Baxley – March 20, 9:00 a.m. – Baxley Church of God – Fellowship Hall, 353 Blackshear Highway
Dawson – March 21, 2:00 p.m. – Main Street Theater, 152 North Main
Donalsonville – March 21, 9:00 a.m. – Lion’s Club, 100 South Wiley Avenue
Statesboro – March 19, 3:00 p.m. – Bulloch County Ag Center, 151 Langston Chapel Road
Tifton – March 20, 3:00 p.m. – Tifton Campus Conference Center – Small Auditorium, 15 RDC Road
I looked at some wheat after our production meeting yesterday and saw some powdery mildew. Randolph Ag Agent, Brock Ward, says they are seeing it also and showed me some good information on wheat growth stages. At this time, much of our wheat is nearing Feekes 6 where that first joint is beginning to show.
This is important because powdery mildew on lower leaves has little or no effect on yield, according to UGA Grain Pathologist, Dr. Alfredo Martinez. If we put a fungicide too early, the plant will not be protected during the later half of the grain-filling period. It is recommended that fungicides not be applied before flag leaf emergence unless we have a very susceptible variety. Below is a screen shot of small grain growth and development from NC State’s Small Grain Production Guide: http://www.smallgrains.ncsu.edu/production-guide.html
Filed under Disease, Grain
Here is a mayhaw orchard blooming in Thomas County. Bees are attracted to the blooms and I was able to get a close up. UGA conducted research on mayhaws at the Attapulgus Research Farm near Bainbridge many years ago and found that the trees would be well adapted to the Southeast. Lots of residents in Thomas County have mayhaw trees and I get calls about certain mayhaw issues. Pests such as insects, disease and sometimes birds/deer can cause problems.
The biggest question I receive on mayhaws concerns a disease called Cedar-Quince Rust. This fungus overwinters on cedar trees and infects mayhaws during bloom and early leaf development. The disease has to have an alternate host to complete its cycle. In some cases you may be able to remove cedar trees winthin a quarter of a mile. If many cedar trees are present, this is not practical. In this case, managing rust with a fungicide program is the best option.
UGA Extension Pathologist, Dr. Elizabeth Little, says that myclobutanil is labeled for this disease and can be applied starting at bloom if this disease has been a problem. Resistance is common with myclobutanil so the further apart your sprays the better. Below is a picture of Cedar-Quince Rust on mayhaws I took last year.
Warrant recently received both federal (January) and state (February) approvals for use on peanuts in Georgia. Here are a few thoughts from UGA Weed Scientist, Dr. Eric Prostko’s, regarding its potential use:
1) The current supplemental label only permits PRE and/or EPOST applications (before flowering).
2) Of these 2 timings, I would prefer to see EPOST applications of Warrant tank-mixed with Gramoxone + Storm + NIS.
3) At this point in time, I have NOT observed any real differences in weed control between Dual Magnum and Warrant based peanut weed control programs (Figure 1). However, there is some data that suggests that Warrant might be a better choice for non-irrigated fields.
Tomorrow, UGA Weed Scientists, Dr. Stanley Culpepper and Dr. Eric Prostko, will give us updates in cotton and peanut weed control. Pictured below is Dr. Culpepper’s 2014 pigweed program recommendations in cotton with some great information.
UGA Extension Peanut Weed Scientist, Dr. Eric Prostko, has an update on peanut herbicide injury. He will be giving us an update on peanut weed control tomorrow in Thomas County:
Frequently, peanut growers get concerned when they make herbicide applications that “burn” their crop. One of the herbicides that can cause this type of injury is Cobra (Figure 1). Recent results from tests conducted in Florida reconfirm that the injury caused by Cobra or Cobra + 2,4-DB is cosmetic in nature and does not negatively impact peanut yields (Figure 2). In these tests, Cobra or Cobra + 2,4-DB treated plots yielded 97-105% of the non-treated check plots. Cobra or Ultra Blazer + 2,4-DB is recommended for the control of Palmer amaranth in peanut fields when Cadre is not a viable option due to ALS-resistance or crop rotation concerns.
Thanks to Randolph Extension Agent, Brock Ward, for putting this post together.
Three new webcasts sponsored by Cotton Incorporated and the Plant Management Network may help you make pre-plant decisions on variety selection, weed management strategies, and nematodes. Below are the links of the free webcasts. These webcasts are of Extension Cotton Specialist from different fields of expertise from across the Southeast. Although these presentations include great information please be sure to take their advise and check with your local extension office to ensure that the topics that they cover are for our climate and growing conditions. An example would be to use your local trial data from the UGA Statewide Variety Testing program located at www.swvt.uga.edu/index.html.
- “Cotton Variety Selection” by Mike Jones, Associate Professor and Cotton Extension Specialist, takes viewers through the increasingly complex choices that growers face when choosing new varieties. While new transgenic, “value added” traits may give you growers the edge in some ways, they are not always a better choice than tried and true varieties with high yield potential. This presentation will help consultants, growers, and others in the cotton industry make informed decisions on selecting the right variety for their situation.
- “Management of Glyphosate-Resistant Italian Ryegrass”, by Mississippi State University Research and Extension Weed Scientist Jason Bond, helps practitioners learn more about the increasing occurrence of glyphosate-resistant Italian ryegrass biotypes and how to minimize their effects on cotton crops. Bond was the first to discover glyphosate-resistant Italian ryegrass in 2005, and he is among the leading experts in managing this increasingly significant issue.
- “Cotton Nematode Management in the South” by John D. Mueller, Professor of Plant Pathology and Director of the Edisto Research & Education Center at Clemson University, helps growers control this damaging class of pest that is impossible to eradicate and collectively has cost $3 billion in damages worldwide last year. This presentation will help consultants, growers, and other practitioners scout and manage the various cotton nematode species found in the Southern U.S. In particular, feeding habits, damage symptoms, and the right management tools for each nematode species are discussed.