Kresoxim-methyl is a fungicide from the strobilurin group with protective, curative, and eradicative activity. Due to its locally systemic (translaminar) properties, it is rapidly absorbed by plant tissues after application and provides effective control of fungal diseases. This fungicide has low toxicity to mammals (LD50 > 5000 mg/kg). According to the FRAC classification, kresoxim-methyl is categorized as a high resistance risk fungicide (Group 11).
Mode of Action
Kresoxim-methyl disrupts fungal cellular respiration by inhibiting electron transport in mitochondrial Complex III (bc1 complex). This prevents ATP production, thereby inhibiting spore germination, mycelial growth, and disease development.
Applications
In Iran, it is used for the control of:
Apple powdery mildew
Apple scab
Powdery mildew of cucurbits
In other countries, it is also used to control:
Apple and pear scab
Powdery mildew in vegetables
Rice blast
Rice sheath blight
Pre-Harvest Interval (PHI):
Apple: 30 days
Cucurbits: 4 days
Directions for Use
Apply at the early stages of disease development or as a preventive treatment.
Ensure thorough coverage of all aerial plant parts during spraying.
Repeat application at 10–14 day intervals if necessary.
To prevent resistance development, avoid consecutive applications and rotate with fungicides that have a different mode of action.

Crops

Diseases

Amount of use

Apple Trees

Powdery Mildew

160–200 g per 1000 L of water

Apple Trees

Apple Scab

160–200 g per 1000 L of water

Cucurbits

Powdery Mildew

200 g per 1000 L of water

Kresoxim-Methyl

Additional information