In-depth Demand Report | Disassembling Plant Pgr

Title: Plant Growth Regulators Category: Pesticide Sources: China Plantation Grand View · Pesticide Rolls Plant growth regulators are a class of substances that have similar physiological and biological effects as plant hormones.It has been found that substances regulating plant growth and development are amine fresh ester (DA-6), chlorpyrifos, sodium nitrophenolate, auxin, gibberellin, ethylene, cytokinin, abscisic acid, brassinolide. Salicylic acid, jasmonic acid, paclobutrazol and polyamines, etc., and used as plant growth regulators in agricultural production are mainly in the top nine categories.

Plant growth regulators are the product of comprehensive development of various scientific technologies such as organic synthesis, microanalysis, plant physiology and biochemistry, and modern agriculture, forestry and horticulture. In the 1920s and 1930s, traces of natural plant hormones such as ethylene, 3-indole acetic acid and gibberellin were found in plants, which have the effect of controlling growth and development. In the 1940s, research on synthetic analogues began, and 2,4-D, amine fresh ester (DA-6), chlorpyrifos, sodium nitrophenolate, α-naphthylacetic acid, and bud-dan were gradually developed. Promote use and form a category of pesticides (see table). More than 30 years of artificial plant growth regulators have been synthesized, but due to the complicated application technology, their development is not as rapid as pesticides, fungicides and herbicides, and the application scale is also small. However, from the perspective of the needs of agricultural modernization, plant growth regulators have great potential for development, and there has been a trend of accelerated development in the 1980s. China has been producing and applying plant growth regulators since the 1950s.For the target plant, the plant growth regulator is an exogenous non-nutritive chemical that is usually transported to the site of action in the plant and promotes or inhibits certain aspects of its life process at very low concentrations. To meet the needs of human development. Each plant growth regulator has a specific use, and the application technology requirements are quite strict, and specific effects can be exerted on the target plant only under specific application conditions (including external factors). Frequent changes in concentration result in opposite results, such as a promotion at low concentrations and inhibition at high concentrations. Plant growth regulators have many uses, depending on the variety and target plant. For example: control germination and dormancy; promote rooting; promote cell elongation and division; control lateral buds or tillers; control plant type (short-strong anti-fall); control flowering or sex ratio, induce no fruit; flower thinning, control fruit drop Control the shape or maturity of the fruit; enhance stress resistance (resistance, drought resistance, salt tolerance, antifreeze); enhance the ability to absorb fertilizer; increase sugar or change acidity; improve flavor and color; promote latex or resin secretion; Or evasive (for easy mechanical harvesting); preservation and so on. Some plant growth regulators are herbicides used at high concentrations, and some herbicides have growth regulation at low concentrations.

1. The dosage should be suitable, and the dosage should not be increased arbitrarily. Plant growth regulators are a class of substances that have similar physiological and biological effects as plant hormones and cannot be used in excess. Generally only a few grams or a few milliliters per acre. Some farmers are always afraid that the amount of use is small, and there is no effect. If you increase the dosage or use the concentration at will, it will not promote the growth of the plant, but will inhibit its growth, and even lead to malformation, dryness, and death of the whole plant.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 fruits, supplement fertilizer, but will be improperly mixed A phytotoxicity has occurred. 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 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 with 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. Growth regulators are not plant nutrients. They can only regulate growth and cannot replace fertilizers. 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.5. Plant growth regulators are pesticide products. The product packaging must have a formal "three pesticides" and the labeling zone is yellow.6. Strictly follow the instructions and take protective measures to prevent the impact on people, livestock and water safety.

Glyphosate is a popular herbicide used to control a wide range of weeds. However, if you're planning to plant vegetables or other crops in an area where you've recently applied glyphosate, it's important to know how long you should wait before planting. The waiting period depends on several factors, including the type of glyphosate used, the soil conditions, and the specific vegetables you're planning to plant.
Glyphosate and Its Effect on Soil
Glyphosate is a systemic herbicide that is absorbed by the plants and interferes with their ability to produce essential proteins. Once applied, glyphosate is typically broken down in the soil by microbial activity, which reduces its residual effects over time. The breakdown process can vary depending on environmental factors such as temperature, soil type, and moisture.
Because glyphosate is designed to target plants, it does not usually harm soil directly. However, it is important to allow time for the herbicide to degrade before planting sensitive crops, such as vegetables, to avoid potential damage.
General Guidelines for Planting Vegetables After Glyphosate Use


Wait Time Recommendations

For Annual Vegetables (e.g., tomatoes, lettuce, carrots): A waiting period of 7 to 14 days is typically recommended before planting annual vegetables after applying glyphosate. This allows enough time for the herbicide to break down in the soil, reducing the risk of damage to your crops.
For Perennial Vegetables (e.g., asparagus, rhubarb): Perennial vegetables may require a longer waiting period of 2 to 3 weeks, as they are more sensitive to residual herbicide in the soil.



Soil and Environmental Conditions

Soil Type: The breakdown rate of glyphosate can vary based on the type of soil. Sandy soils may allow the herbicide to break down more quickly, while clay or loamy soils may retain it for a longer period. If your soil is particularly heavy or compacted, you may need to wait longer before planting vegetables.
Moisture and Temperature: Warm, moist conditions promote faster breakdown of glyphosate, while cooler or drier conditions may slow the degradation process. If you’ve applied glyphosate during a dry period, consider waiting a bit longer to ensure that the herbicide has had enough time to dissipate.



Replanting Guidelines

Most labels for glyphosate recommend that gardening or planting of vegetables should occur at least 7 days after the application of the herbicide. However, always check the specific instructions on the product label for precise guidance, as there can be slight variations depending on the concentration and formulation.



Key Considerations for Safe Planting After Glyphosate Use


Application Rate and Concentration

The concentration of glyphosate you use will affect the residual levels in the soil. A more concentrated solution may take longer to break down, so if you’ve used a strong dose, it's best to wait a little longer before planting.



Weed-Free Area

If you’ve used glyphosate to clear an area of weeds before planting, make sure the area is thoroughly dry and free of any visible herbicide residue before sowing your seeds or transplanting seedlings.



Follow Product Label Instructions

Always follow the guidelines provided on the herbicide product label for the best results. Glyphosate manufacturers usually provide specific replanting intervals based on field trials, which will be your safest bet.



Symptoms of Glyphosate Damage in Vegetables
Even with the proper wait time, if you plant vegetables too soon or the soil retains too much of the herbicide, you may notice the following symptoms of glyphosate damage:

Yellowing or wilting of plant leaves
Stunted growth or deformed plants
Root damage, especially in sensitive crops like tomatoes, peppers, and cucumbers

If you observe these signs, it may be necessary to wait longer or amend the soil to reduce herbicide residue.
Conclusion
In general, it’s safe to plant vegetables 7 to 14 days after applying glyphosate, depending on the type of vegetable and environmental conditions. For more sensitive plants or those in heavier soils, a waiting period of up to 3 weeks may be required. Always check the product label for the most accurate and up-to-date replanting guidelines to ensure the health and safety of your crops.