Objective:          

Compare Talinor to competitive products for crop tolerance and weed control.

Materials and Methods:

The previous crop was a forage mix of barley, oat and peas.  The field was fertilized with 9-30-70 on September 21 and Colter winter wheat was planted on September 27, 2016 (Table 1).   A supplemental fertilizer application of 75-0-40 was broadcast to the winter wheat crop on May 1, 2017.  Herbicide treatments were applied on May 5, 2017 using a CO2 backpack sprayer equipped with TeeJet XR11002 nozzles in a volume of 20 GPA.  Crop height averaged 10 inches and plants had a minimum of one tiller.  Weeds present at application consisted of pennycress (THLAR), tumble mustard (SSYAL) and prickly lettuce (LACSE) and were five inches in height.  

Results:

All treatments afforded excellent crop tolerance (Table 2).   Similarly, all treatments provided excellent control of pennycress and tumble mustard, except for Widematch which failed to control pennycress.  Few treatments provided acceptable control of prickly lettuce (Table 3).  Talinor applied at 16 and 18.2 oz/A provided at least 90% control as did the combination of Affinity tankmix plus Widematch.  

Overall, there was a linear relationship between winter wheat yield and weed biomass (Figure 1).  All herbicide treatments reduced weed biomass relative to the check, but among the herbicide treatments, Widematch resulted in the greatest weed biomass. Although wheat yields were affected by the level of weed control, drought and high temperature conditions also suppressed yields, which were about one-third of normal. Wheat yields averaged 36 bu/A in this study.  Grain protein averaged about 11% in the study and was unaffected by herbicide treatment.  Test weights were low, averaging about 57 lb/bu.  Interestingly, the highest test weights was observed with Widematch. 

Summary:

Talinor treatments afforded the most complete weed control and weed control did improve as the rate of Talinor increased. 

 

Table 1. Materials and Methods.
Seeding Date: 9/27/2016 Harvest Date: 8/7/2017
Julian Date: 271 Julian Date: 219
Seeding Rate: 125 lb/A Soil Type: Creston SiL
Previous Crop: forage mix Soil Test: 70-44-113
Tillage: Conventional Fertilizer: 9-30-70, 75-0-40

 

Table 2. Effect of Talinor on Weed Control in Winter Wheat       

 

Treatment

 

Rate 

 5/12 5/20 5/26 5/20 5/26 6/9 8/3 5/20 5/26 6/9 8/3
CI CI CI THLAR THLAR THLAR THLAR SSYAL SSYAL SSYAL SSYAL
% % % % % % % % % % %
Check   0 0 0 0 0 0 0 0 0 0 0
CoAct 2.75 fl oz/a 3   0   0   96   98   98   100   97   98   98   98  
Talinor 13.7 fl oz/a
Herbimax 1 % v/v
CoAct 3.2 fl oz/a 3   0   0   98   98   98   100   98   98   98   100  
Talinor 16 fl oz/a
Herbimax 1 % v/v
CoAct 3.6 fl oz/a 2   2   0   97   98   98   100   98   98   98   100  
Talinor 18.2 fl oz/a
Herbimax 1 % v/v
Huskie 2.07 EC 11 fl oz/a 3  0  0  97  98  98  100  98  98  98  100 
Activator 90 0.25 % v/v
Widematch 1.5EC 16 fl oz/a 2 0 0 57 35 15 0 66 98 97 99
Affinity Tankmix 50 SG 0.6 oz/a 3   0   0   80   92   95   97   95   98   98   100  
Widematch 1.5EC 16 fl oz/a
Activator 90 0.25 % v/v
Affinity Tankmix 50 SG 0.6 oz/a 5  0  0  82  90  95  100  98  98  98  100 
MCPA Ester 3.7 EC 12 fl oz/a
Orion 17 fl oz/a 0 0 0 84 86 95 100 98 98 98 100
Mean   2 0 0 77 77 77 77 83 87 87 89
LSD P=.05   5.802 1.666 . 14.749 6.886 4.169 3.331 11.915 0.333 0.999 1.053
CV   143.66 519.62 0 11.11 5.15 3.13 2.49 8.29 0.22 0.66 0.69
Treatment Prob(F)   0.6612 0.4726 1 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001
CI: Crop injury, THLAR: Pennycress, SSYAL: Tumble mustard.             

 

Table 3. Effect of Talinor on Weed Control in Winter Wheat           
  Treatment     Rate  5/20 5/26 6/9 8/3 7/3 7/3 8/7 8/7 8/7
LACSE LACSE LACSE LACSE Weeds Wheat YLD PRO TWT
% % % % lb/A lb/A bu/A % lb/bu
Check   0 0 0 0 3005 4850 14 11.00 57.6
CoAct 2.75 fl oz/a 91   88   91   72   201   8658   38   11.38   56.4  
Talinor 13.7 fl oz/a
Herbimax 1 % v/v
CoAct 3.2 fl oz/a 96   94   96   90   98   9768   42   11.12   57.6  
Talinor 16 fl oz/a
Herbimax 1 % v/v
CoAct 3.6 fl oz/a 96   95   95   92   181   7692   43   11.11   57.6  
Talinor 18.2 fl oz/a
Herbimax 1 % v/v
Huskie 2.07 EC 11 fl oz/a 96  89  93  83  551  6506  41  11.16  56.8 
Activator 90 0.25 % v/v
Widematch 1.5EC 16 fl oz/a 83 93 95 78 1767 5930 29 10.87 58.9
Affinity Tankmix 50 SG 0.6 oz/a 85   94   98   94   653   6431   36   11.21   57.8  
Widematch 1.5EC 16 fl oz/a
Activator 90 0.25 % v/v
Affinity Tankmix 50 SG 0.6 oz/a 89  91  92  63  592  6594  37  11.15  56.9 
MCPA Ester 3.7 EC 12 fl oz/a
Orion 17 fl oz/a 86 89 91 55 796 6233 40 11.11 57.0
Mean   80 81 83 70 872 6962 36 11.12 57.4
LSD P=.05   8 9.485 6.826 23.035 840 2620 10.32 0.447 0.953
CV   5.75 6.73 4.73 19.11 55.7 21.74 16.78 2.32 0.95
Treatment Prob(F)   0.0001 0.0001 0.0001 0.0001 0.0001 0.0316 0.0005 0.5628 0.0029

LACSE: Prickley lettuce, YLD: Yield, PRO: Protein, TWT: Test weight.           

 

Figure 1. Relationship between weed biomass and yield

Graph showing the relationship between weed biomass and crop yield.