Field refDW 64REC-435Crop Protection

Grasshopper spraying: label rates and thresholds decide the economics

The Western Producer urges restraint on grasshopper sprays: scout thresholds, target nymphs with low water volumes, follow label rates and skip unneeded tank mixes.

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Agronomist’s notes

  • Spray only when grasshopper counts reach economic thresholds; sub-threshold passes waste money and yield protection is marginal
  • Young nymphs are much easier to control than adult grasshoppers, so early timed passes beat late rescue sprays
  • Use low water volumes and high pressure for canopy penetration, follow label rates and avoid unnecessary tank mixes that can cut effectiveness or raise costs

The Western Producer is urging farmers to use caution when spraying for grasshoppers, warning that hasty insecticide passes can waste money and invite trouble in a season where 'hopper pressure is drawing attention across the Prairies.

The agricultural publication's central message is restraint: treat only when counts justify it. Grasshopper control pays when populations reach economic thresholds, and spraying below those levels burns input dollars without protecting yield. Growers should scout field edges and neighbouring roadsides first, because grasshoppers typically move into crops from those areas, and concentrate egg-laying in patches that make mapping worthwhile before any sprayer rolls.

Timing matters as much as the spray decision itself. Young grasshoppers are far easier to kill than adults, so early passes against nymphs deliver better control than late rescue attempts against winged, hardened insects that can travel. Waiting too long also shrinks the yield that can still be saved.

Coverage is the other half of the equation. The publication advises low water volumes and high spray pressure to drive droplets into the crop canopy where grasshoppers feed, and cautions that coverage drives efficacy more than product choice in most cases. That puts calibration and nozzle condition ahead of brand loyalty in the planning queue.

The caution extends to the tank mix. Farmers should follow label directions on insecticide rates and avoid unnecessary tank mixes, since combinations can reduce effectiveness, raise costs or create compatibility problems. The label is the legal and agronomic baseline: rates, buffers and re-entry rules exist for reasons that matter both in court and in the field.

Beyond agronomy, the warning carries a regulatory and ecological edge. Indiscriminate spraying threatens pollinators and other beneficial insects, and regulators watch how the industry handles exactly these decisions. Misuse of insecticides risks both crop benefits and the wider environment, so restraint at the spray deck protects more than the field's budget line.

For growers weighing a pass this season, the practical sequence is straightforward: scout and count against published thresholds, map the hotspots along field margins, spray only the patches that justify it, target nymphs while they are still vulnerable, and keep water volumes, pressure and label rates inside the specs. The Western Producer's message is that the cheapest insecticide pass is the one a farmer decides not to make — and the second cheapest is the one made on counts, not on nerves.

via Google News: spraying season farm (Source)

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Staff writer covering marketplaces and e-commerce at Arable Wire.

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