Work out fungicide dose instantly with clear inputs, formula shown and shareable results.
Protectant fungicides are dosed per litre of spray solution, so the tank charge is simply label dose x tank capacity. Multiplying by the number of loads gives the product to buy, and the interval times the number of sprays shows how long the protective programme covers.
Tank charge
Product per tank = label dose (per L) x tank capacity (L)
Programme
Total product = per tank x tank loads; programme days = interval x sprays
Observe the label's maximum number of applications per season, the pre-harvest interval and worker re-entry period. Residue violations can make a crop unsaleable.
Alternate FRAC mode-of-action groups between sprays and never use a single-site fungicide more than two or three times in a season, or resistance builds quickly.
Only if disease pressure is low. Protectants wash off and grow out within 7-14 days; stretching the interval through a wet spell usually costs more in yield than the spray saved.