WEED RESPONSE TO BURNDOWN HERBICIDES

This table gives a general comparative rating of "burndown" herbicides used in no-till corn and/or soybean production. Under unfavorable conditions, some herbicides may not perform as well as indicated below. Under very favorable conditions, control may be better than indicated. Soil type, rate of herbicide, weed stage of growth and environmental conditions all interact to influence herbicide performance.

Weed control rating:

9 = 85 to 100%; 8 = 75 to 85%; 7 = 65 to 75%; 6 = 55 to 65% control; and NR = not recommended.

Weed control of 5 or less is rarely significant. These treatments are rated for control of existing vegetation only. The use of crop oil, surfactants or fertilizer solutions generally increases burndown activity of these herbicides. Check label for recommended rates and type of additives. For best results use the liquid form of Bladex and Atrazine.

	Grass and Broadleaf Weeds		Annual Broadleaf Weeds Only
Herbicide ***	(0-3")	(>3")	(0-3")	(>3")
2,4-D	NR	NR	9+	7	NR	NR	NR	NR	9	7	8+	8	6
Marksman **	NR	NR	9+	8	2	NR	NR	2	9	8	8+	8	6
Gramoxone Extra	9+	8	8+	8	9	3	5	3	7	3	5	5	NR
Glyphosate	9+	8	9+	8	9	4	9	6	7	6	8+	6	7
Glyphosate + 2,4-D	9+	8+	9+	9+	9	4	9	6	9	8	9	8+	8+
2,4-D + dicamba **	NR	NR	9+	8	NR	NR	NR	NR	9	8	9	8	7
Atrazine	8+	NR	9	NR	5	2	5	2	5	2	8	8	NR
Atrazine + Gramoxone Extra	9+	8	9+	8	8	6	8	6	7	4	9	6	NR
Canopy/Canopy XL	7	NR	8	NR	NR	NR	NR	NR	NR	NR	6	8	NR
Pursuit	7	NR	8	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR
Sencor/Lexone	5	NR	8	NR	NR	NR	NR	NR	NR	NR	NR	NR	NR
Dicamba	NR	NR	9+	9	NR	NR	NR	NR	9	8	7	8	7+

* 2,4-D is not effective on white (Ladino) clover.
** Use Banvel only on soil types for which the preemergence use of this product is permitted by label.
*** Check label for crop restrictions; not all herbicides mentioned above are labeled for both corn and soybeans.