal with low doses to prevent fruit drop, will cause fruit tree leaf drop and fruit drop, get the opposite effect. 5. Pay attention to the period and time of use. Growth regulators play a role in a certain link of plant growth and development, the use period must be appropriate, too early or too late can not get the ideal effect. For example, the use of naphthylacetic acid plays a fruit-thinning role in the young fruit stage, while the use before harvest can prevent fruit drop before harvest. Must be applied in the appropriate period, and pay attention to the time of use, generally better before 10:00 in the morning on sunny and windless days, and do not use it on rainy days. 6. Pay attention to the selection of appropriate concentration and dosage form. The activity of growth regulator is strong, and the appropriate concentration should be selected when it is used. Too low concentration will not work, and too high concentration will have the opposite effect. For example, 24Mel D can promote growth at low concentration, parthenocarpy, and kill plants at high concentration. At the same time, we should also choose the appropriate dosage form, generally spray water agent, and use powder in soil. 7. Pay attention to how to use it. The mode of use is selected according to the way in which the regulator enters the plant, for example, it is absorbed through the root and can be applied into the soil, which is more stable in the soil for a long time, and the residual period is long, and it is easy to enter from the leaf surface, which can be sprayed. 8. Pay attention to the treatment site. Determine the location to deal with according to the nature of the problem. For example, if 24Mel D is used to prevent flowers and fruits from falling, the medicine should be applied to the flowers to inhibit the formation of abscission layer. If the young leaves are treated with 24Mel D, it will cause damage. If naphthylacetic acid or ethephon is used to stimulate pineapple blossom, the liquid can be poured into the tubular heart leaves to directly stimulate inflorescence differentiation, rather than soil irrigation or spraying. Pay attention to the growth of fruit trees and the change of climate. Generally, the concentration of good growth can be slightly higher, while that of general growth can be slightly higher, and that of weak growth should be slightly lower, or even not. The temperature also has a great influence on the regulator, the reaction is fast when the temperature is high, and slow when the temperature is low, so the concentration used in winter and summer should be different. 10. Pay attention to the frequency and dose of use. According to the response of plants to determine the number of times, generally once, but if the effect is not good for many times, very sensitive to the reaction can be a small number of times. For example, controlling the growth and promoting flowers of young apple trees for a long time should be used 2-3 times every 10 days. The dose used should also be controlled, such as the water agent is sprayed with humidity. 11. Use a variety of agents to use together. Sometimes several problems need to be solved at the same time in production, which can be used together. The mixed use of non-chemical reactions can give full play to the strengths and avoid weaknesses and get twice the result with half the effort. For example, in order to advance the supply period of pears, ethephon is used to accelerate ripening, and can be mixed with naphthylacetic acid to avoid fruit drop. However, some agents, such as butyrylhydrazide, should not be mixed with other alkaline agents, otherwise the effect will be affected. 12. Pay attention to the storage of growth regulators. Many plant growth regulators themselves are not very stable, such as the photodecomposition of indole acetic acid, the failure of Fengguole and Xiwei due to acid, and the volatility of methyl naphthyl acetate, which must be stored properly according to its physical and chemical properties, otherwise the efficacy will be reduced. 13. Pay attention to the cooperation of various agricultural technologies. Growth regulators only play a role in a certain link of plant growth and development, and can not replace fertilizers, pesticides and other farming measures. in order to achieve ideal results in agricultural production, we must cooperate with other agricultural technical measures. For example: with naphthalene acetic acid, indole acetic acid treatment cuttings to promote rooting, it is necessary to maintain a certain humidity and temperature in the seedbed, otherwise rooting is difficult to guarantee. In a word, the application of growth regulators in fruit trees must be "active and prudent", and all factors should be considered comprehensively in order to achieve the goal. Click to view more regulator use techniques click to view more pesticide use techniques click to view more fruit tree planting techniques