Vineyard sanitation is important for reducing certain overwintering pests
before the next growing season.
Prune vines late in dormancy after rains reduce Eutypa spore levels.
Destroy prunings of older infested wood to reduce pest sources according
to the guidelines below.
- Prune out and destroy mummies (dried-up
fruit) by flailing or shredding to destroy overwintering sites for:
- Omnivorous leafroller or orange
(in coastal areas).
- Remove mummy clusters from vines.
plow and disc to
bury weeds, mummy clusters, and ovewintering larvae living in
ground duff and dried berries.
- Vine mealybug: Steam sanitize
equipment before moving to an uninfested area of the vineyard.
- Branch and twig borer:
out and remove dead wood in
vineyards with a history of branch and twig borer. Destroy prunings.