Today, in pest control all methods and means are good. Insecticidal preparations deserve special attention.
Chemicals of this kind are intended for the direct protection of plants from pests. As a result of their use, the larvae and ovipositors of the parasites are also destroyed. Separate drugs are intended to combat human parasites: nematodes and ticks.
There are a huge number of insecticides that differ in their properties, methods of penetration of the parasite into the body. So, contact, intestinal and systemic drugs are isolated.
Contact insecticides kill insects when they come in direct contact with a chemical. 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 drug is a decrease in the effectiveness of plant protection after rainfall.
An insecticidal agent of the intestinal type, entering the body of parasites, leads to their death. This substance enters the body of the insect while eating a treated plant. Within a few hours, the pests die.
Systemic insecticides , penetrating the vascular system of plants, affect pests during nutrition. This type of chemical is considered to be the most effective, because it is absorbed quite quickly by the plant itself and, being inside, does not depend on the weather.
Despite the fact that insecticidal preparations are divided into groups depending on the nature of the impact they exert, most of them simultaneously infect insects in several ways. In addition, there are tools that can immediately destroy several different types of pests. These chemicals are called "continuous-acting insecticides."
There is a classification of insecticides 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 included in the composition, simple and complex preparations are also distinguished.
A separate group are natural insecticides. They got their name due to the fact that mainly natural components are used in their manufacture. For example, many gardeners note the effectiveness of the use of celandine infusion. On a bucket of solution, several whole plants are needed, which are finely chopped and insisted for 2-3 days. The resulting concentrate lubricates shoots and leaves of crops damaged by the caterpillar and aphids.
The main advantage of using natural insecticides is safety for people. But, like all drugs, they also have their drawbacks. So, for one procedure, a large volume of solution is required, which is quite expensive for frequent treatments.