Plant growth regulators are generally chemically strong. If they are not well kept, they will often cause problems such as degradation and failure, which will affect their normal regulatory functions for crop growth. Even when they are serious, they may cause side effects and lead to crop yield loss. Therefore, before applying plant growth regulators, the quality should be identified. According to the dosage forms of plant growth regulators, several simple methods of quality inspection are introduced to provide reference for farmers.
Crystalline powder products have complex production processes, good application effects, and strict storage conditions. They are most representative of gibberellin (90.2) and ABT rooting powder (increasing production spirit) and require drying and low temperature (even refrigerator refrigeration). Store under other conditions. When testing the quality of these drugs, take a small amount of medicine into a cup filled with clean water, stir it well, and let stand for half an hour. If the liquid is cloudy and cloudy, there is a trace of sediment on the bottom of the cup, indicating that the medicine has not failed. If the liquid is translucent or clear, it means that the agent has expired and cannot be used. In addition, the color of the crystalline powder can be visually observed, such as when the gibberellin crystalline powder is white in general, indicating no problem with the quality.
Dust powder is a common formulation of plant growth regulators. For example, vitality factors, powder strength increasing factor, chlorophyllin, and multi-failure are powders. Such dry powder medicaments should be free of moisture-absorbing agglomerates. If the hands feel damp, they can be pinched into groups, indicating that they have been deactivated; if they form a block, they indicate complete failure. In addition, the powder is generally more stable and the color does not change easily. If it is found that it fails to maintain its “natural†color, it indicates that the efficacy has changed.
Tablets Tablets are a new formulation of plant growth regulators, such as sweet potato swells and auxin. The easiest way to test the quality of a tablet is to measure it in water-soluble form, that is, put the tablet in a small amount of water. If the bubbles appear quickly, the quality of the tablet is gradually better as the tablet dissolves. If the tablet is placed in water without bubbles and it does not decompose, it indicates that the tablet has been wet and should not be used in production.
Aqueous solutions are a common type of plant growth regulators, and are widely used for their convenient use. For example, ethephon, triacontanol, mesityl, chlormequat, and the like are all packaged in water. The most important thing in identifying the quality of water agent is to observe whether there is any precipitate. For example, if the triacontan alcohol solution is found to have precipitated precipitation, it means that the direct application of water to the pesticide has lost its effect. Only the addition of triacontanol in the milk is added. Ethanol can be used after dissolution.
Most of the water-plant growth regulators currently on the market are compound-type, such as high-yielding spirit, high-yield-producing element, and spray-applied treasure. Because a certain amount of mineral elements or trace elements and organic matter are contained therein, it is easy to cause microbial pollution and lose its physiological activity. Therefore, before using such regulators, it is necessary to carefully check whether there is any contamination by microorganisms. If there is any pollution, it should stop. use.
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