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Wheat Seed Treatments A Must!

Author: Albert Tenuta - Field Crop Plant Pathologist/OMAFRA Ridgetown
Creation Date: 04 October 2006
Last Reviewed: 04 October 2006
I can not stress enough - the use of untreated wheat seed is highly discouraged not only in areas with a history of dwarf bunt but in all areas of the province. Many economically important and very common wheat diseases in Ontario are managed effectively through fungicide seed treatments. We have seen an increase in some of these diseases as a result of either not using a fungicide seed treatment or poor seed fungicide seed coverage. Remember if the fungicide is not there it can not work!

The following tables look at the various fungicide seed treatment options available for winter wheat in the province and the diseases they are effective against. Please note (1) refers to suppression only.

Table 1. Seed-Borne

Seed-Borne
Active Ingredients
carbathiin + thiram
difenoconazole + metalaxyl-M
metalaxyl-M
tebuconazole
triadimenol
triticonazole and thiram
Products
Vitaflo-280
Dividend XL RTA
Apron XL
Raxil FL
Baytan 30
Gemini
Formulation
F
F
F
F
F
F
Loose Smut
+
+
-
+
+
+
Seed-Borne Septoria
-
+
-
-
-
-
Seed-Borne Fusarium
+
+
-
+
_
+
Seed-Borne Dwarf Bunt
+
+
-
-
-
n/a

Table 2. Soil-Borne

Soil-Borne
Active Ingredients carbathiin + thiram
difenoconazole + metalaxyl-M		 metalaxyl-M tebuconazole triadimenol triticonazole and thiram
Products Vitaflo-280 Dividend XL RTA Apron XL Raxil FL Baytan 30 Gemini
Formulation
F
F
F
F
F
F
Soil-Borne Dwarf Bunt
-
+
-
-
-
n/a
Common Bunt
+
+
-
+
+
+
Common Root Rot
+
+[1]
-
+[1]
-
+[1]
Take All
-
+[1]
-
-
+[1]
-
Pythium Damping-off
-
+
+
-
-
+
Soil-Borne Fusarium
+
+
-
+
-
+

 

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