Blueberry Diseases

Disease

Chemical and Formulation

Rate/100 gal Dilute

Acre Concentrate

Remarks

Mummy berry cups (Monilinia vaccinii-corymbosi)

50% urea mix

200 lb

Apply when cups appear (usually Delayed Dormant) Urea mix is 50% Urea sprills plus 50% inert materials. It supplies 45 lbs/acre nitrogen. Cups may also be covered with 1 to 2 inches soil by discing or raking.

Phomopsis twig blight (Phomopsis spp.)

lime sulfur
OR
Ziram 76DF
OR
Abound 2.08F
OR
Pristine 38WG
OR
Switch 62.5WG

2.5 gal

1.5 lb

5 gal

3.0 lb

6.2-15.4 fl oz

18.5-23 oz

11.0-14.0 oz

Lime sulfur One Delayed Dormant application. Do not use lime sulfur within 14 days of an oil spray or when temperature is above 75 degrees. Leaf burn may occur when used during periods of warm temperature. Apply Ziram at loose bud scale stage and 7 days later. Do not apply Ziram later than 3 weeks after full bloom. Do not apply more than two sequential applications of Abound before alternating with a fungicide that has a different mode of action. Begin applications before disease development and continue on a 7- to 14-day schedule, following resistance management guidelines. Do not make more than three applications of Abound or apply more than 1.44 qt of Abound/A/year. Abound may be applied the day of harvest. Caution: Abound is extremely phytotoxic to some apple cultivars. Prevent spray drift and leftover residue in the spray tank which may come in contact with apples.

Mummy berry twig/fruit infection

captan 80WDG
OR
Ziram 76DF
OR
Bravo Weather Stik 6F
OR
Abound 2.08F
OR
Pristine 38WG
OR
Captevate 68WDG
OR
Switch 62.5WG
OR
Indar 2F
OR
Orbit 3.6E
OR
PropiMax 3.6E

1.5 lb

3.1 lb

3.0 lb

3-4 pt

6.2-15.4 fl oz

18.5-23.0 oz

4.7 lb

11.0-14.0 oz

6 fl oz

Apply Ziram at loose bud scale stage and 7 days later. Begin Bravo applications

at budbreak and repeat through early bloom at 10-day intervals. Read the Bravo label for cautions regarding tank-mixing and phytotoxicity. Do not apply Bravo after full bloom or within 42 days of harvest. Do not apply more than 12 pt of Bravo/ A/year. Do not apply more than two sequential applications of Abound, Pristine, or Captevate before alternating with a fungicide that has a different mode of action. Begin applications before disease development and continue on a

7- to 14-day schedule, following resistance management guidelines. For control of mummy berry with Indar or Orbit, make the first application at early

greentip and make subsequent applications at 8-10 intervals. Do not make more

than 4 applications of Indar. Do not apply more than 24 fl oz of Indar, 30 oz

of Orbit 43.7 lb of Captan, 92.0 oz of Pristine, 21.0 lb of Captevate, 1.44 qt

of Abound, or 56.0 oz of Switch/A/year. Do not apply Indar or Orbit within 30

days of harvest. Pristine, Abound, and Switch may be applied the day of

harvest. Caution: Abound is extremely phytotoxic to some apple cultivars

including ‘Gala.’ Prevent spray drift and leftover residue in the spray tank

which may come in contact with apples.

Fruit rots (Anthracnose and Alternaria rots, esp.) (Glomerella cingulata, Botrytis cineareaAlternaria tennissima)

captan 80WDG
OR
Ziram 76DF
OR
Bravo Weather Stik 6F
OR
Abound 2.08F
OR
Pristine 38WG
OR
Switch 62.5WG
OR
Indar 2F
OR
Orbit 3.6E

1.5 lb

3.1 lb

3.0 lb

3-4 pt

6.2-15.4 fl oz

18.5-23.0 oz

11.0-14.0 oz

6 fl oz

Early Bloom to Post Bloom 7-10 day intervals. Observe pre-harvest and reentry restrictions. Do not apply more than 43.7 lb captan, 92 oz Pristine, 21 lb Captevate, 1.44 qt Abound or 56 oz Switch/A/yr. Pristine, Abound, Switch may be applied the day of harvest. Do not apply Ziram later than 3 weeks after full bloom. See Bravo and Abound cautions above.

Leaf Spots (Gloeosporium minus, Gloeocercospora inconspicua, Septoria albopunctata, Dothichiza caroliniana, Alternaria tennissima and Glomerella cingulata)

captan 80WDG
OR
Pristine 38WG

--

--

3.1 lb

18.5-23.0 oz

Postbloom to August at 7-10 day intervals. Observe preharvest and reentry regulations. For leaf spot control after harvest, resume spray schedule 1 to 2 times.