Why do you always use pesticides ineffective, maybe these six points are not done!
The use of pesticides is the most commonly used method to control diseases and insect pests. In the process of using pesticides, farmers often reflect that the efficacy of pesticides is not good. There are also some new "good drugs" with complete three syndromes, new ingredients, sufficient content and new dosage forms, which have been labeled "fake drugs" by farmers because of their poor efficacy. There are not a few pesticides that have been wrongly treated. Through understanding, it is found that the factors affecting the efficacy of pesticides involve many aspects.
Pesticide Self-factors Affect the Utilization of Pesticide Efficiency
The composition, physicochemical properties and dosage forms of pesticides all affect the exertion of pharmacodynamics. There will be differences between different dosage forms with the same composition and the same content. The production process and production capacity of each company will be different, and the pharmacodynamics will also be different. At the same time, it is not excluded that some companies make articles on the content and secretly reduce the content to influence the pharmacodynamics.
The diagnosis of disease is inaccurate and there is deviation in medication.
At present, the diagnosis of diseases mostly relies on the experience of dealers and farmers, because the confusion between fungal diseases and bacterial diseases occurs from time to time. When fungi and bacterial diseases occur together, many farmers blindly characterize them as fungi or bacterial diseases, and use a single agent to prevent and cure them. Thus, it is very easy to miss the best period of disease prevention and treatment, resulting in some agents not reaching the effect of "one drug with multiple effects, medicine to disease" desired by farmers, which will result in poor efficacy.
Effect of spray quality on efficacy
At present, the diagnosis of diseases mostly relies on the experience of dealers and farmers, because the confusion between fungal diseases and bacterial diseases occurs from time to time. When fungi and bacterial diseases occur together, many farmers blindly characterize them as fungi or bacterial diseases, and use a single agent to prevent and cure them. Thus, it is very easy to miss the best period of disease prevention and treatment, resulting in some agents not reaching the effect of "one drug with multiple effects, medicine to disease" desired by farmers, which will result in poor efficacy.
Effect of spray quality on efficacy
The quality of spray directly affects the level of efficacy. At present, some places use conventional spraying equipment, the droplets sprayed too large, and the fog falls on the surface of crops, which will cause bounce, and about 50% of the liquid drops on the ground, leading to the failure to fully play the efficacy. If the diameter of droplets is reduced by half, the number of droplets can be increased by 8 times and the efficacy can be greatly improved.
Many farmers are worried that the liquid can not be all on the surface of crops, so they increase water consumption, which not only can not improve the efficacy, but also reduce the efficacy. Because the drug droplets attached to the surface of crop leaves are limited, when the amount of spraying exceeds a certain limit, the fine fog droplets on the leaves will accumulate and roll down, reducing the amount of pesticides on the leaves.
In order to improve the spray quality, it is necessary to improve the existing spray equipment, reduce the diameter of the spray hole, reduce the diameter of the droplet, and maintain the distance between the sprinkler head and the crop at a distance of 20 cm or more during the spray, so as to form a good atomization effect. At the same time, when the spray is added, the silicone spray assistants are "transparent", which can reduce the surface tension of the liquid, reduce the loss caused by the springing of the liquid, and make the waxy layer thicker. The performance of material use is particularly prominent.
Drug application, treatment and Prevention
For the prevention and control of crop diseases, the common practice of many farmers is to "apply medicine to see the disease, pay more attention to the control than to prevent it". Some farmers said that in order to cure epidemic diseases, there are many "special effects" of the single agent of allyl morpholine, metalaxyl and cyanuride, and these pesticides are used to prevent and control diseases before they occur, and the above varieties are added to each medication. This kind of "active attack" disease prevention and control method is widespread in many places.
Once the efficacy is found to be reduced, the dosage will be increased and a single drug will be used for a long time, which will inevitably lead to premature bacterial resistance, and there will be no remedy for the outbreak of the disease. We should change the existing concept of prevention and control, adhere to the principle of "prevention first, comprehensive prevention", scientifically select pesticide varieties, avoid the mixing of many preparations with the same active ingredient, and suggest that different ingredients should be used alternately and mixed with protective agents to delay the occurrence of resistance.
Misconceptions in Pesticide Mixture
At present, farmers hope that all pests and diseases will be solved by one-time medication. There are many problems in the compounding of pesticides of different types and dosage forms.
First, there is a misunderstanding in the second dilution. The correct way is to dilute several pesticides to be diluted, then pour them into the sprayer and dilute the next one in order, so as to truly play the role of the two dilution in improving the efficacy.
Secondly, the order of dosage forms in the mixing process affects the exertion of pharmacodynamics.
Thirdly, the acidity and alkalinity of the drug affect its efficacy. It is easy to neutralize acid and alkali when mixing improperly. For example, copper preparations, which account for a large proportion of bacterial diseases, are liable to discoloration and precipitation when mixed with other medicines, and the efficacy of light medicines will be weakened, while that of heavy medicines will be harmful.