Are Temperatures Too High to Safely Apply Herbicides in Turf?

Are Temperatures Too High to Safely Apply Herbicides in Turf?

Many herbicide labels will contain a statement such as “Do not apply when temperatures are above 90° F”.  Turf managers who carefully follow label instructions will see these disclaimers and may hesitate before applying herbicides. There are several factors turf managers should consider when applying herbicides in summer.

Lawn burweed: What is this weed with sharp spurs in lawns?

The warming of spring days brings about a flurry of spring sports activities. All of a sudden, players begin to complain about the field. “There’s some little weed out there that has stickers on it”. The coaches quickly huddle around the “sticky problem” and observe that the field is infested with a spiny, low-growing weed that is annoying the players. The question becomes “What is this weed and how the #!*@ do we get rid of it?”

Follow herbicide label to avoid killing landscape plants and trees

An herbicide designed to kill weeds in turfgrass can also kill neighboring trees and shrubs. Herbicides in the phenoxy chemical class provide broadleaf weed control in lawns (2,4-D; MCPP; dicamba; clopyralid; and triclopyr). These chemicals are considered very safe and leave very few toxicity concerns for animals but we need to protect landscape trees and shrubs with some special precautions.

Is it okay to apply herbicides to lawns during green up?

Turf can be more sensitive to stresses during greenup – especially herbicides. What herbicides can I use during greenup, which ones can I not use? How can I reduce the impact of herbicides on turf? What are the effects of herbicide use on lawns. Image – White clover, Whitney Cranshaw, Colorado State University, Bugwood.org