As we all know, commonly used insecticides and fungicides generally have a large number of aromatic solvents (benzene, toluene, xylene, etc.), and the taste is very unpleasant. The large amount of application in the agricultural field every year poses a huge threat to the atmosphere, soil and human health. In addition, due to the increased resistance of pests and diseases caused by the application of pesticides for many years, it is difficult for general drugs to achieve results. Today I will tell you about mineral oil, it has a very good bactericidal and insecticidal effect, extracted from minerals, safe and environmentally friendly, through the physical action to play a bactericidal effect.
mineral oil
Mineral oil is a mineral source pesticide refined from the specific components distilled from petroleum, which is widely used in the comprehensive control of crop diseases and insect pests because of its low toxicity, no resistance, broad spectrum of control and environmental friendliness.
History of foreign development
As early as 1865, six years after the world's first oil well was mined, unemulsified kerosene was used to control mesozoites on citrus trees. Since the 1990s, agricultural mineral oils have begun to use highly refined white oil as an active ingredient, making agricultural mineral oils food grade. Agricultural mineral oil is now used in many countries around the world on crops such as vegetables, flowers, fruit trees and cotton to control pests and mites.
Current situation of domestic development
At present, there are about 500 kinds of mineral oil pesticides registered in China, such as single preparations such as engine oil, diesel, agricultural mineral oil and mixed with chemical pesticides. Among them, there are 103 kinds of engine oil products, 416 kinds of diesel products, and 5 kinds of agricultural spray oil. (Mineral oil can be used as a pesticide alone, or it can be used as a compound with other chemical pesticides)
Efficacy of mineral oil
The function of mineral oil is very powerful, in addition to insecticidal and bactericidal effects, it can also remove pollutants such as soot and moss, and improve the efficacy of other drugs...
1. The insecticidal effect >>>
The insecticidal effect of mineral oil is mainly through its own physical properties to play the purpose of insecticidal, and there is no harm to the environment.
Isolation of suffocation: During the wetting of the leaves by the mineral oil film, the pest will also be tightly wrapped around it, so that it will be closed and suffocated, resulting in the death of the pest. At the same time, physical asphyxiation can also directly kill the eggs and prolong the effectiveness period.
Affect mating and inhibit reproduction: Mineral oil film can seal the respiratory organs of pests and the tentacles of adult insects and the young tissues of plants, affecting male and female mating, and making it difficult to find feeding sites and spawning sites, thereby reducing their pests and laying eggs.
2. The bactericidal effect >>>
Although mineral oil cannot directly kill bacteria, it can also prevent or mitigate disease through the principle of physical isolation.
Destruction of the cell wall of the pathogen: interferes with its respiration and can interfere with the pathogen's attachment to the host plant.
Control of mycelium: prevents germination and infection of spores.
3. Other insect >>>
Orange farmer's problem - the red spider. Red spiders are not insects, so many insecticides are ineffective against them, and the reproduction coefficient of red spiders is large, frequent generations, eggs, young mites, mites, and adult mites on a leaf may exist, if the control agent is different from insect eggs and kills, it is impossible to prevent red spiders.
The frequent use of pesticides has given the red spider a high degree of resistance, and many pesticides on the market have no effect on it.
Because mineral oil kills insects primarily by suffocation, red spiders do not develop resistance to vegetable oils.
4. Remove pollutants such as soot and moss>>
Mineral oil is an organic solvent, the waxy layer on the leaf surface is also an organic matter, according to the principle of similarity of the two are fused, so after mineral oil is sprayed with mineral oil, it can effectively remove pollutants such as soot, moss, dust and other pollutants on the surface, improve the gloss of leaves and fruit surfaces, and help photosynthesis.
5 Improve the efficacy of other drugs >>>
Because it is applied in conjunction with other weeding, sterilization and insecticides, it can improve the adhesion and spreading ability of the agent, so it can improve the prevention effect. If mixed with herbicides such as glufosinate, weeds will die faster and more thoroughly.
Although mineral oil is good, do not blindly apply, the application should pay attention to the following 3 points:
1. The concentration should not be too high
It is recommended to dilute to 200-300 times, after all, the concentration is too high to produce drug harm.
2. The temperature should not be too high
The use of mineral oil is strictly prohibited in high temperature environments. Oils will focus on temperature, just as a magnifying glass will focus on sunlight to burn paper, mineral oil in the case of high temperature, will easily cause drug damage, especially on citrus, it is easy to aggravate the sunburn of citrus.
3. Mixing with pesticides should be noted
Mineral oil itself has a relatively strong adhesion ability, and when compounding with pesticides, we must pay attention not to compound with some pesticides that are highly absorbent in themselves. For example, the common ether ester, because it has a strong systemicity, if coupled with mineral oil to enhance its internal absorption effect, there will be crop damage.
It is not allowed to mix with sulfur-containing compounds (stone sulfur compounds); grammydan, dithiononon, sterilized dan, fume zinc, carbendazim, copper preparations (Bordeaux liquid, copper sulfate, copper calcium sulfate), trichlorocarbicide, ceivine, dikipro, polygonaltin, triazoltin, pyrimister, 2,4-D, alkyne mite, pyroxyoxyster, propensin zinc (young fruit tender stage) and other pesticides are mixed.
Mineral oil can be used well to increase the prolonged efficacy, when it is not used well, it will aggravate the drug damage or lead to burning fruit, and it must be noted when using it, and it is best to carry out small standard experiments and promotion in a small piece of land before use, and then use it on a large scale after groping well. As long as it is applied according to the appropriate method, mineral oil can play a role in pest control, compounding and improving efficacy through physical action, and promote modern agriculture with green planting.