I would say no. I'm sure you killed a lot of them, but rain will quickly let them recoup, so you have had some practice, so it should take far less than 2 hours this time.........2 hours?, how many acres do you have?

Jon

jonny said it.. but i am going to rephrase it ...

its a contact kill ... so hopefully you hit some ...

it is NOT A PREVENTATIVE ... rain after is irrelevant ...

if you missed... wasted solution ...

and i hope you sprayed.. by inserting the wand.. and spraying the undersides of the leaves.. and the petioles.. allowing it to run down into the crowns... first .. because that is where they would be hiding..

and second.. because you could stain the leaves ... if in sunlight or heat ... or disturbed the waxy blue coating ...

and i hope you used a very coarse spray.. so it ran down ... rather than misting it ...

hey??? ... oh.. canada.. eh ??? ... you spent 2 hours in the hosta... is that ever wasted time???

ken

ps: did you see what i did there.. oh canada ... if it werent for hockey games.. who would have known.. lol...

Thanks Jon and Ken.

Property is one and a half acres, but not all covered in hostas...(I wish!)

No, I only used a small 1 liter spray bottle - my trigger finger was overworked after it all. If this ammonia thing works, I'll invest in a proper sprayer.

Thanks again.