Disclaimer

STRAWBERRY DISEASES

Post-Planting


Disease Chemical and Formulation Rate/100 gal Dilute Acre Concentrate Remarks
Leaf spot (Mycosphaerella fragariae)

Leaf scorch (Marssonia fragariae)

Leaf blight (Dendrophoma obscurans)

captan 80WDG
OR
thiram 65WSB
PLUS
Topsin-M 70W
OR
Rally 40WSP
OR
Pristine 38WG
OR
Cabrio 20EG
OR
Orbit 3.6E
OR
Syllit FL
--

--

0.7 lb

--

--

--

--

--

1.9-3.7 lb

4-5 lb

1.0 lb

2.5 oz

18.5-23 oz

12-14 oz

4.0 fl oz

2.4-3.0 pt

Use approximately 150 gal of spray per acre. Apply the spray at 7-10 day intervals from the time new growth starts.  Do not apply more than 30 lb of captan/A/year. Do not apply more than 115 oz of Pristine/A/year. Do not apply more than 70 oz of Cabrio/A/year.  Note Restricted Entry Intervals and Preharvest Intervals on label.
Powdery Mildew (Sphaerotheca sp.) Rally 40W or WSP
Procure 50WS OR 480SC
Quintec
Torino
Inspire Super
Fontelis
Flint
Quadris Top
Mettle

Luna Priviledge
Sulfur
1.6-3.2 oz

--
2.5-5 oz

4-8 oz or 4-8 fl oz
4-6 fl oz
5-10 lb
3.4 oz
6-20 fl oz
10-24 fl oz
2.0-3.2 fl oz
12.0-14.0 fl oz

6.8 fl oz
4.0-6.0 fl oz

Begin applications when disease first appears. Repeat applications at 7-14-day intervals. Do not apply more than 30 oz of Nova/A/year.
Gray mold fruit rot (Botrytis cinerea
Rovral 4L or 50W

Captan 80WDG

OR
Thiram 65WSB

mixed with
Topsin-M 70W
OR
Scala 600SC

Switch 62.5WSB

Captevate 68WDG

Captec 4L

Fontelis

Pristine 38WSB

Inspire Super

Scala 600SC

Flint

Merivon

Tavano 5SC

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--

--


0.7 lb

--

--

--

--

--

--


--

--

--

--

--

1.5-2.0 pt or lb

1.9-3.7 lb

4-5 lb


1.0 lb

9.0 fl oz

11-14 oz

3.5-5.25 lb

2.5 qt

10-24 fl oz

18.5-23.0 oz

16-20 fl oz

18.0 fl oz

2.0-3.2 oz

8.0-11.0 fl oz

3.75-13.0 fl oz

Do not apply Rovral after first flower or more
than once/season.
For early spring sprays; Scala rates lower
when tank-mixed with Captan or Thiram.
Preventative fungicide sprays should begin
at first bloom and continue on a 7- to 14-day interval, making no more than 2 sequential applications of any fungicide (other than Captan or Thiram) before alternating to another product with a different fungicidal mode of action (FRAC Group number).  Rates of Elevate may be lowered to 1.0-1.5
lb/A when tank-mixed with Captan or Thiram.  Flint provides suppression only versus control.
No more than 3 applications per season.
Can be used as tank-mix partner for fungicide
resistance management; no more than 6
sprays allowed at 13.0 fl oz/acre.”

Phytophthora

Crown rot (Phytophthora cactorum)

Red Stele (Phytophthora fragariae)

Leather rot (Phytophthora cactorum)
MetaStar 2E AG
Ultra Flourish
Ridomil Gold EC

Phosphite products:
Aliette 80WDG
Agri-Fos
Phostrol
ProPhyt





2.5 lb (dip)
2.5 pt (dip)
2.5 pt (dip)
2.0 pt (dip)
2 qt (4 pt)
1 qt (2 pt)
1 pt


2.5-5 lb (spray)
2.5 pt (spray)
2.5-5 pt (spray)
2-4 pt (spray)
Phosphite products may be applies as dip treatment just prior to (same day as) planting or as foliar sprays after planting.  Foliar sprays after planting avoid possible spread of angular leaf spot.
Anthracnose Crown Rot: (Colletotrichum gloeosporioides; C. fragariae)

Or

Fruit Rot: (C. acutatum; C. fragariae)
Pristine 38WG
OR
Cabrio 20EG
OR
Captan 80WDG
OR
Thiram 65WSB
mixed with
Topsin-M 70WP
Or
QuiltXcel
OR
Quadris Top
OR
Abound 2.08F
OR
Switch 62.5WG
OR
Captevate 68WDG
OR
Inspire Super
OR
Flint

18.5-23 oz

12-14 oz

1.9-3.7 lb

4-5 lb

1 lb

14.0 fl oz

12.0-14.0 fl oz

6.2-15.4 oz

11.0-14.0 oz

3.5-5.25 lb

16.0-20.0 fl oz

2.0-3.2 oz
Crown rot: Begin sprays when disease in suspected or as soon as observed.
Fruit rot: Begin sprays before anthracnose develops.  Captoan or Thiram usually adequate for fall contol. Tank-mix with Topsin-M for ealry speirng sprays.  Flint suppresses anthracnose versus control.
Both diseases: Sprays should continue on a 7- to 10-day schedule.  Make no more than 2 sequential applications of fungicides other than Captan or Thiram before alternating to another product with a different fungicidal mode of action (FRAC Group number).
Angular leaf spot (Xanthomonas fragariae)
Various formulations of:
Basic copper sulfate
Copper hydroxide
copper salts of fatty and rosin acids
Cuprous oxide

Actigard 50W
See labels
2.0-3.0 lb
See labels
--
0.35-0.58 lb ai
3.0-4.0 pt

1.05-4.2 lb ai

0.5-0.75 oz
Scout fields regularly for first sign of diseases after plant establishment.  Avoid overhead irrigation/frost protection.  Begin sprays at first sidn of disease and continue on 7- to 10-day interval until conditions improve or first sign of crop injury from sprays.
Do not apply Actigard within 5 days of transplanting, or to plants stressed by drought or excessive moisture, cold, etc.

Note: Quadris is extremely phytotoxic to some apple cultivars.  Prevent spray drift and left over residue in the spray tank which may come in contact with apples.
 


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Web Site Author: Douglas G. Pfeiffer