Cantaloupe Diseases

Anthracnose

Anthracnose lesions on muskmelon Figure 1. Anthracnose lesions on muskmelon fruit appear sunken while lesions on nearby leaves appear jagged.
Anthracnose lesions on muskmelon Figure 2. Anthracnose lesions on muskmelon fruit.
anthracnose Figure 3. Advanced lesions of anthracnose on muskmelon fruit. Note cracked appearance.
Anthracnose lesions on muskmelon Figure 4. Close-up of anthracnose lesions on muskmelon leaves.
Anthracnose lesions on muskmelon Figure 5. Lesions of anthracnose on muskmelon leaves.

Alternaria Leaf Blight

Alternaria Leaf Blight disease Figure 1. Alternaria leaf blight on cantaloupe leaf. Note large, mostly circular lesions with concentric rings.
Leaf Blight disease Figure 2. Image of several cantaloupe leaves with Alternaria leaf blight lesions.
Alternaria Leaf Blight disease Figure 3. Close-up of a leaf with Alternaria leaf blight. Note concentric ring structure of lesions.
Alternaria Leaf Blight disease Figure 4. Image of a leaf with lesions of Alternaria leaf blight just beginning to coalesce. Note chlorotic halos.
Alternaria Leaf Blight disease Figure 5. A close-up of an individual lesion of Alternaria leaf blight.
Alternaria Leaf Blight disease Figure 6. Cantaloupe fruit exposed to possible sunburn due to Alternaria leaf blight.

Bacterial Wilt

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.
Bacterial wilt Figure 2. Cucumber beetles have eaten this cantaloupe leaf. If insect frass enters the eaten area, bacterial wilt may result.
Bacterial wilt Figure 3. Quick field test for possible bacterial wilt. Stringy, viscous sap may indicate presence of E. tracheiphila, causal pathogen of bacterial wilt.
Bacterial wilt Figure 4. General wilt of cantaloupe caused by bacterial wilt.

Fusarium fruit rot

Fusarium fruit rot of Cantaloupe Figure 1. Fusarium fruit rot of cantaloupe.
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.
Fusarium fruit rot of cantaloupe. Figure 3. Fusarium fruit rot of cantaloupe.

Gummy stem blight

Gummy stem blight Figure 1. Gummy stem blight lesion on the hypocotyl of a cantaloupe transplant. Note presence of dark pycnidia.
gummy stem blight Figure 2. Gummy stem blight lesion on cotyledon of cantaloupe transplant. Note pycnidia.
gummy stem blight Figure 3. The gummy stem blight fungus has completely colonized this cantaloupe transplant.
gummy stem blight Figure 4. Gummy stem blight on multiple cantaloupe seedlings in a transplant tray.
gummy stem blight Figure 5. Gummy stem blight lesion on cantaloupe leaf. Note dark pycnidia in lesion and chlorotic margin of lesion.
gummy stem blight Figure 6. Gummy stem blight of cantaloupe.
gummy stem blight Figure 7. Gummy stem blight lesion on cantaloupe fruit.
gummy stem blight Figure 8. Cross section of cantaloupe with gummy stem blight lesion (black rot).
gummy stem blight Figure 9. Crown of cantaloupe plant with necrosis caused by gummy stem blight. Note pycnidia.

Phytophthora blight

Phytophthora blight Figure 1. Phytophthora blight of cantaloupe. Note collapsed vines.
Phytophthora blight Figure 2. Phytophthora blight of cantaloupe. Note collapsed vine.
Phytophthora blight of cantaloupe Figure 3. Phytophthora blight of cantaloupe. Note rotten and necrotic area at collar.
Phytophthora blight of cantaloupe. Figure 4. Phytophthora blight of cantaloupe. Note lesion on stem.
Phytophthora blight of cantaloupe. Figure 5. Phytophthora blight of cantaloupe. Note sporulation on fruit.