Monthly Archives: March 2017

Cotton Efficiency Survey

Professor Jeff Dorfman has helped develop a cotton survey from a research project funded by the Georgia Cotton Commission designed to help Georgia cotton farmers improve their production efficiency. Producer involvement in this research project only involves filling out a questionnaire on various cotton inputs, farm qualities, and personal experience.

You can find the survey at http://www.georgiacottonfarmers.com/.

Leave a comment

Filed under Cotton

Sprayer Clean Out

Thanks to UGA Extension Weed Scientist Dr. Eric Prostko for this update on sprayer cleanout. There is obvious concern about sprayer cleanout after application of Enlist Duo, Engenia, Fexapan, and Xtendimax. Dr. Prostko encourages all applicators to read and follow the specific sprayer clean-out instructions listed on the herbicide labels. Here are some useful links: 

2017 Enlist Duo Product Use Guide (automatic download of document – sprayer clean-out procedures listed on pages 20-21)

http://www.enlist.com/~/media/enlist/enlist-ahead/resource-pdfs/2017_enlistallcrops_pug_final.ashx

Engenia Clean-Out Recomendations:
http://agproducts.basf.us/campaigns/engenia/assets/pdf/Engenia-Spray-System-Cleanout-TIB.pdf

Fexapan Sprayer Cleanout

http://www.dupont.com/products-and-services/crop-protection/soybean-protection/articles/sprayer-cleanout.html

Xtendimax Cleanout (video presentation)
https://youtu.be/LzywJ-YSta4?list=PLWKeHPsbiIP7URV05Y03YTMfYxGLmQ3sF

I called a few local chemical dealers and the following are some commercial tank-cleaners that are currently being sold in Georgia (listed in no particular order):


1) WipeOut XS

https://s3-us-west-1.amazonaws.com/www.agrian.com/pdfs/WipeOut_XS_Label.pdf

2) Valent Tank Cleaner

https://www.valent.com/Data/Labels/1714-B-ValentTankCleaner.pdf

3) Nutra-Sol Tank-Cleaner

http://www.cdms.net/ldat/ldDC2000.pdf

4) All Clear

https://s3-us-west-1.amazonaws.com/www.agrian.com/pdfs/All_Clear_Label4.pdf

5) ProTank Cleaner

http://www.winfield.com/cs/groups/lolweb/@winfield/documents/web_content/ndjf/mzax/~edisp/36142_301402.pdf

6) Neutralize

http://www.cdms.net/ldat/ldDC1000.pdf

Leave a comment

Filed under Cotton, Soybeans, Weed Science

Pecan Budbreak & Cold Weather

It’s been about two weeks since we observes some budbreak in young pecan trees. We had a day of rain across much of the county this week, and it then dropped to 31 degrees Thursday morning. The picture above is an orchard with frost on the ground. What will happen to our trees now? UGA Extension Horticulturalist Dr. Lenny Wells has this to say:

Those areas with forecasts for 30 degrees or more should be ok. Other areas (North GA) that reach temperatures of 28 degrees or less could see damage to any foliage that may already be out. Fortunately, there is very little of this. I have seen and heard of a little sporadic budbreak here and there—mostly on newly planted or very young trees. Those on which the outer scale has split – and you only see a little green peeking through or the buds are just swollen – should be ok. But, any new growth that has started to lengthen and expand will be most susceptible if temperatures stay at 28 degrees or less for a few hours.

Most mature trees still have buds closed or are barely showing some green (most of this is deep into south Georgia). Those trees on which the buds are still closed should be fine. The level of damage a tree receives in this type of situation is completely dependent upon its level of dormancy.

March 3rd, 2017 – Photo by Mat Thompson

Developing foliage exposed to 28 degrees or less for several hours (usually 3 hours or more) will be burnt off by the freeze. The trees will bud out again, but that will probably wipe out any crop on a mature tree for the year. Since there are not many trees out this far yet, we should be ok. Even those on which we see budbreak only have a small percentage of the shoots breaking bud, so this will help.

