2-3 years (depending on the type and storage conditions)
The shelf life of insecticides is affected by factors such as product type, ingredients and storage conditions. It is usually 2-3 years, but there are large differences between different categories. The following is a comprehensive analysis:
1. Shelf life range of common insecticides
**Chemical synthetic insecticides
Pyrethroids (such as Liling insecticide): half-life 3-7 days, but the shelf life in the original unopened package is usually 24-48 months.
Organophosphorus: half-life 14-30 days, shelf life of the original package is about 2 years, and it expires faster in high temperature environment.
Imidacloprid: The shelf life is clearly 24 months, and it needs to be stored away from light and moisture.
**Botanical insecticides
Such as cinnamaldehyde: The effective period is 2-3 years, but it is easily shortened by humidity and light.
Other plant extracts: half-life is only 1-3 days, but the shelf life of the original package can reach 2 years.
2. Key factors affecting the validity period
**Storage conditions
Dry away from light: Most insecticides need to be stored in a cool and ventilated place. Direct sunlight or moisture will accelerate decomposition.
Temperature control: The half-life of organophosphorus at 30°C is 67% shorter than that at 10°C.
**Difference in dosage form
Powders and granules are easy to absorb moisture and agglomerate, and may expire prematurely.
Liquid preparations (such as sprays) should be used as soon as possible after opening, and the residual ground activity is usually only a few hours to a few days.
3. Usage suggestions
Check the packaging label: Refer to the expiration date of the product manual first (such as the 48-month mark on Liling insecticide).
Expiration treatment: It may be toxic after expiration and cannot be used anymore.
Safety protection: Ventilation and cleaning are required after spraying to reduce residual contact.
