Cucurbits – Downy mildew

Crop(s):          Cucurbits

Disease(s):     Downy mildew

Resistance management strategy for:

Guidelines:

1. Applications made within the nursery count towards the total number of applications allowed per crop. It is recommended that disease control is started early and maintain a regular program using a fungicide from groups other than Groups 4, 11, 28+43, 40, 45+40, 49 or 49+11.
2. When conditions favour disease development, do not wait for disease to appear, but apply two consecutive sprays of a Group 4, 11, 28+43, 45+40, 49 or 49+11 fungicide, at the interval recommended on the label, then resume the program of sprays using products from a different group to the fungicide just applied.
3. Do not apply more than four sprays of a Group 4 or Group 40 containing product per season.
4. Do not apply more than three sprays of a Group 49 containing product. Group 49 containing sprays should not consist of more than one in every three sprays of the total number of fungicide sprays per crop. Group 49+11 sprays count as both a Group 49 and a Group 11
5. Do not apply more than two sprays of Group 28+43, 45+40 or 11 containing fungicides (including 49+11) per crop.
6. Apply Group 4, 11, 45+40 and 49 (including 49+11) fungicides preventatively.
7. Apply Group 4 and 49 fungicides only in mixtures or co-formulations with a registered fungicide from a different mode of action group with no known resistance.
8. 1. Continue alternation of fungicides between successive crops. Do not make more than (6) six total applications of a Group 49 product per year on the same area targeting the same disease.

    

   	Group
   	4	11	28+43	40, 45+40	49, 49+11
   Maximum number of consecutive applications	2	1	2	2	2
   Maximum number of solo sprays	None				None of 49
   Maximum number of sprays per crop or season including nursery *	4	2	2^	2 or 4	3 ^ (or 1 in 3) 6 per year

   * Maximum application number on product label may differ. Ensure you follow the label recommendations.

   ^Not allowed in nursery production