Dan Anco Comments Clemson June 18 Peanut Notes No. 97 2021

Comparatively, our seats for the storm system coming up the gulf are closer to the back than they are to the front row. Still, receiving more rain (an inch plus) in the coming days over the weekend has potential to further delay timely field access with the ground sprayer if our ground is still drying out from previous rains. Most areas are accessible, and it is certainly good not to be in a drought.


To fly on fungicide or not to fly it on? If we are "Wet" with a capital W and behind schedule, air application can be a helpful bridge during a time of difficulty. My rough guide is if the ground sprayer would be delayed 5 days or more then an air application should be helpful. Alternatively, if the ground sprayer goes in 7 days late, I would recommend a sulfur tank mix, such as Provost Silver + Microthiol Disperss (3.75 to 5 lb/A). I understand it is extra time and material to transport and add the sulfur, but what is easier to do, forgive and relieve the land of its water-logging (outside my ability) or recommend a path we can walk as a result of it?

There is of course more flexibility ineffective product/mix options (so long as a product with systemic/curative activity is included) if a spray is only delayed a couple days or if we are in a low disease pressure zone (requires verification and scouting), but more challenging situations as we further enter the middle of the growing season call for increased strategery and a note of caution.


If we are still under fungicide coverage from the last application (less than 10 to 12 days since last app), it wouldn't hurt to consider applying our next application slightly early. This helps buffer us against a follow-up rain after the coming one should it further prevent field access.


Manganese applications for fields with deficiency standardly are applied around 60 and 75 DAP with fungicides. Many tank mixes are compatible, but when in doubt, test the combination in a jar to help avoid a messy surprise or operational down time. Similar to cutting a board, measure twice cut once.


Dan Anco

Extension Peanut Specialist and Associate Professor

Department of Plant and Environmental Sciences

Clemson University – Edisto Research and Education Center

64 Research Road

Blackville, SC 29817

630-207-4926 cell

danco@clemson.edu

Clemson Extension Peanuts