Year-Round IPM Program Pages
This year-round program section covers the major pests of table grapes grown in California. For wine and raisin grapes, see WINE AND RAISIN GRAPE YEAR-ROUND PROGRAM.
- San Joaquin Valley, June to July; Coachella Valley, May
- Mitigate pesticide effects on air and water quality.
What should you be doing during this time?
Mark locations of vines with poor growth for future confirmation and management of abiotic disorders or pests:
- Pierce's disease
Monitor for Botrytis bunch rot, powdery mildew, and summer bunch rot. Hedge canopy to increase air movement and reduce humidity in the fruit zone. Manage if needed according to the Pest Management Guidelines.
Monitor caterpillars if they have been a problem in the past:
- Omnivorous leafroller
- Grape leaffolder
- Western grapeleaf skeletonizer
Keep records (example monitoring form ).
If necessary, manage birds with netting or scare devices as fruit ripens.
Remove weeds that have escaped treatment before they set seed.
Consider the use of plastic vine covers for late harvest varieties, which are susceptible to to Botrytis bunch rot after heavy rain.