when to spray pumpkins
To prevent vine borer infestation, begin spraying pumpkin plants in mid-June. The squash vine borer (Melittia cucurbitae) is an insect pest that attacks members of the cucurbit family, including cucumbers, melons, squash and pumpkins. The culprit is the larva of a wasplike moth that bores into the stems of cucurbit vines where it feeds, often with devastating results.