cantaloupe diseases
Alternaria Leaf Blight
Figure 1. Alternaria leaf blight on cantaloupe leaf. Note large, mostly circular lesions with concentric rings. 
Figure 2. Image of several cantaloupe leaves with Alternaria leaf blight lesions. 
Figure 3. Close-up of a leaf with Alternaria leaf blight. Note concentric ring structure of lesions. 
Figure 4. Image of a leaf with lesions of Alternaria leaf blight just beginning to coalesce. Note chlorotic halos. 
Figure 5. A close-up of an individual lesion of Alternaria leaf blight. 
Figure 6. Cantaloupe fruit exposed to possible sunburn due to Alternaria leaf blight. Angular leaf spot
Figure 1. Angular leaf spot of cantaloupe. Note necrotic lesions, primarily marginal, on a large proportion of the seedlings. 
Figure 2. Angular leaf spot of cantaloupe. Note water-soaked necrotic lesions, primarily marginal. 
Figure 3. Angular leaf spot of cantaloupe. Note irregular, necrotic lesions. 
Figure 4. Angular leaf spot of cantaloupe. 
Figure 5. Angular leaf spot of cantaloupe. Note marginal lesions, perhaps infecting hydathodes. Anthracnose
Figure 1. Anthracnose lesions on cantaloupe fruit appear sunken while lesions on nearby leaves appear jagged. 
Figure 2. Anthracnose lesions on cantaloupe fruit. 
Figure 3. Advanced lesions of anthracnose on cantaloupe fruit. Note cracked appearance. 
Figure 4. Close-up of anthracnose lesions on cantaloupe leaves. 
Figure 5. Lesions of anthracnose on cantaloupe leaves. Bacterial Wilt
Figure 1. The wilted and collapsed area on the margin of this leaf is due to bacterial wilt of cantaloupe. Note also the areas of the leaf eaten by cucumber beetles. 
Figure 2. Cucumber beetle feeding can be observed on this cantaloupe leaf. If insect frass enters the area that has been fed upon, bacterial wilt may result. 
Figure 3. Quick field test for possible bacterial wilt. Stringy, viscous sap may indicate presence of Erwinia tracheiphila, causal pathogen of bacterial wilt. 
Figure 4. General wilt of cantaloupe caused by bacterial wilt. Fusarium fruit rot
Figure 1. Fusarium fruit rot of cantaloupe. 
Figure 2. Fusarium fruit rot of cantaloupe. Note lesion has started in suture area. Varieties with deep sutures seem relatively more susceptible to this disease. 
Figure 3. Fusarium fruit rot of cantaloupe. Gummy stem blight
Figure 1. Gummy stem blight lesion on the hypocotyl of a cantaloupe transplant. Note presence of dark pycnidia. 
Figure 2. Gummy stem blight lesion on cotyledon of cantaloupe transplant. Note pycnidia. 
Figure 3. The gummy stem blight fungus has completely colonized this cantaloupe transplant. 
Figure 4. Gummy stem blight on multiple cantaloupe seedlings in a transplant tray. 
Figure 5. Gummy stem blight lesion on cantaloupe leaf. Note dark pycnidia in lesion and chlorotic margin of lesion. 
Figure 6. Gummy stem blight of cantaloupe. 
Figure 7. Gummy stem blight lesion on cantaloupe fruit. 
Figure 8. Cross section of cantaloupe with gummy stem blight lesion (black rot). 
Figure 9. Crown of cantaloupe plant with necrosis caused by gummy stem blight. Note pycnidia. Magnesium deficiency of Cantaloupe
Figure 1. Magnesium deficiency of cantaloupe. 
Figure 2. Magnesium deficiency of cantaloupe. 
Figure 3. Magnesium deficiency of cantaloupe. 
Figure 4. Magnesium deficiency of cantaloupe. Manganese toxicity of Cantaloupe
Figure 1. Manganese toxicity of cantaloupe. Symptoms usually cluster together in a field where soil pH is low. 
Figure 2. Manganese toxicity of cantaloupe. 
Figure 3. Manganese toxicity in cantaloupe. Phytophthora blight
Figure 1. Phytophthora blight of cantaloupe. Note collapsed vines. 
Figure 2. Phytophthora blight of cantaloupe. Note collapsed vine. 
Figure 3. Phytophthora blight of cantaloupe. Note rotten and necrotic area at collar. 
Figure 4. Phytophthora blight of cantaloupe. Note lesion on stem. 
Figure 5. Phytophthora blight of cantaloupe. Note sporulation on fruit. Powdery mildew
Figure 1. Colonies of powdery mildew are visible on the upper surface of this cantaloupe leaf. 
Figure 2. Sporulation of the powdery mildew fungus is visible on the lower surface of a cantaloupe leaf. Root knot nematode of Cantaloupe
Figure 1. Root knot nematode of cantaloupe. Note wilt of affected plants. 
Figure 2. Root knot nematode of cantaloupe. Note wilt of affected plants. 
Figure 3. Root knot nematode of cantaloupe. Note wilt of affected plants is on hill. 
Figure 4. Root knot nematode of cantaloupe. Note galls on roots. 
Figure 5. Root knot nematode of cantaloupe. Affected roots with galls is held up against background of wilted plants.