Some notes when mixing pesticides

(Baonghean) -Combining pesticides is mixing two or more types of pesticides in a sprayer to spray at the same time to kill many pests on crops; at the same time, saving on spraying costs.

Normally, mixing two types of pesticides in the same spray will be highly effective, while controlling the adverse effects of the mixing process. However, most farmers do not understand the mixing principles and arbitrarily mix pesticides, so the effectiveness of pest control is low, and it also causes poisoning to crops. To help farmers use pesticides effectively and safely for crops, we would like to share some experiences as follows:

Groups of drugs that you can mix:

- Only pesticides of different groups of roots should be combined to achieve high efficiency, such as: phosphorus group pesticides combined with the group of three-potatoes, phosphorus + chrysanthemum, three-potatoes + chrysanthemum, three-potatoes + growth regulators, microbial pesticides combined with phosphorus or chrysanthemum roots.

- Only combine drugs with different modes of action such as (contact, stomach poisoning, fumigation, systemic absorption, systemic administration,...)

- Only combine pesticides with fungicides, pesticides with herbicides, herbicides with fertilizers, ...

Groups of drugs that you should not mix:

- Do not combine fungicides with foliar fertilizers or growth regulators.

- Do not combine microbial pesticides with antibiotics-based fungicides....

- Do not combine pesticides and fungicides with copper-based drugs such as Coc 85, Coper B. Because copper-based drugs are often highly alkaline, while pesticides and fungicides are acidic. When mixed together, they will neutralize and reduce the effectiveness of the drugs.

To be sure, you should take a small amount of pure medicine and mix it with an equal amount of the other medicine in a ceramic, porcelain, glass, or plastic cup. Use a stick to gently stir until dissolved, and leave it for 2-5 minutes. Observe if there is precipitation below, scum on the surface, smoke, heat, bubbles, or unusual color changes. Do not mix these medicines together to spray on plants.

If you have confirmed that you can mix 2 types of medicine together, during the mixing process, you should put the first type of medicine into the bottle, then add water to about half of the bottle, stir well, then add the second type of medicine and continue to add water to fill the bottle with the amount of water you need. Note that before mixing the medicine, there must be a moderate amount of water in the bottle and you should not put 2 types of medicine in at the same time, the concentration of each type must be kept the same as when used separately. After mixing, spray immediately.

To avoid familiarity with pests on crops, when using, farmers need to rotate groups of drugs with different origins.

Tran Thi Hoai Phuong