(Megan Kennelly, KSU Plant Pathology)
It seems like we were just talking about all our summer diseases and summer stress, but now we need to be thinking about fall. September is the time to be thinking about large patch in zoysiagrass.
There is some great info about large patch control at this link, starting on page 14.
http://www2.ca.uky.edu/agc/pubs/ppa/ppa1/ppa1.pdf
We’ve done quite a few trials at KSU over the years, and our results match pretty closely with the efficacy data shown at the above link. Regarding timing, we’ve had good control from most application timings in September.
Large patch tends to be in the same areas from one year to the next, so one option is to map out “hot spots” and focus on those.
If you just can’t get enough large patch info, you can check out some short videos here that I made awhile back:
Part 1: (5 min symptoms/biology) https://www.youtube.com/watch?v=zD-dlw9NfLk
Part 2 (14 min – management): https://www.youtube.com/watch?v=EIl0bsLYatI
