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Mature cantaloupe leaf covered in a white mass of conidiophores and conidia of Sphaerotheca fuliginea. Newly formed and young leaves are rarely infected by the fungus.
Dr. Christopher R. Little
Department of Biology, The University of Texas - Pan American, Edinburg, TX 78541-2999.
crlittle@panam.edu
Host: Cuminis melo reticulata (cantaloupe)
Disease name: Powdery mildew
Pathogen name: Sphaerotheca fuliginea
Sphaerotheca fuliginea can spread rapidly through a closely spaced garden or glasshouse planting of cantaloupes, cucumbers, or summer squash as the conidia are windborne. The disease may lead to enhanced nutrient deficiency symptoms and poor fruit development if severe. Weekly treatments of foliage with a chlorothalonil-containing fungicide can be effective in controlling this disease.
APS publication number: IW000047
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