Abstract Fruit of muskmelon (Cucumis melo L.) were treated with 0–104 mg/liter of the fungicides: benomyl (methyl-1-[butylcarbamoyl]-2-benzimidazole carbamate); etaconazole (l-{[2-(2,4-dichlorophenyl)-4-ethyl-1,3-dioxolan-2-yl]-methyl}-1 H-1,2,4-triazole); fenapanil (1-butyl-1-phenyl-1 H-imidazole-1-propanenitrile); imazalil (1-[2-allyloxyl-2-(2,4-dichlorophenyl)ethyl]imidazole); and prochloraz (l-{N-propyl-N-[2-(2,4,6-trich-lorophenoxy) ethyl]}carbamoyliinidazole). Damage from Fusarium rots, Geotrichum and Rhizopus soft rots, and Alternaria surface blemish was assessed. Fenapanil, imazalil, and prochloraz had the most useful range of fungicidal activities. Prochloraz was the most efficacious fungicide tested, expressed as disease control per unit concentration of active ingredient.