The Blueberry News – July 2019

26 | The Blueberry News FloridaBlueberryGrowers.org

TABLE 9. EFFICACY OF SELECTED FUNGICIDES AGAINST BLUEBERRY DISEASES

CONTINUED

Fungicide Rust

Anthracnose

leaf spot

Septoria leaf

spot

Ripe rot

(anthracnose)

Phomopsis

twig blight

Alternaria

rot

Botrytis

(gray mold)

Mummy

berry

Phytophthora

root rot

NA + ++ ++ ++ +++ ++ +++ NA

Captan

(Captan,

Captec) [M4]

* tank mix with

captan products

during bloom to

prevent fruit rots

topic of the season

continued on page 30

continued from page 18

NA NA NA NA NA NA ++++ ??? +++

Do not use Do not use Do not use Do not use Do not use Do not use Do not use Do not use Do not

before before before before before before before before use before

harvest. harvest. harvest. harvest. harvest. harvest. harvest. harvest. harvest.

Chlorothalonil

(Bravo®) [M5]

NA ++ +++++ +++++ +++ +++++ +++ ++++ ???

Cyprodinil +

fludioxonil

(Switch®)

[9+12]

NA + ++ ++ ++ +++ ++ +++ +++

Fenbuconazole

(Indar®)* [3]

NA ++ +++++ NA NA NA NA NA NA

Fenhexamid

(Elevate®) [17]

NA ++ +++++ ++ ++ +++ ++ ??? NA

Fenhexamid

+ captan

(Captevate®)

[17+M4]

NA NA ++ ++ +++ +++ NA NA NA

Fluazinam

(Omega

500F) [29]

NA??? NA NA?? NA

Fluopyram +

pyrimethanil

(Luna

Tranquility)

[7+9]

+++ NA NA NA + + ++++ +++ NA

Fosetyl-Al

(Aliette®

WDG) [33]

+++ NA NA NA NA NA ++++ ++++ NA

Mefenoxam

(Ridomil

Gold®) [4]

NA +++++ ??? ??? ++++ ??? ++++ ++++ ++++

Metconazole

(Quash) [3]

+++ NA NA NA NA NA ++++ ++++ NA

Mono- and

dipotassium

salts of

phosphorous

acid

(Agri-Fos®,

K-Phite®) [33]

+++ NA NA NA NA NA ++++ ++++ NA

Potassium

phosphite

(ProPhyt®)

[33]

NA +++++ NA NA NA NA ++++ ??? +++

Propiconazole

(Orbit, Tilt,

Bumper,

PropiMax [3]