With the rapid development of agriculture , the amount of pesticides has also increased significantly. The specialization of the spraying of pesticides has been increasingly valued by farmers. It is very important to strengthen farmers' control of pests and diseases and correct spraying of pesticides.
The scallions are waxy vegetables with a layer of white powdery wax on the surface of the leaves. In the prevention and control of pests and diseases, because the surface of the leaves has a layer of wax, the sprayed liquid is in the form of water droplets, which cannot be infiltrated into the interior of the plant and is lost, which does not achieve the desired control effect. So how do we spray it? Today, Xiaobian will give you a summary.
First, take the washing powder or soap with a weight of 0.1%, dissolve it thoroughly with warm water, and use it as an additive for the liquid. When the liquid is poured into the sprayer 1/3, add the additive, and then add a sufficient amount of water to spray.
However, it should be noted that some pesticides will reduce and lose control effects when mixed with washing powder, such as stone sulphur, zinc, thiophanate, and thiophene. The pesticides that must be used immediately after mixing are dimethoate, malathion, and the like.
Disclaimer: The above pesticide information is extracted from the Internet and has nothing to do with the China Pesticide Network . If there is any infringement, it will be deleted immediately.
Trace elements include nutrients such as boron, zinc, molybdenum, iron, manganese and copper. Although plants require very little trace elements, their effects on plant growth and development are as important as large amounts of elements. When a trace element is lacking, crop growth and development are significantly affected, yield is reduced, and quality is degraded. On the other hand, too much trace elements can poison crops, affecting yield and quality, and even endangering human and animal health in severe cases. With the continuous increase of crop yield and the large-scale application of chemical fertilizers, the application of trace element fertilizers has become increasingly urgent. Among the trace element fertilizers, iron, manganese, zinc, Copper Sulfate, boric acid, molybdic acid and monovalent salts thereof are usually used.
Chemical fertilizers are usually divided into two types: macro element fertilizers and trace element fertilizers. What are the constant elements of Fertilizer? The macro element fertilizer is a fertilizer that consumes a large amount of crops, such as nitrogen fertilizer, Phosphate Fertilizer, potassium fertilizer, calcium fertilizer, magnesium fertilizer, and sulfur fertilizer.
Trace element fertilizer, often referred to as micro-fertilizer. It refers to fertilizers that contain micronutrients, and the crops consume less (relative to the constant element fertilizer). Although crops require very little trace elements, they are as important to crops as macromolecules and cannot be replaced. The application of micro-fertilizer should exert its fertilizer efficiency on the basis of nitrogen, phosphorus and potassium fertilizer. At the same time, under different nitrogen, phosphorus and potassium levels, the response of crops to trace elements is also different.
Micro-fertilizer is a chemical product that has been used as a fertilizer in agriculture after a large number of scientific experiments and studies have been confirmed to have certain biological significance, which are indispensable for the normal growth and development of plants.
There are two methods for applying trace element fertilizers: soil application and foliar application. Since the application amount per unit area is small, it must be diluted with a large amount of inert material before application, and uneven application may poison some crops. Trace element fertilizers are often mixed into a constant fertilizer for application.
1. The crop requires a small amount of trace elements, and the range from moderate to excessive is very narrow, so it is necessary to prevent excessive use of micro-fertilizer. The soil must be applied evenly when applied, and the concentration should be ensured. Otherwise, it will cause plant poisoning, pollute the soil and the environment, and even enter the food chain, which will hinder the health of humans and animals.
2, the lack of trace elements, often not because of the low content of trace elements in the soil, but its low effectiveness, by adjusting soil conditions, such as soil pH, redox, soil texture, organic matter content, soil water content, etc., can be effective Improve soil micronutrient nutrient conditions.
3. Trace elements and nutrients such as nitrogen, phosphorus and potassium are equally important and irreplaceable. Only when the requirements of plants for a large number of elements are met, the application of trace element fertilizers can fully exert the fertilizer effect, in order to show significant increase in yield. effect.
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