Here are the seven day ratings (TABLE 1) for the Cotton Harvest Aid Trial that was established on the Claude Otahal Farm on June 26, 2012. The cotton variety is FM 835 LLB2 and was treated at 20% open
boll with a mean plant height of 21 inches.. The spray application was
made between 11 am and 11:30 am with a spray volume of 11 gal per acre @ 32
psi with Turbo TeeJet 11002 spray tips.The harvest aid application was
made with a Spider Sprayer by Gary Schwarzlose of Bayer CropScience. Ratings were made by Dr. Dan Fromme, Extension Agronomist and myself.
Table 1. Comparison of treatment rates and estimated cost
per acre, 7 days after treatment, Otahal
Farm, Nueces County, 2012.
Trt No.
|
Treatment
|
Product Rate
per acre
|
Estimated Cost1
|
Defoliation (%)
|
Desiccation (%)
|
Green Leaf (%)
|
1
|
Thidiazuron
Non-ionic surfactant (NIS)
|
1.6 fl oz
0.25 % v/v
|
$1.82
|
30
|
0
|
70
|
2
|
Thidiazuron
NIS
|
3.2 fl oz
0.25 % v/v
|
$3.59
|
40
|
0
|
60
|
3
|
Thidiazuron
Def
NIS
|
1.6 fl oz
4.0 fl oz
0.25 % v/v
|
$3.66
|
70
|
5
|
25
|
4
|
Thidiazuron
Def
NIS
|
1.6 fl oz
8.0 fl oz
0.25 % v/v
|
$5.50
|
80
|
5
|
15
|
5
|
Ginstar
NIS
|
3.0 fl oz
0.25 % v/v
|
$5.44
|
30
|
0
|
70
|
6
|
Ginstar
Crop oil concenrate (COC)
|
3.0 fl oz
1.0 % v/v
|
$5.50
|
87
|
3
|
10
|
7
|
Ginstar
Ethephon
NIS
|
3.0 fl oz
24.0 fl oz
0.25 % v/v
|
$10.72
|
70
|
3
|
27
|
8
|
Thidiazuron
Ginstar
NIS
|
1.6 fl oz
2.0 fl oz
0.25 % v/v
|
$5.42
|
30
|
1
|
69
|
9
|
Thidiazuron
Ginstar
Ethephon
NIS
|
1.6 fl oz
0.8 fl oz
24.0 fl oz
0.25 % v/v
|
$8.54
|
70
|
10
|
20
|
10
|
Aim
Ethephon
COC
|
1.0 fl oz
24.0 fl oz
1.0 % v/v
|
$7.05
|
19
|
1
|
80
|
11
|
ET
Ethephon
COC
|
1.5 fl oz
24.0 fl oz
1.0 % v/v
|
$9.42
|
14
|
1
|
85
|
12
|
Gramoxone Inteon
NIS
|
8.0 fl oz
0.25 % v/v
|
$2.04
|
39
|
1
|
60
|
1Estimated
cost is for educational purposes only and prices listed are not actual “carry
out” prices.
