Today, in the fight against pests, all methods and means are good. Special attention should be paid to insecticides.
This kind of chemical means are intendedfor the direct protection of plants from insect pests. As a result of their application, larvae and oviposition of parasites are also destroyed. Some drugs are designed to combat human parasites: nematodes and mites.
There is a huge amount of insecticides that differ in their properties, ways of penetrating the body of the parasite. So, isolate contact, intestinal and systemic drugs.
Contact insecticides destroyinsects when they are in direct contact with a chemical substance. They are able to protect plants only in the part where it is applied. The rest of the site, left untreated, is attacked by pests. The main disadvantage of this type of drugs is a decrease in the effectiveness of plant protection after precipitation.
Insecticidal agent of intestinal type, falling intothe body of parasites, leads to their death. This substance acts in the body of an insect while eating a processed plant. Within a few hours the pests are dying.
Systemic insecticides, penetrating intovascular system of plants, infect pests during nutrition. This type of chemical is rightfully considered to be the most effective, because they are quickly absorbed by the plant itself and, being inside, do not depend on the weather.
Despite the fact that insecticidesare divided into groups depending on the nature of the impact they exert, the majority of them simultaneously affects insects in several ways. In addition, there are tools that can immediately destroy several different types of pests. Such chemicals are called "continuous action insecticides."
There is a classification of means of combatinginsects, depending on their chemical composition. Allocate: preparations of sulfur, organic chemical compounds, plant poisons (those that contain alkaloids, mineral oils, etc.). Depending on the amount of ingredients that make up the composition, simple and complex preparations are also distinguished.
The main advantage of using insecticidesnatural origin - safety for people. But, like all drugs, they also have their shortcomings. So, for one procedure, a large volume of solution is needed, which is quite expensive for frequent treatments.
