Current List of Counties where Southern Corn Rust has been reported
Mitchell (Stripling Plots)
I think that is our current list
Our row-crop disease situation is pretty much the same as from my last e-mail.
- Environmental conditions continue to be favorable for development of fungal diseases; we still have moisture and some afternoon storms and warm temperatures. Such will certainly favor development of white mold and leaf spot on peanuts and continued spread of southern corn rust.
- Crop development: all of our crops, and especially peanuts and cotton, are progressing to where they are increasingly vulnerable to disease. A) larger leaf canopies create greater humidity and longer leaf-wetness periods within the canopies, conducive for disease. B) Denser canopy makes getting fungicides to the “target” areas more difficult. C. At least for peanuts, growth brings on pegs and limbs along the soil which are vulnerable to attack.
HERE IS WHAT I AM THINKING ABOUT NOW:
- Peanuts: white mold, white mold. The conditions are here. Don’t be shy or timid. Leaf spot: much of our crop is at (or beyond) the “witching hour” of 30 days after planting. Now is time for leaf spot sprays. If it is very dry, one can safely extend spray intervals. But be smart. NEMATODES: Growers wanting to protect their crop (the pegs and pods especially) from root-knot and lesion nematodes SHOULD apply PROPULSE (13.6 fl oz/A) or AgLogic (10 lb/A) to the crop between 45 and 65 days after planting. Remember the “magic word” to success: IRRIGATION very very soon after application. If this stuff doesn’t get into the soil then it doesn’t matter for nematodes.
- Corn: Not very worried about any diseases other than southern corn rust. We know if is sprinkled across the Coastal Plain. Already causing damage in a few isolated fields, building in others. Corn to late milk stages and beyond is most likely ok. Corn at early milk stage, silking, tasseling, or even younger is vulnerable. Got a good crop and good yield potential? Me? I say protect it….
- Cotton: first week of bloom may be too early to spray but it the RIGHT time to get out there and look for target spot and areolate mildew. Conditions now are favorable for both diseases. If these diseases don’t show up until late, no need for a fungicide. But if they come i n early, be prepared….. ALSO: IF YOU SEE SOMETHING IN YOUR COTTON THAT LOOKS LIKE A VIRUS, STUNTED, DISTORTED, RED, DROOPING, let us know so we can check for virus.
- Soybeans: Rust is everywhere in kudzu along the Coastal Plain. The Match is Lit. I would spray my beans when I put our Dimilin and boron. No later than R3, early pod set.