Pesticides are critical inputs in agricultural production, and their scientific selection and rational use are essential for ensuring crop yields, agricultural product quality and safety, and environmental protection. Below is detailed guidance on pesticide selection and application.

I. Scientific Selection of Pesticides

(1) Identify the Target Pest and Needs

Before purchasing pesticides, accurately identify the type of disease, pest, or weed affecting the crops. For example:

For rice blast, choose fungicides like tricyclazole or isoprothiolane.

For aphids, select insecticides such as imidacloprid or acetamiprid.

For weeds, choose herbicides based on weed type (e.g., quizalofop-ethyl for grassy weeds, fluoroglycofen for broadleaf weeds).

For sensitive growth stages (e.g., vegetable seedlings), opt for low-toxicity, low-residue pesticides.

(2) Check Pesticide Labels and Certifications

Pesticide Registration No.: Legitimate pesticides must have a registration number issued by the Ministry of Agriculture and Rural Affairs (verifiable via the China Pesticide Information Network). Avoid unregistered or counterfeit products.

Production License No.: Ensures the manufacturer is authorized to produce the pesticide. Check its validity.

Product Standard No.: Indicates compliance with national or industry quality standards.

Label Integrity: Labels must clearly state:

Pesticide name, active ingredient(s), and concentration.

Formulation type, usage scope, dosage, and application method.

Toxicity level, precautions, production date, batch number, and expiry date.

Manufacturer contact details.

Avoid products with unclear or missing label information.

(3) Purchase from Reliable Sources

Buy only from licensed pesticide retailers or reputable e-commerce platforms. Avoid unverified vendors to prevent counterfeit products. Keep purchase receipts for consumer protection.

(4) Prioritize Eco-Friendly Pesticides

Choose high-efficiency, low-toxicity, low-residue, and environmentally friendly pesticides, such as:

Biopesticides: Bacillus thuringiensis (Bt), Beauveria bassiana (safe for humans/animals).

New chemical pesticides: Chlorantraniliprole (effective, long-lasting, low-toxicity).

Minimize highly toxic or persistent pesticides to reduce residues and ecological harm.

II. Rational Use of Pesticides

(1) Accurate Calculation and Preparation

Follow label instructions for dosage based on pest severity and crop area.

Use the "two-step dilution method":

Dilute pesticide in a small container to form a stock solution.

Mix the stock solution into the full volume of water for uniform concentration.

Prevents overdosing (phytotoxicity) or underdosing (reduced efficacy).

(2) Optimal Application Timing and Methods

Timing: Avoid high temperatures, strong sunlight, wind, or rain. Apply before 9 AM or after 4 PM for better adhesion and efficacy. Target key pest stages (e.g., egg hatching, early disease onset).

Methods: Match application to pesticide type and crop needs:

Dusts: Dusting.

Emulsifiable concentrates/Wettable powders: Spraying (ensure even coverage).

Granules: Broadcasting.

Systemic pesticides: Seed treatment, root drenching.

(3) Safety Precautions

Wear protective gear (coveralls, masks, gloves, goggles).

No smoking/eating during application.

Wash exposed skin with soap post-application; change clothes.

In case of poisoning, seek immediate medical help.

(4) Preventing Phytotoxicity and Resistance

Avoid crop damage:

Follow label instructions strictly; avoid overdosing.

Test new pesticides/mixes on small areas first.

Note crop sensitivities (e.g., melons are prone to certain pesticides).

Delay resistance:

Rotate pesticides with different modes of action (e.g., organophosphates, pyrethroids, carbamates).

Use rational combinations (avoid antagonistic interactions).

(5) Safe Disposal of Pesticide Waste

Collect used pesticide containers (bottles, bags) in designated recycling points.

Never discard randomly to prevent soil/water contamination.

By adhering to these guidelines, farmers can maximize pesticide efficacy while minimizing risks to health and the environment.