It is a mitochondrial respiration inhibitor, which works by blocking electron transfer during cytochrome synthesis. It has protective, therapeutic, and leaf penetration conduction effects. Field efficacy trials of pyraclostrobin emulsifiable concentrate have shown good control effects against downy mildew, banana black sigatoka, leaf spot, and sclerotinia diseases. The application rate for controlling downy mildew is 75–150 g/ha of active ingredient (equivalent to 20–40 mL/667 m2 of the commercial emulsifiable concentrate). After dilution with water, apply evenly by spray at the early stage of the disease. Generally, spray 3–4 times at intervals of 7 days. For controlling banana black sigatoka and leaf spot, the effective concentration of the active ingredient is 83.3–250 mg/kg (diluted 1000–3000 times). Start spraying at the early stage of the disease, generally applying 3 times at intervals of 10 days. The number of sprays depends on the severity of the disease. It is safe for cucumbers and bananas, with no phytotoxicity observed.