Peanuts:

Dr. Mark Abney –

“Portal (fenpyroximate) received a label and can be used in peanut for mite management in 2020. See the supplemental label below.

20 portal peanut supplemental

As a reminder, there are only two products registered and recommended by UGA for mite control in peanut: Comite and Portal.  

I recommend using 20 gallons of water per acre when targeting mites with a ground application.”

Corn:

Dr. Bob Kemerait –

“Yesterday evening John McLemore, Ag agent in Coffee Co, worked with a consultant who brought him a corn sample from Bacon County. The pictures (below) John sent to me were clearly positive for southern rust, meaning this disease is now confirmed in Decatur, Jeff Davis, and Bacon Counties (also Wayne Co at time of writing).  

Southern Corn Rust Spores, John McLemore, Bacon Co, GA, 2020

The disease is obviously just getting started as a lot of people, including many of you, have been looking but not found it.  But it is only a matter of time before it blows up.  Scouting is essential if growers want to delay fungicide applications.”

Cotton:

Dr. Phillip Roberts-

“Below is information from Dr. Stanley Culpepper that was recently posted on ugacotton.com.”

New Liberty 24 (c) state label to help Georgia cotton farmers (A. S. Culpepper). As a result of great team work with the Georgia Department of Agriculture and BASF, Georgia cotton farmers have a new Liberty label allowing shortened intervals between sequential Liberty applications which can improve weed control.

Research has shown understanding the time interval between sequential post applications is one of many critical components for an effective weed management system. The figure below compares 6 inch Palmer amaranth response to sequential Liberty applications as influenced by interval between applications. Obviously, one needs to spray Liberty when the biggest pigweed in the field is 3” for complete control and in this event a follow up application can be made when the next flush of pigweed reaches 3”. With the challenging weather during 2020, spraying all weeds at 3” or less may not be practical for some fields; thus, when pigweed is too large to kill with the first application then the second application timing is important.

DO NOT MAKE MORE THAN TWO LIBERTY APPLICATIONS in a season for resistance management purposes; follow the second Liberty application 10-12 days later with a layby directed application including conventional chemistry such as Diuron + MSMA + Crop Oil or Roundup + Diuron (add Envoke with layby if morningglory or nutsedge is an issue; check carryover)!

Few critical points from the label: 1) One must have 24 (c) label in hand when making application; 2) Liberty may be applied twice over-the-top of glufosinate-tolerant cotton as long as there is at least a 5 day interval between applications; 3) Do not include tank mix partners when making two applications less than 10 days apart. 4) Do not apply more than 36 oz/A overtop of cotton per application.

Click the following link to view the Liberty 280 SL FIFRA Sec. 24(c) Special Local Need Label:  Liberty 280 SL NVA 2020-04-594-0079 shortened seq interval 04-14-2020b_24c GA-20003

Soybeans:

Dr. Kemerait-

“On 9 June we confirmed Asian soybean rust on SOYBEANS in our sentinel plots in Mitchell County funded by the Georgia Soybean Commission.  While not unexpected, this is very important to Georgia’s soybean producers because:  1) This may be the earliest we have ever found soybean rust on commercial soybeans in Georgia, 2) the weather is absolutely perfect for rapid development and spread of the disease, and 3) While the Stripling Irrigation Research and Education Park is in southwestern Georgia, it isn’t in the very southwest corner of the state, meaning the possibility of rust on beans is somewhat advanced.”

Real time Disease Mapping:

soybean.ipmpipe.org

corn.ipmpipe.org