STRAWBERRY DISEASES
| 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 |
--
2.5 lb 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 |
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 40WSP OR Orbit 3.6E |
-- -- |
2.5 oz 4.0 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 Leather rot (Phytophthora cactorum) |
Topsin-M 70W OR Rovral 50W or 4F PLUS Captan 80WDG OR Thiram 65WSB OR Elevate 50WDG OR Switch 62.5WDG OR Abound 2.08F OR Pristine 38WG OR Cabrio 20EG OR Scala 600SC |
0.7 lb -- 3.0 lb -- -- -- -- -- -- -- |
1.0 lb 1.5-2 lb 1.9-3.7lb 4-5 lb 1.5 lb 11-14 oz 6.2-15.4 oz 18.5-23 oz 12-14 oz 18 fl oz
|
Because of potential for
cross resistance
to
Topsin-M and to Rovral and because of ineffectiveness against leather
rot,
it is recommended that these compounds be combined with captan or
thiram
when possible. Although the preharvest interval for captan is 0 days,
protective
clothing must be worn if entering the planting within 1 day of captan
application.
Do not apply Rovral more than once per season or after first
fruiting
flower. Elevate, Switch and Scala are registered for control of gray
mold
only. Apply Elevate or Scala alone or in tank mix combinations
with the recommended rate of another fungicide (such as captan)
registered for grey mold control, beginning at early
bloom prior to establishment. Continue applications every 7-14
days, but avoid making more than two consecutive applications before
alternating with another registered gray mold fungicide. In tank
mix combinations, Elevate
may be used at the rate of 1.0-1.5 lb/A and Scala may be used at
9 fl oz/A. Pristine, Cabrio, and Abound may be
applied the day of harvest. Scala may be applied to one day
before harvest. Maximum/A/year: Captan 80WDG - 30 lb;
Elevate - 6 lb; Switch - 56 oz; Abound - 1.9 qt; Pristine - 115 oz;
Cabrio - 70 oz; Topsin M - 4 lb. Scala - 54 fl oz. Abound is extremely phytotoxic to
some apple cultivars, including 'Gala'. Prevent spray drift and leftover
residues in the spray tank which may come in contact with apples. |
| Fruit Rots Anthracnose (Colletotrichum fragariae) |
Abound 2.08F OR Pristine 38WG OR Cabrio 20EG OR Captevate 68WDG OR Orbit 3.6E |
-- -- -- -- -- |
6.2-15.4 oz 18.5-23.0 oz 12.0-14.0 oz 5.25 lb 4.0 fl oz |
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.
| Red Stele (Phytophthora
fragariae
and leather rot control:
Ridomil
Gold
is
registered for red stele
and leather
rot control. For established plantings apply a 1 pt/treated acre. Make
one application in the spring before first bloom. A second application
may be applied after harvest in the fall. For supplemental leather rot
control, an application may be made during harvest. Consult the label
for
use with irrigation and for rates for band application. For new
plantings
make one application after transplanting, a second one 30 days before
the
beginning of hravest. A third application may be made during harvest
season. |
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