Grape – Powdery mildew

Crop(s):          Grape

Disease(s):     Powdery mildew

Resistance management strategy for:

Guidelines:

1. Apply all these fungicides preventatively.
2. Consecutive applications include from the end of one season to the start of the next. Medium to high risk fungicides (Group 7 and 11) if used consecutively should be applied in a mixture or co‑formulation with a registered, alternative mode of action for which resistance is not known – where these fungicides have been routinely used for many seasons, field research indicates there is an increased risk of powdery mildew resistance. To ensure effective powdery mildew control in these circumstances, either use alternative modes of action or apply in mixtures.
3. Do not apply more than two consecutive sprays of Group 3, 5, 13, 19, 21, 50 and U6.
4. Do not apply more than three Group 21 containing products per crop, or a maximum of 33% of total applications (whichever is lower). Continue alternation of fungicides between successive seasons.

5. 		Group
   		3	5	7 (Incl. 7+3, 7+12)	11 (Incl. 11+3)	13 (Incl. 13+3)	19	21	50	U6
   Total number of powdery mildew targeting sprays	1	1	1	1	1	1	1	1	1	1
   	2	2	1	1	1	2	2	1	1	1
   	3	2	2	1	2	2	2	1	1	1
   	4	2	2	1	2	2	2	1	2	2
   	5	2	2	1	2	2	2	1	2	2
   	6	3	3	2	2	3	3	2	3	2
   	7	3	3	2	2	3	3	2	3	2
   	8	3	3	2	2	3	3	2	3	2
   	9+	3	3	3	2	3	3	3	3	2

   N.B. Consecutive sprays include mixture formulations.