Biotrophic herbicides are very harmful. What are the dangers?

Biocidal herbicides are powerful herbicides with relatively strong effects. They are mainly used to kill annual weeds. Today we will introduce to you the dangers of biocidal herbicides.

Biocidal herbicides are generally used in some chestnut-producing areas. Since chestnut orchards generally have large areas and heavy tasks on weeds, people often use biocidal herbicides to control weeds. Although this saves labor and time, it does more harm than good and leads to endless troubles. While weeding, it can also kill a large number of shrubs and seriously damage the ecological environment of plants. The annual use of biocidal herbicides will cause the fields to become dry and yellow, the root systems of weeds to be destroyed, the regeneration ability to be slow or non-regenerative, and the residual poison left behind is not conducive to the growth of crops. Especially the river embankments and roads on both sides are even more worrying. Therefore, you must be careful when using biocidal herbicides.

Biocidal herbicides are mostly used to control weeds in non-cultivated land, no-till land, tree nurseries, tea mulberries, orchards, sugar cane, etc.; they can also be used in mining areas, roads, railways, warehouses, etc. Weeding can also be used on farmland, but you need to pay attention to the following points when using it:

1. Do not abuse biocidal herbicides

Proper use of biocidal herbicides can achieve Very good control effect, but the effects of different biocidal herbicides are not perfect. For example, paraquat has a short duration of effect, and it does not completely kill most weeds with well-developed rhizomes and long growth periods, so the effect is poor; glyphosate has a relatively complete killing effect because it starts from the roots. It has a killing effect, but you must be careful when applying it, otherwise it will cause serious losses. At the same time, the abuse of herbicides can easily induce weed resistance. At present, the resistance of some weeds to paraquat and glyphosate has become quite prominent. Therefore, when weeding in different fields, you can choose herbicides with different mechanisms of action as much as possible, and do not rely too much on biocidal herbicides.

2. Choose the variety of biocidal herbicides rationally

It is necessary to more accurately distinguish the applications of different varieties of biocidal herbicides based on their basic characteristics. Paraquat and paraquat are biocidal conductive stem and leaf herbicides. They can only control the upper green parts and have almost no killing effect on the roots. However, their herbicidal effect is very fast; glyphosate and dipropyl phosphonate It is a dredge-type biocidal herbicide. It not only affects the upper green parts, but also causes damage to the roots through conduction in the crop. It is very effective on perennial weeds and is more widely used. However, this type of herbicide The effect will be slower.

3. The application range of biocidal herbicides can be broadened according to their selectivity.

Although it is a biocidal herbicide, if used appropriately, it can Selective issues can arise. When used on crops, the growth of crops and weeds can be separated in time. You can choose to apply pesticides before sowing or before emergence; you can also apply pesticides in the lower part of the crops according to the position difference, as long as the green color of the crops is not sprayed. The crops can be well protected by spraying only one part. If the rows are relatively wide, you can choose to spray between the rows. As long as the crops are not sprayed, it can be effectively killed. However, such use requires you to fully understand the growth of weeds and crops in order to use biocidal herbicides appropriately and rationally.

Four. Pay attention to avoid the occurrence of phytotoxicity

Be fully aware of the hazards of biocidal herbicides to avoid phytotoxicity. When using them, be sure to avoid spraying or drifting into them. On crops, it is forbidden to use biocidal herbicides on windy days; do not use the sprayer after use to spray other pesticides. If you really need to use it, you must wash it 3-5 times with detergent. Even if it is cleaned, it cannot be used in the seedbed stage. This sprayer sprays seedlings.