Magnum contains pyraclostrobin, a substance observed to promote plant growth; this is attributed to its stimulating effects on physiological processes, such as enhanced photosynthesis and reduced environmental and pathogenic stress.

Magnum contains pyraclostrobin, which is effective in controlling various fungal diseases, such as powdery mildew, rust, black spot, and fruit rot.

Magnum contains boscalid, a substance primarily used to control fungal diseases such as powdery mildew and gray mold.