(Article from June 30th, 2020 Horticulture e-Newsletter)
We have been receiving numerous reports of brown patch showing up on tall fescue. This disease is favored by warm night temperatures and extended periods of leaf wetness. If you go outside in the morning and the lawn is covered with dew and the temperature is in the high 60s or higher, it means that conditions are getting right for brown patch. The fungus is primarily a leaf pathogen and does not attack the roots. During severe outbreaks, the fungus may invade the lower leaf sheaths and crown and kill plants. But in most cases, the turfgrass can recover from brown patch. This recovery may take two to three weeks, depending on weather. To read more, visit the Horticulture e-Newsletter: https://hnr.k-state.edu/extension/info-center/newsletters/2020/June30_2020_26.pdf
Revised by Brooke M. Garcia, original post by Dr. Jared Hoyle
We have been receiving some precipitation recently across the state of Kansas. Even if you have received little rain in your area, you may be seeing yellow nutsedge popping up everywhere. Yellow nutsedge does favor moist soils but it can also grow in well-drained sites.
One of the easiest ways to identify yellow nutsedge is by a couple special features;
gradually tapering leaves to a sharp point
tubers not in chains
To control yellow nutsedge, if you can get applications out before tuber production then you will see increased control. But beware, yellow nutsedge will continue to grow as long as the environment is favorable for growth, so more than one application may be necessary.If using a herbicide application timing is critical. During mid-summer, yellow nutsedge starts making tubers and if you apply herbicides before tuber production you will get better control. If you wait until the yellow nutsedge is big and starting to make tubers then you will be playing catch-up all year. So sooner is better. Don’t wait for it to get too big.
Here are some options for yellow nutsedge control for turfgrass professionals;
pyrimisulfan (new herbicide that provides yellow nutsedge control)
There are many different products out there that contain these active ingredients so just make sure you have an active ingredient that has yellow nutsedge control! Also make sure you check for turfgrass tolerances.
Always remember to READ THE LABEL for the correct rate, turfgrass tolerance, and specific instructions before application.
***Mention of trade names or commercial products in this article is solely for identification purposes and does not imply recommendation or endorsement, nor is criticism implied of similar products not mentioned by Kansas State University.***
Happy National Pollinator Week! National Pollinator Week occurs every year around mid-June. This year, June 22-28th, 2020 is dedicated to celebrating pollinators and promoting how we can protect them in the landscape and/or environment. What can you do this week to protect or promote a pollinator?
Here are some ideas to show your support:
Plant native plants in the landscape
Educate employees on pesticide safety
Display pollinator artwork and outreach materials in your office lobby
Highlight Pollinator Week in a newsletter, blog, or magazine
Host a nature walk or pollinator expert lecture
Use the hashtag #pollinatorweek to promote pollinator week, events and resources shared.
For more information about National Pollinator Week, you can visit the official website.
The K-State Garden Hour is a successful online webinar series, hosted by K-State Research and Extension. Each week, the series is hosted on Wednesdays from 12:00 – 1:00 P.M. CST. This virtual series will provide information on a variety of horticultural topics, as well as highlight educational topics related to plant selection, entomology, plant pathology and integrated pest management.
Here are the upcoming topics for the month of July:
Crabgrass is now becoming quite visible. If you didn’t apply a preemergence herbicide, or had some crabgrass emerge even where it was applied, now is the time to consider postemergence control. If a preemergence herbicide was applied, but you’re still seeing crabgrass, there may have been variability in uniformity of delivery over the area to which it was applied. If new sod was laid recently, it’s common for crabgrass to emerge through the seams. Control is easier when plants are young, for they are rapidly growing and have a thinner leaf cuticle. Make sure the crabgrass plant isn’t under stress before you apply the herbicide; rainfall or irrigation on the area within a few days prior to application can help ensure the herbicide is absorbed and translocated. Dr. Hoyle wrote a nice summary of best approaches to postemergence crabgrass control here: https://blogs.k-state.edu/turf/postemergent-crabgrass-control