Turf Tips Archives
Late May is Good Time to Fertilize Lawns
The annual phase of rapid cool-season shoot growth of cool-season grasses is nearly complete, though it was diminished this year because of the dry and cool weather. It’s now time to consider fertilizing your lawn because fertilizer now will not dramatically increase vertical growth as long as moderate nitrogen rates are used and it will […]
Which is it, Annual Bluegrass or Kentucky Bluegrass?
Kentucky bluegrass is currently producing seedheads that are difficult to mow and create an uneven appearance. However, annual bluegrass (Poa annua) is also producing similar looking seedheads. It’s important to distinguish the two because Kentucky bluegrass is highly desirable in a lawn, but annual bluegrass is a weed. It is a weed because it is […]
Annual bluegrass (Poa annua) in Full Bloom in Lawns and Athletic Fields
Annual bluegrass is now very common in lawns and athletic fields, though it has been a problem on golf courses for years. Annual bluegrass is a lighter green than Kentucky bluegrass and perennial ryegrass, and will thin and die during the heat and drought of August in Indiana. It’s especially noticeable now because of it’s […]
Don’t Trust the Tonics You Hear on TV
There’s a number of “tonics” recently extolled on local and national television that include ingredients like shampoo, ammonia, cola (not diet of course), beer (not light beer), hydrogen peroxide, and dish soap among others. Though you may think you see some effect of these products, there is little or no scientific basis for applying these […]
Season-long Grub Control from May Applications???
Grub control products are currently being displayed in the center aisles of retail department and discount stores and are advertised on the radio as providing season-long grub control when applied in early May. Certain insecticides, including imidacloprid (Merit) and halofenozide (Mach 2) do have a very long residual in the soil. However, they should not […]
Bentgrass Species and Cultivar Selection Impacts Annual Bluegrass Invasion in Renovated Bentgrass Fairways
Along with the warmer spring temperatures two things are certain; crabgrass will eventually germinate and annual bluegrass will profusely flower. For anyone managing bentgrass fairways or considering a bentgrass fairway renovation some of our recent research results will be of particular interest and provide some food for thought. There has been some mild interest in […]
Time is Running Out for Preemergence Control of Crabgrass
The below average temperatures the last few days has delayed crabgrass germination and thus premergence annual grass herbicides should still be effective if applied this week in the northern half to 2/3rds of the state. Most of the preemergence herbicides do have some post-emergence properties that will burn back small crabgrass (one or two leaf […]
Watch for Breakthrough from Early Preemergence Herbicide Applications
The extremely dry spring may reduce the effectiveness of preemergence herbicides. The products must be watered-in or rained-in to move them below the canopy and down to the soil where they will be effective. Herbicides not watered-in may also photodegrade faster than those wateredin. Early research showed a 44% loss in three days of preemergence […]
Rhizoctonia Large Patch (Zoysia Patch)
As our zoysiagrass fairways and tees are greening up this spring, we will soon begin to see the symptoms of Rhizoctonia Large Patch (zoysia patch). Rhizoctonia Large Patch (RLP) is the only major disease of zoysiagrass in Indiana. The pathogen is favored by moderate temperatures and long dew periods in the spring, fall and during […]
Slowly Greening Lawns
Many lawns are slow to green-up this year and it is mostly due to the presence of Kentucky bluegrass. Even though Kentucky bluegrass is the best lawn grass for the Midwest, it is much slower than perennial ryegrass and tall fescue to green up in the spring (photo). A little patience, some rain, and some […]
Spring Dandelion Control for Professionals
Many turf areas did not get treated for broadleaf weeds last fall because of the dry weather. Though fall applications are most effective for controlling broadleaf weeds, spring applications are warranted for new lawns or areas that did not get treated last fall. Spring applications will be most effective if you wait until dandelions are […]
Tan Patches in an Otherwise Green Lawn
Tan patches in an otherwise green lawn at this time of the year are likely due to either slow-greening warm-season grasses or snow mold. The most common tan patch right now is warm-season grasses like nimblewill or zoysia (photos). Time, warming temperatures, and rainfall are the cures for most of these patches and they should […]
Dark Green Patches in Otherwise Lighter Green Lawn
Patches of tall fescue or perennial ryegrass are currently much greener than Kentucky bluegrass (photos). Patches of these two grasses are prominent right now as the bluegrass is just starting to green up. Give it another week and the bluegrass will catch up with the tall fescue or ryegrass. No control is needed to remove […]
Star of Bethlehem, Spring Beauty Emerging in Shaded Areas
Star of Bethlehem and Spring Beauty are currently emerging and flowering in shaded areas. Both plants have pretty white flowers with the Star of Bethlehem having six petals while Spring Beauty has only five petals . The Star of Bethlehem was once planted as an ornamental while the Spring Beauty is native. Both plants are […]
Dandelions: Friend or Foe?
The annual bloom of dandelions is already here in southern Indiana and just around the corner in the rest of the state. Though some find dandelions attractive and some may actually eat them in salads or wine, others consider dandelions as weeds and try to control them in a lawn. The optimum time to control […]
Buyer Beware: Annual Ryegrass is Not a Persistent Turfgrass Species for Indiana Homelawns
There are many cool-season turfgrasses suitable and adapted to home-lawns in Indiana. They include; Kentucky bluegrass, turf-type tall fescue, fineleaf fescue and to a certain extent even “perennial” ryegrass. Many new lawns are established using seed because it is much less expensive than sod. Unfortunately, in many instances inexperienced homeowners or landscape contractors often purchase […]
Herbicide Delays after Seeding
Almost all herbicides will affect turfgrass seedlings and application delays are usually needed following seeding. Following is information gleaned from available labels of most herbicides or herbicide types that would be used in Indiana . This is intended to provide a general idea of the limitations of each active ingredient, but please refer to the […]
Tracking Growing Degree Days
Many of our pest problems in turf can be at least partially predicted through growing degree day models (Poa annua seedheads is one example). Most of the models use a base temperature of 50 (abbreviated as GDD50) assuming 50 degrees is the temperature when most of our biological activity starts occurring. GDD50 for IN can […]
Spring Weed Control or Seeding?
With last year’s late summer and fall drought, many areas are in need of reseeding. The question comes up about seeding and weed control: should the weeds be controlled first or should the seeding be done first? This seems like a simple question, but it’s fairly complex depending on the turf and weed species present […]
Timing of Preemergence Herbicides
If a preemergence herbicide is justified on a turf area, the timing of application is important. In theory, applying too early will expose the herbicide to soil microbes and processes in the soil that may break it down, allowing crabgrass to germinate during the latter part of the summer. Conversely, applying too late may miss […]