Sprayed with Sevin and killed everything.

Sprayed with Sevin and killed everything.

About 4 days ago I bought some Sevin concentrate. I then bought a new 1-gallon spray tank at Wal-Mart also. I mixed the concentrate with 4 oz of Sevin to 1 Gal of water. I mixed it in the tank and then sprayed my entire Grape vineyard, eight grape plants. I then sprayed my Blackberries, Blueberries, and Raspberries. Also sprayed my Roses, Blackgum, bearded trees. Finally I did my small orchard of young trees, Peach, Nectarine, and Cherry. Next morning when I went to check everybody out I found most everything brown and falling leaves. The only tree I didn’t spray was a small dwarf Peach which remains in good health. The following morning I could see the grass was dying all around the spray pattern of everythin. As of this Am almost all are dead with no signs of life. We also had a small thunder storm on the second day that was to late to effect the spray.
I have been using Sevin for some time, like 30 years and from a small spray bottle as well as dust and it never caused problems. This was the first time I used the concentrate because of the quantity I needed to care for.
I plan to call Walmart and make them aware but seriously doubt they will be concerned unless they have had a prior complaint. I will call the number listed on the concentrate but feel they will say I made a mistake. It looks like what Roundup or a similar product will do. I plan after rain is over to spray a portion of grass and see what happens.
This post is to see if anyone has ever this type of problem. I am 80 years old on my farm in Tennessee and am not senile at this point. Any input would be appreciated.

Oh no. The site I was looking at says mix 1.5 ounces of Seven to a gallon of water. That's quite a difference in the mixture and must be what killed your plants.

Yes, sounds like chemical burn of the foliage from too high concentration of the insecticide. Also: spraying on hot sunny days is often counterproductive to plants.

Double-check the label recommendation for the Sevin you purchased, and see what the listed rates per gallon of water are.

You may be in luck, that only the existing foliage was burned/killed - and your plants may leaf back out. I would water all your plants very thoroughly - the equivalent of an inch of rainfall to give them a boost to push out dormant buds.

Roundup/glyphosate products don't even work that fast (4 days). I think you would have to use a burn-down herbicide to get that rapid effect.

Upon re-reading your message, I see that you said that you mixed the product with water in the tank. That's a mistake. To get proper and thorough mixing, you should always mix your pesticide with water in a separate container, and then when thoroughly mixed, pour it into the sprayer.

Obviously, none of us were there to take notes on what you did. Too high concentration, or too poor mixing allowing too concentrated chemical to be applied, seem to be the likely culprits.