sorry about your grapes foxy...I can get strong vinegar.it isefective against some bugs..then I hose off the plants later..it does them no harm.but your bugs I dont know.I would suggest ID the bugs & search online for a natural solution
(gem) Hvis du vil hilse på nogen, på deres eget sprog så prøv vores "spiller ordbog" under "mere om sprog" linket under flagene. (pauloaguia) (vis alle tips)