Description
Courier 40ec
**Chlorpyrifos (20% EC) – Organophosphate Insecticide**
**IRAC Group:** 1B (AChE inhibitor)
**Mode:**
– Irreversible AChE blockade → synaptic overstimulation → death
**Target Pests:**
– **Soil:** Termites, grubs, cutworms (2L/ha drench)
– **Foliar:** Bollworms, aphids, miners (2mL/L spray)
**Residual:**
– Soil: 60-120 days (Koc=6070)
– Foliar: 7-10 days (PHI: 21 days)
**Regulatory Status:**
– **Banned** in EU/US (2021-2023)
– **Restricted Use** in India (2023 Gazette)
**Resistance Data:**
– RR confirmed in *Plutella* (Asia), *Bemisia* (ME)
**Toxicity:**
– Avian LC50: 32 ppm (high risk)
– Aquatic EC50: 0.1 ppb (Category A ban)
**Alternatives:** **Chlorantraniliprole** (soil) / **Flupyradifurone** (foliar)
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