diseases of watermelon

Diseases of watermelon ( Citrullus lanatus ) in Arizona

Fungi & fungal-like organisms: Gummy stem blight; Monosporascus vine decline; Powdery mildew; Pythium root rot

Virus: Squash leaf curl virus

Nematode

Root-knot nematode

Plant Disease Identification | Extension Plant Pathology

August 3, 2011

http://cals.arizona.edu/PLP/plpext/diseases/vegetables/watermelon/watermelon.html