Green grapes
Soak in soapy water and rinse well, to remove any external infestation (Illustration 272). Very tight clusters should preferably be cut and separated into small clusters before soaking. It is advisable to soak three times in soapy water and rinse well after each soaking. Look at each grape before you eat it. If you see a dark shadow, a hole, or a dark spot that penetrates below the surface, halve that grape and check inside for a worm (Illustrations 273, 274).
Black grapes, Hebron green grapes (Arab grown), or grapes from private gardensMore problematic. Soak in soapy water and rinse, like green grapes. Then halve about 10% of the grapes and check inside for worms. If infestation is found in this sample, each grape should be checked internally.
If the sample is clean, check each grape from the outside.
