Group 4 and 12 fungicides
Mode of Action
Fludioxonil and Metalaxyl-M are the active ingredients in Apron Maxx RTA.
Metalaxyl m = Group 4 = phenylamide – targets RNA polymerase I
Fludioxonil = Group 12 = phenylpyrroles – affects signal transduction
For resistance management, please note that APRON MAXX RTA Seed Treatment Fungicide contains Group 4 and 12 fungicides. Any fungal population may contain individuals naturally resistant to APRON MAXX RTA Seed Treatment Fungicide and other Group 4 and 12 fungicides. A gradual or total loss of pest control may occur over time if these fungicides are used repeatedly in the same fields. Other resistance mechanisms that are not linked to site of action but specific for individual chemicals, such as enhanced metabolism, may also exist. Appropriate resistance-management strategies should be followed.
To delay fungicide resistance:
Where possible, rotate the use of APRON MAXX RTA Seed Treatment Fungicide or other Group 4 and 12 fungicides with different groups that control the same pathogens.
Fungicide use should be based on an IPM program that includes scouting, historical information related to pesticide use and crop rotation and considers cultural, biological and other chemical control practices.
Monitor treated fungal populations for resistance development.
If disease continues to progress after treatment with this product, do not increase the use rate. Discontinue use of this product, and switch to another fungicide with a different target site of action if available.
Contact your local extension specialist or certified crop advisors for any additional pesticide resistance-management and/or IPM recommendations for specific crops and disease problems in your area.
For further information or to report suspected resistance, contact company representatives at