We are just past the halfway point in October and some parts of the state have yet to receive any considerable rainfall this month. After being bombarded with rain during the summer months, the Des Moines area has received a measly 0.03 inches of rainfall so far in October. Their last considerable rainfall event took place on September 25. Depending on what happens the remaining 14 days of the month, October could go down as one of the driest on record. Irrigation systems that didn’t get much use during the rainy summer months are surely being used during this stretch of dry weather. The picture below from the National Weather Service shows that a good chunk of the Midwest is experiencing below average rainfall for October.
There hasn’t been too much activity (as far as stresses go) at the research station. We still have dollar spot working in some areas and rust and powdery mildew are showing up on Kentucky bluegrass. Grub damage at the station seems to be less this year compared to years past.
Other than the droughty conditions, the fall months have been conducive for turfgrass growth and recovery. Soil temperatures are holding steady in the high 50’s low 60’s. Those putting down natural organic fertilizers yet this fall, remember that those products require microbial activity to release the nitrogen contained in the product. Microbial activity usually ceases at 50 degrees. The dry conditions could also affect post-emergent herbicide applications as uptake and translocation are not as effective on drought stressed weeds.
I’ll leave you with some pictures of fall.
Regardless of the weather conditions, poa always seems to find a way to thrive.
This maple provides brilliant fall color on the north side of the ISU campus