Table 8-6.  Corn growth stage for application of postemergence herbicides.1
Herbicide	Application Method	Corn Growth Stage2
Accent	Overtop or drop nozzles	Anytime to 20 inches or six leaves
	Drop nozzles only	20 to 36 inches or 10 leaves
Atrazine	Overtop or drop nozzles	Up to 12 inches
Banvel	Overtop or drop nozzles	Spike to 8 inches or five leaves
	Drop nozzles only	8 to 36 inches,but not within 15 days of tassel emergence
Basagran	Overtop or drop nozzles	Corn tolerant at all stages; for better coverage, drop nozzles suggested after corn is 20 inches
Basis	Overtop	Spike through 6 inches or two leaves
Basis Gold	Overtop or drop nozzles	Anytime to 12 inches or five leaves
Beacon	Overtop or drop nozzles	4 to 20 inches
	Drop nozzles only	20 inches or six leaves up to tassel emergence
Buctril	Overtop or drop nozzles	Spike to tassel emergence; for better coverage, drop nozzles suggested after corn is 20 inches
Buctril 4EC
Celebrity	Overtop or drop nozzles	Up to 20 inches or six leaves
	Drop nozzles only	20 inches or seven leaves to 36 inches or 9 leaves
Celebrity Plus	Overtop or drop nozzles	4 to 24 inches
Clarity	Overtop or drop nozzles	Emergence to 8 inches or five leaves
	Drop nozzles only	8 inches or six leaves to 36 inches, no later than 15 days before tassel emergence
2,4-D	Overtop or drop nozzles	After leaves unfold, up to 8 inches
	Drop nozzles only	8 inches to tassel stage
Distinct	Overtop or drop nozzles	4 to 24 inches.  Drop nozzles suggested after 20 inches to improve coverage.
Evik	Drop nozzles only	Minimum 12 inches; up to 3 weeks prior to tasseling
Exceed	Overtop or drop nozzles	4 to 20 inches or six leaves
	Drop nozzles only	20 inches or seven leaves to 30 inches
Laddok	Overtop or drop nozzles	Emergence to 12 inches
Liberty3	Overtop or drop nozzles	Emergence to 24 inches or seven leaves
	Drop nozzles only	24 to 36 inches
Liberty ATZ 3	Overtop or drop nozzles	Emergence to 12 inches
Lightning4	Overtop or drop nozzles	Spike until 45 days of harvest; for better coverage, drop nozzles suggested after corn is 20 inches
Lorox	Drop nozzles only	Minimum 15 inches tall
Marksman	Overtop or drop nozzles	Emergence to 8 inches or five leaves
Permit	Overtop or drop nozzles	Spike to layby; for better coverage, drop nozzles suggested after corn is 20 inches
Pinnacle	Overtop or	One leaf to three leaves or 8 inches
	drop nozzles
Poast5	Overtop or drop nozzles	Anytime until onset of pollination; for better coverage, drop nozzles suggested after corn is 20 inches
Poast Plus5
Resource	Overtop or drop nozzles	Two to 10 leaves
Roundup Ultra6	Overtop or drop nozzles	Emergence to 30 inches or eight leaves
Tough 5EC	Overtop or drop nozzles	Corn tolerant at all stages; for better coverage, drop nozzles suggested after corn is 20 inches.
1 For tank mixes, the most restrictive growth stage usually applies.  See respective labels for details.
2 Corn height should be measured from the soil surface to the tallest free-standing leaf.  For leaf number, count only
those leaves with a collar.
3 Apply only to Liberty Link hybrids.
4 Apply only to Clearfield (imidazolinone-tolerant or imidazolinone-resistant) hybrids.
5Apply only to Poast Protected hybrids.
6Apply only to Roundup Ready hybrids.