3.25.97 | herbsurvey.html
Survey of Major Herbicides of Iowa
The following information was derived from a survey on herbicide use conducted by one
Iowa's premier Weed Management Extension Specialist, Bob Hartzler. The results of this
survey have served as a guide as to what herbicides and herbicide families are presented
in this part of the Agronomy 317LD course.
[key: % acres treated]
Iowa Corn Fields
Rank 1: Triazines 89%
--->atrazine (67.2%)
--->cyanazine (18.6%)
--->metribuzin (2.2%)
--->simazine (1%)
Rank 2:
Chloracetamides 64.9%
--->acetochlor (26.5%)
--->alachlor (2.2%)
--->metolachlor (35.7%)
--->propachlor (0.5%)
Rank 3:
Aromatic carboxylic acids 49.6%
--->dicamba (35.7%)
--->2,4-D (13.9%)
Rank 4:
ALSase inhibitors 22.2%
--->halosulfuron (1.9%)
--->nicosulfuron (15.8%)
--->primisulfuron (4.5%)
--->prosulfuron (?%)
Rank 5:
Bromoxynil 14.8%
Rank 6:
Bentazon 6.2%
Rank 7:
Glyphosate 2.6%
Iowa Soybean Fields
Rank 1:
ALSase Inhibitors 109%
--->chlorimuron (10.4%)
--->imazaquin (4.4%)
--->imazethapyr (76%)
--->thifensulfuron (18.6%)
Rank 2:
ACCase inhibitors 60.4%
--->clethodim (11.5%)
--->fenoxaprop (15.9%)
--->fluazifop (17.5%)
--->quizalofop (6%)
--->sethoxydim (9.5%)
Rank 3:
Dinitroanilines 59.9%
--->ethalfluralin (1.7%)
--->pendimethalin (27.9%)
--->trifluralin (30.3%)
Rank 4:
Glyphosate 19.9%
Rank 5:
Aromatic carboxylic acids 13.9%
--->2,4-D (13.4%)
--->2,4-DB (0.5%)
Rank 6:
Bentazon 10.3%
Rank 7 (tie):
Chloracetamides 5.6%
--->alachlor (1.1%)
--->metolachlor (1%)
Diphenyl ethers 5.6%
--->acifluorfen (2.3%)
--->fomesafen (1.9%)
--->lactofen (1.4%)
Rank 9:
Clomazone 3.4%
Rank 10:
Metribuzin 2.2%
