As the wet rainy summer continues, disease pressure continues to be high. As noted in a May 15th blog post, dollar spot has been extremely active this year. Leaf Spot has also been lingering across the state for 2 months. Leaf spot is an ascomycete fungi caused by Bipolaris spp. and/or Dreschslera spp. A majority of the damage recorded to this point has been on Kentucky bluegrass lawns, athletic fields and golf course rough, but symptoms on bentgrass fairways/greens have also been seen.-from Iowa State Turf
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