Hi folks!

I have tiny white grubs about 3/8 inches long by 1/16 thick that hide in the curled leaves of my apple trees. (2 Macs and 1 Spy). All the leaves of the tree have holes in them about 3/4inch and some appear eaten around the edges. I suspect they feed at night.

Is there a spray I can use that this parasite isn't resistant to.?

I sprayed with Superior's brand dual bottle kit of sulphur/lime which contains Calcium polysulphide at 23%, along with their mineral oil with seemingly no effect. The grubs look just has content and cozy,Ha! That was yesterday morning and we had 2 great sunny days without rain. Maybe it takes time to take effect, but I can't risk any further attacks. Don't know how much shock these trees can handle and what other stages this insect metamorphs to. My apples are pea sized now and I'm concerned.

Thanks for the help.

Andy