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mac43rn
05-25-2003, 11:30 AM
I get a call from one of our high end clients. She says they are having a few areas in their lawn turning brown. For the record we used 24-5-11 at 1/2 rate. That equals 1/2 lb of 50% slow release in March and she is ready for her second application of 11-0-11 Novex Natural. I show up and sure enough it looks like brown patch. We have had very wet conditions. Last week the humitidy was high and it was very muggy. The last few days have been ideal, with high temps in the mid 70's with very low humidity. Any suggestions.

SWD
05-25-2003, 11:59 AM
Brown Patch is a root borne fungus. Instead of foliar pictures, what do the roots look like?

GroundKprs
05-25-2003, 01:20 PM
Read about brown patch at http://www.agcom.purdue.edu/AgCom/Pubs/BP/BP-106-W.pdf . There are links on that page to other IN diseases. See also
http://www.ianr.unl.edu/pubs/plantdisease/g688.htm .

Your pic looks more like dollar spot. The regular bleached lesions are classic dollar spot symptoms. While we have not dealt with brown patch up here, I believe the BP lesions are irregular. See comparisons on the NE page above.

mac43rn
05-26-2003, 05:40 PM
I think it is dollar spot, but I just don't understand. Received normal amounts of fert. 1/2 lb in spring and just hit it with 1lb of N. Here are more pics.

KirbysLawn
05-26-2003, 11:58 PM
LEaf Spot: http://www.agcom.purdue.edu/AgCom/Pubs/BP/BP-107-W.pdf

grassguy_
05-28-2003, 08:38 PM
Pics sure look like Dollar spot and even with wet conditions the disease will progress and at times track with mowings. Keep fertility rate up and be careful of leaf spot if your temps have been cool like here.

mac43rn
05-28-2003, 09:00 PM
had sample under microscope and you are both correct. I have both leaf spot and dollar spot. Will be treating in AM with fungicide.

thanks