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Table 54. Effectiveness of Fungicides on Grape Diseases

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Table 54. Effectiveness of fungicides on grape diseases.
Fungicide FRAC Group Phomopsis Cane and Leaf Spot Black Rot Downy Mildew Powdery Mildew Botrytis Rot Bitter Rot Anthracnose
Abound/Azaka a 11 ++ ++++ ++++ ++++ + ? ++++
Aliette 33 0 0 +++ 0 0 0 0
Aprovia 7 ? ++ 0 ++++ + ? ++
 Armicarb N/A 0 0 0 ++ 0 0 ?
Bordeaux mixb N/A ++ ++ ++++ +++ ++ ? ?
 Botector N/A 0 0 0 0 ++/+++ ? ?
Captan/Captec M4 ++++ + +++ 0 + ++ ++
Copper & lime M1 + + +++ ++ 0 ? ?
 Double Nickel 44 ? ? ? ++ ++ ? ?
Elevate 17 0 0 0 + ++++ 0 ?
Elite 3 0 ++++ 0 +++ 0 0 ++
Endura 7 0 0 0 ++++

++/++++

0 +++
Ferbam M3 + +++ + 0 0 + ?
Fixed Copperc M1 + + +++ ++

0

+ ?
Flinta 11

++

++++ + ++++ ++/++++ 0 ?
Gavel 22 ++ ++ +++ + 0 0 0
Inspire Super 3/9 0/+? ++++ 0 ++++ +++ ? ++
JMS Stylet Oil N/A 0 0 0 +++ 0 0 ?
Kaligreen/Nutrol/Armicarb UN 0 0 0 ++ 0 0 0
Luna Experience 7,3 + +++/+ 0 ++++ +++/+ ? ?
Mancozeb/Dithanef M3 ++++ +++ +++ + 0 ++ +++
Milstop UN 0 0 ? ++ 0 0 0
Mettle 3 ? ++++ 0 +++ 0 0 +++
Oso/Ph-D 19 ? ? 0 ++ ++ ? ?
Presidio 43 0 0 ++++ 0 0 0 0
Pristine 11/7 ++ ++++ ++++ ++++ ++/+++ ? +++
Procure/Viticured 3 0 ++ 0 +++ 0 0 ?
ProPhyt/Phostrol 33 0 0 +++ 0 0 0 ?
Quadris Topa 11/3 ++ ++++ ++++ ++++ + ? +++
Quintec 13 0 0 0 ++++ 0 0 0
Rallyd 3 0 ++++ 0 +++ 0 0 +++
Ranman 21 0 0 +++ 0 0 0 0
Reason 11 0 0 ++++ 0 0 0 0
Revus 40 0 0 ++++ 0 0 0 0
Revus Top 3/40 0/+? ++++ ++++ ++++ 0 0 ++
Rhyme 3 0 ++++ 0 +++ 0 ? ?
Ridomilg 4 + ++ ++++ + 0 ++ ?
Rovrale 2 0 0 0 0 ++++ 0 ?
Scala 9 0 0 0 + ++++ 0 ?
Serenade N/A 0 0 0 0 + ? ?
 Sonata N/A ? ? + ++ + ? ?
Sovrana 11 ++ ++++ ++ ++++ ++ 0 ++++
Sulfurh M2 + 0 0 +++ 0 0 ?
Topguard 3,11 + ++++ ++ +++ + ? ?
Topsin-M 1 ++ + 0 +++ ++i ++ +++
Torino U6 0 0 0 +++ 0 ? ?
 Trilogy IRAC 18B ? ? ? ++ ? ? ?
Vangard 9 0 0 0 + +++ 0 ?
Vintage 3 0 ++ 0 +++ 0 0 ++
Vivando U8 0 0 0 ++++ 0 0 0
Zampro 45,40 0 0 ++++ 0 0 ? ?
Ziram M3 ++++ +++ ++ 0 0 0 ++

++++=excellent, +++=good, ++=moderate, +=slight, 0=not effective or not labeled, ?=unknown.  
*Restricted Use Material;  OMRI listed for Organic Production.
FRAC groups: 1=benzimidazoles and thiophanates; 2=dicarboximides; 3=demethylation inhibitors (includes triazoles; 4=acylalanines; 7=carboxamides; 9=anilinopyrimidines; 11=strobilurins; 12=phenylpyrroles; 13=quinolines; 17=hydroxyanilides; 33=unknown (phosphonates); M=chemical groups with multisite activity; UN=unknown or uncertain. Fungicides with 2 activity groups contain active ingredients with different modes of action.
For all products listed, read labels thoroughly for restrictions and warnings of phytotoxicity from tank mixes or sensitivity of certain cultivars.

a Do not use azoxystrobin (Abound/Azaka), kresoxim methyl (Sovran), or trifloxystrobin (flint) continuously. Rotate with other fungicide groups as per label. Azoxystrobin can cause serious injury to some apple cultivars. Avoid drift to apples and do not spray apples with equipment used for spraying Abound. Flint should not be used on Concord grapes. Sovran can injure some cherry cultivars.
b Bordeaux mix is a mixture of copper sulfate and hydrated lime; it may be purchased prepacked or mixed fresh by the grower.
c Fixed copper compounds that are registered for use on grapes include Kocide 101, BCS-Copper Fungicide, Ten-Cop 5E, copper oxychloride sulfate (C-O-C-S), and many other compounds and formulations. The main drawback of copper fungicides is the potential for severe injury to grape foliage, depending on variety and weather conditions, and for reduced vine vigor and yields even in the absence of visible foiar injury. Cool wet weather generally makes copper toxicity worse. Phytotoxicity can be lessened by adding spray loime. One should be very careful mixing other pesticides with preparations containing lime: many of these combiniations are incompatible. Excessive use of copper within 30 days of harvest may interfere with wine makein.
d Rally, and Elite can control black rot after infection has occurred. For effective control, infection periods must be monitored and funcidie applied within 3 dyas after the start of an infection period. Application of t hese materials and Rubigan and Procure to sporulating lesions of powdery mildew is best avoided to prevent selection of resistant strains of the pathogen. Continuous heavy use of this group of fungicides may result in the development of resistant strains of fungi.
e Continuous heavy use of this fungicide (iprodione) may result in the development of strains of fungi (esp. Botrytis) that are resistant to it. Iprodione resistant strains of Botrytis have been found in east coast vineyards. Do not routinely apply more than two iprodione sprays per season.
f Trade names for mancozeb include formulations of Manzate, Dithane, and Penncozeb.
g The Ridomil MZ formulation (Ridomil + mancozeb) will give moderate control of Phomopsis and black rot, due to the partial rate of mancozeb that is provided by applying the labeled rate of this product. The Ridomil Copper formulation will provide moderate suppression of powdery mildew, particularly on moderately resistant cultivars (e.g., Concord), due to the amount of copper provided by applying it labeled rate.
h Sulfur may cause damage to sensitive varieties, it should always be used under cool temperatures.
iTopsin-M is a benzimidazole fungicide very similar to Benlate. It is recommended only for protecting pruning wounds from canker diseases.