What must be used at all times when spraying?

• A. An agitator
• B. A filter
• C. A strainer
• D. A pressure gauge

Answer: (A)

Keeping the spray mixture in continuous motion is essential to ensure the pesticide stays uniformly mixed during application. An agitator provides that constant stirring, so solids stay suspended and emulsions stay dispersed as you spray. Many formulations—like wettable powders, flowables, and emulsifiable concentrates—tend to settle or separate if left unmixed, which means the actual concentration reaching the target can fluctuate. That leads to inconsistent coverage, incorrect application rates, crop damage, and reduced pest control effectiveness. Agitation also helps prevent nozzle clogging by keeping particles in suspension. While filters, strainers, and pressure gauges are important for safe and effective operation, they don’t keep the mixture properly mixed; agitation does. So, running the agitator at all times while spraying ensures a uniform, accurate application.