Objective:

To evaluate the effect of Palisade when applied at different rates and timings in barley. 

Materials and Methods:

Palisade was applied at 7 oz/A to Goldeneye six row barley at the tillering (June 1) and flag leaf (June 10) growth stages either as single or sequential applications (Table 2). Treatments were applied using a CO2 backpack sprayer with Teejet XR11002 nozzles in 20 GPA of water and were replicated three times using a randomized complete block design.  

Results: 

Differences in height were observed on July 1. A single application of Palisade at flag leaf stage resulted in the greatest reduction in plant height. The height of the remaining treatments were not different from the non-treated check. Despite the initial PGR effect, height differences were no longer detectable at the August 9th assessment. Similarly, no differences were observed for lodging, yield or grain quality.

Summary:

Palisade applied at 7 oz/A at flag leaf resulted in an initial reduction in plant height.  However, this response was temporary, and treatment differences could not be detected at harvest.  

Table 1. Materials and Methods.

Seeding Date: 4/29/2016 Harvest Date: 9/1/2016
Julian Date: 120 Julian Date: 245
Seeding Rate: 80 lb/A Soil Type:  Creston SiL
Previous Crop: Canola Soil Test: 104-24-652-154
Tillage: Conventional Fertilizer: BC: 125-30-30-20, DR: 3-14-0
Herbicide: Huskie 11/oz/A + Axial 16/4 oz/A + NIS 1 qt/100 gal + UAN 28% 1 qt/A

Table 2. Effect of Palisade rate and timing on agronomic performance in barley, Kalispell, MT - 2016.

  Rate Timing Height in.
      7/1 		Height in.
      8/9 		LOD % YLD bu/A1 PP % TWT lb/bu1
Check     41.9 42.6 43.3 71.6 91.9 50.4
Palisade 7 fl oz/A Tillering 40.7 42.3 14.0 96.1 94.9 51.7
Palisade 2 fl oz/A Tillering +            
   Palisade 5 fl oz/A Flag Leaf 40.6 41.9 29.0 83.9 94.3 51.7
Palisade 5 fl oz/A Tillering +            
   Palisade 2 fl oz/A Flag Leaf 40.7 40.4 31.7 79.1 92.1 51.0
Palisade 7 fl oz/A Flag Leaf 37.5 42.8 46.7 98.8 93.2 51.1
Mean     40.3 42.0 32.9 85.9 93.3 51.2
CV     2.9 4.2 83.1 14.5 2.5 1.7
LSD     2.2 ns ns ns ns ns
Pr>F     0.0174 0.5201 0.6239 0.1209 0.4784 0.3933

LOD: lodging; YLD: yield; PP: percent plump; TWT: test weight; ns: non-significant

1 adjusted to 13% moisture.