Plant growth regulators are a class of pesticides used to regulate plant growth and development, including synthetic compounds and natural plant hormones extracted from organisms. When using a plant growth regulator, in order to achieve good results, first understand its use points, and secondly understand its precautions, as detailed below:
First, the main points of attention in the use of plant growth regulators:
1, the amount should be appropriate, can not increase the amount. Plant growth regulators are a class of substances that have similar physiological and biological effects as phytohormones and cannot be used in excess. Generally only a few grams or a few milliliters per acre. Some farmers are always afraid of less dosage and no effect. If they increase the dosage or use concentration at will, this will not only promote the growth of plants, but will also inhibit their growth, and even lead to leaf malformation, dryness and shedding, and whole plant death.
2, can not be mixed at will. Many vegetable farmers use the plant growth regulator to save time and often mix it with fertilizers, pesticides, fungicides, etc. Whether plant growth regulators and chemical fertilizers, pesticides and other substances can be mixed, must be carefully read and used after testing, can not be determined, otherwise it will not achieve the role of promoting growth or preservation of flowers and fruit, supplement fertilizer, but will be improperly mixed There is a phytotoxicity. For example, the ethephon solution is usually acidic and cannot be mixed with alkaline substances; the amine fresh ester is easily decomposed by alkali, and cannot be mixed with alkaline pesticides and chemical fertilizers.
3, the method of use should be appropriate. Some vegetable farmers often do not read the instructions carefully before using the plant growth regulator, but use the plant growth regulator directly for water. Whether it can be directly watered must be seen clearly, because some plant growth regulators can not be directly dissolved in water, if not prepared into the mother liquor and then formulated into the required concentration, the agent is difficult to mix, will affect the use of the effect. Therefore, it must be diluted in strict accordance with the instructions for use.
4. Growth regulators are not a substitute for fertilizer application. According to the pesticide network , the growth regulator is not a plant nutrient. It can only regulate the growth and cannot replace the use of fertilizer. In the case of insufficient water and fertilizer conditions, spraying too much plant growth regulator is harmful. Therefore, when plant growth is found to be poor, it is first necessary to strengthen the management of fertilization and watering, and on the basis of this, the growth regulator can be used to effectively exert its effects.
Second, plant growth regulator notes:
1. Strengthen the management of fertilizer and water.
1 Reasonable fertilization. Mainly based on organic fertilizer, supplemented by chemical fertilizer; heavy application of base fertilizer, appropriate amount of topdressing; focus on the application of nitrogen, phosphorus, potassium fertilizer and the use of micro-fertilizer; no fruit-sensitive fertilizer, regulate growth.
2 scientific management of water. The period of maintaining the fruit and improving the fruit setting rate is when the water demand of the fruit tree is high. If the soil is short of water, it should be timely watered and combined with fertilization. Do not pour water at noon on hot days, and should be done in the evening or in the morning.
2. Strengthen tree management.
1 thinning flowers and thin fruit. The fruit trees with too much flower and fruit are thinned and thinned, and the amount of flowers and fruits should be determined according to the specific tree potential, and the fruits, deformed fruits and overly dense fruits should be removed.
2 pressure control summer shoots. The fruit can be used to control the rapid growth of summer shoots by water spray or adopting new shoots to promote reproductive growth and increase production and income.
3 reasonable pruning. Pruning can reduce shading and enhance photosynthesis. It is usually combined after fruit picking or thinning and thinning, cutting off weak branches, dead branches, cross branches, diseased branches, short and strong branches to reach expanded fruit. the goal of.
3. Strengthen pest control.
1 Grab the prevention period. According to the law of occurrence and development of pests and diseases, seize the timely use of drugs in key periods of prevention and control to reduce pests and diseases.
2 Rational use of pesticides. The first is to choose low-toxic and high-efficiency pollution-free pesticides; the second is to prepare the concentration according to the instructions for pesticide use, and the concentration should not be too large; the third is to pay attention to the prevention and treatment methods, and the insecticide should not be applied during the flowering period, and the spraying should not be carried out in rainy or high temperature. Fruit tree sensitive pesticides.
Tips for China Pesticide Network : Scientific and rational use of drugs in strict accordance with the regulations, not only can save costs, but also get good drug effects.
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