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 |
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 |
-- -- -- 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.
Virginia Apple Page | Virginia Pear Page | Virginia Peach Page | Virginia Vineyard Page | Virginia Small Fruit Page | Virginia Fruit Homepage | Mid-Atlantic Regional Fruit Loop |
---|