What about controlling the wild radish in cotton burndown? The most effective and economical option for controlling radish and also cutleaf evening primerose is an application of 2,4-D alone of mixed with any Roundup mixture (such as Roundup + Valor) at least 30 days before planting. What if you do not want to put 2,4-D in the tank? Then consider Liberty or a combination of Roundup plus Valor which should give us 70-80% controll of pre blooming primrose, full blooming primrose or radish will be controlled about 15% better.
For wild radish, regardless of growth stage, Roundup mixtures containing Harmony Extra are effective. After radish is in full bloom, Roundup + Valor will provide 75 to 90% control. Additionally, once primrose and radish are in full bloom, good to excellent control should be achieved with Gramoxone plus Direx.
How does dicamba compare with 2,4-D in cotton burndown? This question comes up on numerous occasions. Dr. Stanley Culpepper compares the two herbicides when mixed with Roundup in terms of control of horseweed, primrose, radish, cost and plantback flexbility.
What is the plantback on Valor on cotton?
According to the cotton weed control section of the 2020 UGA Pest Control Handbook… A Georgia 24c Valor label allows reduced plant-back intervals. Outflank, Panther, and Rowel have been tested and perform similarly to Valor but do not have the following use patterns:
In strip-till cotton where the strip till rig (including ripper shank) is run after application and before planting, Valor plant-back intervals are as follows:
1) > 30% ground cover = 7 days
2) 10-30% ground cover = 14 days and 0.5 inch rain/irrigation
3) <10% ground cover or tillage = 21 days plus 1” rain/irrigation
In no-tillage production or when the strip is implemented prior to application. Valor plant-back interval should be 28 days.
Additionally, 0.5” (>10% ground cover) or 1” (<10% ground cover) rainfall/irrigation is needed. If Reflex (or generic) will be applied PRE, suggest adding an additional 7 days to planting intervals.
How early can I spread my chicken litter on my cotton ground? The best time to apply poultry litter or any base nutrient is close to when the cotton plant needs it or 2 to 3 weeks before planting.
How about P and K fertilization in Peanut?
