folded leaves by a worm

[zack67360]

Hello,
I have some vines, and the last few years near the end of the season I've noticed the leaves are folded in half, held together by a web, and a worm between the folds. Also, I believe some of the leaves have been munched on. What can I do about this without possible contamination to the grapes? The grapes seem fine, but the vines look terrible with the leaves like this. Thanks
zack

 

[UglyBhamGuy]

Grape Leaf-folder (Desmia funeralis)

http://entnemdept.ufl.edu/creatures/fruit/grape_leaffolder.htm

 

[Runningwolf]

Are you spraying your vines? I know the vineyard owners around here spray regularly.

 

[zack67360]

Yes, that is what my grapes get is the grape leaf fold. What do you spray with, and when do you start and stop?
Thank you,
zack

 

[djrockinsteve]

I use a basic Ortho virus/fungus etc spray from the H. Depot. You have to start early but not during budding/flowering time. I believe you need to spray every 4 weeks, I have to look it up again as I have just started again. It only needs to be on the leaves a few hours to be effective.

Alternate intervals are to be sprayed with an insecticide.. This is to contine thru a few weeks before harvest.

I have a problem with fungus more than anything else. Too many and long damp days in the spring. Once the fungus's start it's real hard to control.

To answer your question better I would visit your local depot type store or garden center and grab the smartest person there and grill them.

 

[grapeman]

Grape leaf folders are easily controlled with applications of sevin. That also control Japanese Beetles , Rose Chafers, Steeley Beetles and Grape Berry moths. Only spray as needed and quit spraying two weeks or more before anticipated harvest. Check the label recommendations for your own state.

 

[zack67360]

Thank you. What exactly does the mold on the grapes look like? I haven't noticed anything with the grapes, other than some are withered amongst the good ones. But I figured it was bugs as I've noticed wasps on the grapes that appear to be eating.
z