The biggest danger will come in the form of cold injury, mostly to younger trees. This damage is usually expressed as longitudinal bark splitting, separation of bark from wood, and sunken areas on trunks, browning of the cambium (the normally bright green tissue normally observed just under the surface of the bark when scraping with a pocket knife), and sparse canopy development. Much of this may not be readily obvious until temperatures heat up in May/June and the water demand increases. The freezing temperatures destroy the cambium cells and the tree then can’t get the water and nutrients it needs. Sometimes the trees may have enough healthy tissue to keep it going for a year or more before it collapses. The more dormant the tree is, the less susceptible it will be. If the sap is rising, there is a risk for cold injury. Trees in low elevation areas will be most susceptible. Any damaged trees will then become more attractive and susceptible to ambrosia beetles, so be vigilant for these as well.

Young Elliot – Photo by Mat Thompson

Leave a comment

Filed under Pecans, Weather

UGA Cotton Market Update

Leave a comment

Filed under Cotton, Weed Science

Forage Update

Bermuda pasture in late February

Except for this week, pastures are beginning to show some green. With February’s soil temperature high and air conditioning running in the trucks and tractors, everyone wants to get busy doing something. But, doing some things now may not be economical. UGA Extension Forage Agronomist Dr. Dennis Hancock has some answers to the most common questions as of right now:

I’m out of hay. Should I start grazing my permanent pastures now? Care needs to be taken to avoid turning out too early. Grazing fescue before it has at least a good amount of growth (8”) will cost you 25-50% or more of your spring yield potential. Hammering bermudagrass just as it is waking up will also cost you 20-40%+ of its yield potential. Given the duration of last year’s drought and the mild winter, my guess is that we will be on the higher end of that range. At a certain level, feeding hay now (if you can find it… I KNOW) may save grazing days/stocking rate later or even feeding a lot more hay later (especially if the dry spring that is forecast comes true). Just preaching caution.

[More info on this and some of the subjects below are included in “Late Winter Considerations.” This file was a handout from a meeting last week in the “Grazing for Profit” conference in TN. It was prepared by Dr. Jim Green, retired Extension Forage Specialist from NC State Univ. ]

Should I plant ryegrass to try to get some grass? It is very unlikely to be economical. If one counts what they have in it and considers they are probably won’t even get 1 ton/acre out of it (likely to get less than 0.5 tons/acre). More details in the attached article from Jim Green.

Should I fertilize bermudagrass now? It is still VERY early. Bermudagrass’s response to N right now is likely to be less than 10-15 lbs of DM/acre per lb of N applied, which is below or barely breakeven from an economics perspective.  Plus, too much N now could induce more rapid dormancy break and make the plant less hardy if we get a late freeze. Does anybody remember the 2007 Easter freeze? We lost significant acreage of bermudagrass stands due to putting out N too early, and getting 2-3 nights in mid-April below 20 F. This weather then was very similar to this year.

Should I plant pearl millet now? No. Soil temps at a 2” depth have to be above 65 F and stay above 65 F. Yes, soil temps hit 65 F at 2” in some areas this week. BUT, about 6 weeks ago in January they hit that same threshold in Tifton, too! It was crazy risky to plant pearl millet then and it is risky to plant it now. Keep in mind, pearl millet seeds monitor the weather AND the calendar (or, as they know it, daylength). Don’t plant before there are 12 hrs and 20 minutes of day length (Mar. 25). April 1st is a good rule of thumb for earliest plantings. By the way, this applies to sorghum x sudan and sudangrass, too.

What Can I Do? Scout and spray for weeds or stick a soil probe in the ground. After the drought and this wacky winter weather, weeds are gonna eat our lunch this spring if we aren’t careful. A LOT of hay was imported this winter. I’m not saying that hay was completely full of weed seeds, but one can only imagine the problems that were brought in via those bales. Plus, good soil fertility this spring will be crucial to getting the pastures and hayfields off to a good competitive start.

Leave a comment

Filed under Forages