After me about 6-year-old agent was sent (the packaging you could see the age) I asked the Bayer Customer Service for durability. The package includes only the production date! Lt. Bayer has assumed an efficiency of up to 5 years. So check, otherwise exchange. Efficacy against cydalima perspectalis is good. The pests turn black after 2 days and die off. For me 1A :-)
