Home Fruit Gardens:Table 9.3. Pesticides for Blueberries
The important insects and diseases to be controlled, except for viruses, are listed in the right-hand column of this spray schedule. 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.
Caution: Broad-spectrum insecticides (those with a large number of pests listed on the label) have significant potential to be harmful to non-target organisms such as bees and other beneficial or predatory insects.
Follow all instructions and application rates listed on pesticide labels.
| Time to Spray | Suggested Materials | Pests to Be Controlled |
|---|---|---|
| Delayed Dormant--buds show ¼- to ½-inch green | Oil; lime sulfur | Scales; Phomopsis twig blight |
| Loose Bud--7 days later and just before blossoming | Captan | Phomopsis twig blight, mummy berry, and Botrytis blight |
| Pre-Bloom | Captan | Mummy berry and Botrytis blight |
| Full-Bloom | Same as Pre-Bloom | Same as Pre-bloom |
| Petal Fall | Same as Pre-Bloom plus Malathion or Carbaryl | Same as Pre-bloom plus fruitworms, weevils |
| First Cover--10 days after Petal Fall | Malathion or Carbaryl or Spinosad or Ensfenvalerate | Fruitworms, weevils |
| Maggot Spraysa--about July 1, repeat at 10-day intervals | Carbaryl plus Malathion or Spinosad or Pyrethrum | Maggots |
aMalathion may be applied one day before harvest.
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