Choose a pesticide and enter the application date to count down to the safe harvest date (PHI values for reference only).
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Pre-harvest interval (PHI) | PHI from pesticide label | GB/T 8321 |
| Dissipation half-life (DT50) | C = C0·e^(−kt); t1/2 = ln2/k | GB 2763-2021 |
| Maximum residue limit (MRL) | Residue must ≤ MRL | GB 2763-2021 |
⏰ 农药安全间隔期倒计时。农业种植工具,帮助计算种植参数与产量。