Today, when fighting pests, all methods and means are good. Insecticidal preparations deserve special attention.
This kind of chemicals are designed to directly protect plants from insect pests. As a result of their use, both larvae and oviposition of parasites are also destroyed. Separate drugs are intended to combat human parasites: nematodes and mites.
There are a huge number of insecticides that differ in their properties, methods of penetration into the body of the parasite. So, contact, intestinal and systemic drugs are isolated.
Contact insecticides kill insects by direct contact with the chemical. They are able to protect plants only in that part of it where it is applied. The rest of the site, left untreated, is attacked by pests. The main disadvantage of this type of preparations is the decrease in the effectiveness of plant protection after precipitation.
Insecticideintestinal type, getting into the body of parasites, leads to their death. This substance enters the body of the insect while it is eating the treated plant. Within a few hours, the pests die.
Systemic insecticidal preparations, penetrating into the vascular system of plants, infect pests during feeding. This type of chemicals is rightfully considered 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 insecticidal preparations are divided into groups depending on the nature of their impact, most of them simultaneously affect insects in several ways. In addition, there are tools that can immediately destroy several different types of pests. Such chemicals have been called "solid-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 number of ingredients included in the composition, simple and complex preparations are also distinguished.
Natural insecticides are a separate group. They got their name due to the fact that in their manufacture mainly natural ingredients are used. For example, many gardeners note the effectiveness of the use of celandine infusion. On thea bucket of solution requires several whole plants, which are finely crushed and infused for 2-3 days. The resulting concentrate is used to lubricate shoots and leaves of agricultural crops damaged by caterpillars and aphids.
The main benefit of using natural insecticides is safety for humans. But, like all drugs, they also have their drawbacks. So, for one procedure, a large volume of solution is required, which is quite expensive with frequent treatments.
