Home Fruit Gardens: Table 6.6. Pesticide Recommendations for Grapes
Where black rot is a problem, apply a fungicide every 14 days after the "New Shoot" spray up to and including the "Before Ripening" spray. During long rainy periods, shorten the interval to 7 to 10 days between sprays. Spray in the rain, if necessary, to maintain the schedule of applications. Always consult the label before making pesticide applications. Labels vary greatly among commercial products of the same material. It is important to refer to the label for the best timing and application rates when applying pesticides. Also read the text for information on cultural practices to minimize the application of pesticides. Due to a wide array of various products containing the same active ingredient, for insecticide recommendations, when appropriate, the active ingredient is listed instead of the name of formulated product.
Follow all instructions and application rates listed on pesticide labels.
| Time to Spray | Suggested Materials | Pests to Be Controlled |
|---|---|---|
| New Shoot - when new shoot growth averages 4 inches | Captan or Mancozeb | Phomopsis, black rot |
| Before Bloom - just before blossoms open |
Captan + Mycobutanil or Mancozeb + Mycobutanil for diseases. Carbaryl (rose chafer) or Imidcloprid (leafhopper) |
Black rot, downy mildew, rose chafer, leafhopper |
| Post Bloom - immediately after Bloom |
Mancozeb + Mycobutanil for diseases. Bacillus thuringiensis (berry moth), or Imidaclprid (leafhopper) |
Black rot, powdery and downy mildew, phomopsis, botrytis, grape berry moth, leafhopper |
| First Cover - apply 10-14 days after Post-Bloom | Captan + Sulfur OR Mancozeb + Sulfur for diseases. Imidcloprid or Carbaryl (Japanese beetle) |
Black rot, downy and powdery mildew, botrytis, Japanese beetle |
| Second Cover - apply 2 weeks after First Cover | Captan + Sulfur | Black rot, downy and powdery mildew, fruit rots |
| Third Cover - late July or early August | Captan + Sulfur | Fruit rots, downy and powdery mildew |
| Before ripening - 10 days before picking | Captan + Sulfur | Fruit rots, downy and powdery mildew |









