Peter from Columbia, Md writes
I live in Central Maryland and the Hemlock tree is about 16 feet tall. I've previously used imidacloprid (once) as a drench. Would basal bark spray application of Safari be as effective as drench?
You can apply Safari 20SG as a drench or as a basal trunk spray for woolly adelgids. Most folks will use the trunk spray for ease of application and quick uptake. You can view these instructions on page 8 of the Supplemental Label here. You would use 12 – 24 oz per gallon of water. Depending on bark type and thickness, one gallon of spray solution will typically cover 65-85” of cumulative trunk diameter. Here is a link to an application video with Safari from the manufacturer that we recommend watching: http://www.valent.com/professional/products/safari/video.cfm For foliar spray, you would use 1 tsp per gallon of water to cover about 200 square feet. For the best application timing in your area, we would suggest contacting a Master Gardener.
Answer last updated on: 09/09/2016
