Search PMN  


Table 2 from:


Sellers, B. A., Smeda, R. J., Johnson, W. G. 2003. Atrazine may overcome the time-of-day effect on Liberty efficacy. Online. Crop Management doi:10.1094/CM-2003-1111-01-RS.


Table 2. Total weed biomass (oz/ft2) 3 WAT and at the end of the growing season prior to harvest at Columbia and Novelty, MO in 2000, 2001 and 2002.*

Treatment Rate
(lb/acre)		 Time
(HBS)		 Columbia Novelty
3 WAT Harvest** 3 WAT Harvest
2000 2001 2002 2001 2002 2000 2001 2002 2001 2002
Lib 0.31 6 10.8 11.5 14.8 166.6 790.1 31.7 44.0 2.0 43.3 11.4
Lib 0.31 2 3.3 13.9 15.9 172.2 449.0 26.9 26.5 1.9 71.2 17.6
Lib 0.31 0 7.6 16.8 396.8 70.2 1223.5 234.5 239.4 28.3 171.5 29.5
Lib 0.44 6 7.3 17.2 13.8 140.4 151.7 13.5 16.1 0 54.8 8.9
Lib 0.44 2 5.0 10.4 7.6 113.1 546.4 16.2 19.0 0 12.9 12.2
Lib 0.44 0 2.8 17.8 148.3 143.4 175.6 166.7 324.3 4.0 116.7 10.5
Lib + atra 0.25 + 0.83 6 7.1 9.8 0 0 73.7 19.7 15.8 0 24.8 9.1
Lib + atra 0.25 + 0.83 2 10.6 14.3 0 0 140.9 30.2 21.8 0 20.0 3.8
Lib + atra 0.25 + 0.83 0 3.3 6.9 0 0 193.5 236.0 150.0 2.0 153.4 2.4
Lib + atra 0.31 + 1.03 6 6.1 7.4 0 0 90.5 12.8 6.8 0 17.5 0.9
Lib + atra 0.31 + 1.03 2 3.2 17.3 0 0 52.8 23.5 11.2 0 21.2 1.6
Lib + atra 0.31 + 1.03 0 7.5 11.8 0 0 112.6 238.5 105.5 0 78.9 6.1
Lib + atra 0.31 + 0.83 6 - 12.1 0 0 119.6 - 14.2 0 16.7 2.7
Lib + atra 0.31 + 0.83 2 - 11.6 0 0 412.4 - 12.1 0 44.9 1.9
Lib + atra 0.31 + 0.83 0 - 11.9 1.6 0 71.7 - 134.7 0 90.7 3.5
Lib + atra 0.44 + 1.03 6 - 12.1 0 0 54.2 - 10.1 0 42.1 1.4
Lib + atra 0.44 + 1.03 2 - 15.1 0 0 57.4 - 12.3 0 15.6 3.1
Lib + atra 0.44 + 1.03 0 - 14.5 0 0 72.4 - 76.8 0 66.1 3.8
Untreated -- -- 87.9 398.6 915.2 1600.9 763.6 297.6 480.3 334.0 521.0 625.2
LSD (0.05)   NS NS 25.7 NS NS NS 17.1 NS NS NS

* Abbreviations: atra = atrazine; Lib = Liberty; HBS = hours before sundown; WAT = weeks after treatment.

** Biomass measurements were taken at the end of the growing season only in 2001 and 2002.




© 2003 Plant Management Network.