Plant growth regulators are synthetic organic compounds that have the function of promoting, inhibiting or otherwise altering a plant's growth process. Although it is a trace substance, it can exert a significant effect. However, improper use is often counterproductive, and reasonable use is a guarantee for the full use of its growth regulation function.
1. Select the appropriate type of growth regulator. Different plant growth regulators have different regulating effects on plants, some of them promote growth, some inhibit growth, and some slow down growth. They must choose the right ones according to the problems to be solved in production, the nature, functions and economic conditions of the regulators. Types of regulators, such as accelerated growth of selectable auxins, control of prolonged growth may be optional.
2. Pay attention to the response of different tree species and different species to growth regulators. The sensitivity of different tree species and varieties to regulators is different. Therefore, different regulators and concentrations should be selected accordingly. For example: apricot trees are not sensitive to multi-effects and the dosage should be increased. For example, when using multi-effects on plums, Chinese Li should not be used. It must be selected according to the species and response of the species.
3, pay attention to do small-scale test. Due to various factors such as climate, growth regulator quality, and dosage forms, uniform standards cannot be used when used. Different types of crops, different varieties, even if the same crop, the same species will also vary due to differences in the climate, soil, before large-scale treatment, we must first do a small-scale test to determine the appropriate type of modifier, concentration, dosage form To achieve scientific and rational use.
4, to configure the container to wash pharmaceuticals. Different regulators have different physicochemical properties such as pH, and the containers used for dispensing pharmaceuticals must be clean and clean. Containers that have been used to hold alkaline chemicals will fail when they are not cleaned, and they will fail when they contain acidic chemicals. For example, the use of Qingxinsu in production generally has a high concentration. If there is any residue, it is not cleaned, and when it is used to treat low doses to prevent fruit drop, it will cause fruit trees to defoliate and drop fruit, and the opposite effect will be obtained.
5, pay attention to the use of time and time. Growth regulators play a role in the growth and development of plants, and they must be used during the period of use. Premature or premature effects are not obtained. For example: naphthalene acetic acid used as a fruit-shearing effect in young fruit, but before harvesting fruit can be used to prevent fruit drop before harvest. Be sure to apply it at a suitable time. Pay attention to the time of use. It is usually better before 10 o'clock in the morning on a sunny and windless day. Do not use it on rainy days.
6, pay attention to choose the appropriate concentration and dosage form. The activity of growth regulators is strong, and the appropriate concentration should be selected when using them. If the concentration is too low, it will not be effective, and if it is too high, it will have the opposite effect. For example, 24-D promotes growth at low concentrations, is unisexually strong, and kills plants at high concentrations. At the same time, the appropriate dosage form should be selected. Generally, the water agent should be sprayed and the soil should be powdered.
7, pay attention to use. According to the mode of action of the regulator into the plant body, for example: multi-effect maggots absorbed through the roots, can be applied to the soil, more stable in the soil than the long-term, long residual period, and easy access from the foliage, spray available.
8, pay attention to the treatment site. According to the nature of the problem, the site of treatment is decided. For example, with 24-D anti-dropping and fruit-dropping, apply chemicals to the flowers to suppress the formation of layers. If 24-D is used to treat the young leaves, damage will occur. Another example is the use of naphthalene acetic acid or ethephon to stimulate the flowering of pineapple, the liquid can be poured into the cylindrical heart, direct stimulation of inflorescence differentiation, rather than soil irrigation or spraying.
9. Pay attention to changes in fruit trees and climate. The general good growing concentration may be slightly higher, the growing general concentration, the growing weaker concentration is slightly lower, or even not used. The temperature has a great influence on the regulator. When the temperature is high, the reaction is fast. When the temperature is low, the reaction is slow. Therefore, the concentrations used in winter and summer seasons should be different.
10, pay attention to the number of times and dosage. According to the plant's response to determine the use of the number of times, usually once, but if the effect is not good it must be many times, very sensitive to the reaction can be a small number of times. For example, if you want to control apple saplings for a long time, you need to use 2-3 times for every 10 days. The dose used must also be controlled, such as spraying water on a wet basis.
11, using a variety of agents with use. Sometimes production needs to solve several problems at the same time and it can be used together. The use of a mixture of chemical reactions that can not afford each other has the effect of avoiding weaknesses and doing more with less. For example, for the early pear supply period, when using ethephon ripening, in order to avoid causing fruit drop, it can be mixed with naphthalene acetic acid. However, some agents, such as butyrate, 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 indole acetic acid see light decomposition, Feng fruit music, West Wei due to alkali met acid failure, methyl naphthyl acetate volatile, must be properly stored according to their physical and chemical properties, otherwise Will reduce the efficacy.
13. Pay attention to the cooperation of various agricultural technologies. Growth regulators only play a role in the growth and development of plants and cannot replace fertilizers, pesticides, and other farming practices. They must be applied to agricultural production to achieve the desired results, and must be coordinated with other agricultural technical measures. For example, the use of naphthaleneacetic acid, indole acetic acid treatment cuttings to promote rooting, we must maintain a certain humidity and temperature within the seedbed, otherwise it is difficult to guarantee rooting.
In short, the application of growth regulators in fruit trees must be "active and prudent" and comprehensive consideration of all factors can achieve the goal.
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