The purchase of pesticides should comply with the principles of symptomatic, effective, safe, and economical, and select counterpart pesticides for the control subjects. Generally pay attention to the following aspects:
(1) Note the applicability. There are many types of pesticides, including pesticides, bactericides, herbicides, rodenticides, etc. Each category also has its own unique efficacy and specificity. Therefore, it is necessary to select the right medicine for the control subjects and meet the suitability of pesticides in order to ensure the control effect.
(2) Pay attention to efficacy and quality. To choose efficient, high quality, low toxicity, low cost varieties.
(3) pay attention to dosage form. Pesticide formulations consist of three parts: the active ingredient content, the name of the original drug, and the processing agent type. Such as "15% triadimefon WP", wherein "15%" is the content of the active ingredient; "WP" is a processed dosage form, according to the need to select the appropriate dosage form.
(4) Attention to specificity. For pests with strong drug resistance, select pesticides that have a combination of stomach poisoning, fumigation, contact killing, internal absorption, ovicidal killing, killing, and insect killing, and which can reduce pest resistance.