New spray tips (A) produce a uniform distribution when properly overlapped. Worn spray tips (B) have a higher output with more spray concentrated under each tip. Damaged spray tips (C) have a very erratic output (over applying and under applying).

A major cause of improper spray application is nozzle wear. Maintenance and timely inspection helps to identify worn nozzles and extend service life.

Over-application can cause:

• Crop damage
• Chemical carry-over, affecting future crops
• Ground water contamination

Under-application may:

• Require additional field passes
• Cause inadequate weed, pest or disease control, all of which impact crop yields

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