10/8/2020 12:10 PM
in reply to
Jerry McVety
Jerry I had an incident with Sonar years ago. I treated a pond on the golf course with Sonar using a hand gun. Same spray rig I used on greens. The boom had an isolation valve. I cleaned the heck out of the tank and hose but thought the boom was isolated. Found out the hard way that the valve to the boom leaked, probably only a couple of ounces. Next time I sprayed greens the last couple of nozzles on each side killed turf for a few feet, most of it on the collar.
The damage was a bleaching much like we see today with Pylex and Tenacity. We saw similar damage in a couple of spots around the pond we attributed to golfers using ball retrievers and dragging out some treated aquatic weeds. Grass eventually recovered in all areas. No residual effects.
The pond we treated was upstream from the irrigation pond. We used to pump it down so there was no discharge for a few of days. Discharged water flowed through another small pond before reaching the irrigation pond. Never saw any bleaching in the second pond. Never an issue with the irrigation water.
So lots of lessons to be learned by this. Sonar is great (expensive). I had to treat the pond because it was the source of water for a fire pump for the clubhouse sprinkler system and permits required clear water. Fire department was going to shut us down.
I really think you will be OK with no issues in the spring. Tons of info on the label about irrigation delay. Good luck. Kenneth Ingram, UMD
Last modified on 08 Oct 2020 17:10 by Kenneth Ingram