Gallery

Melanose on grapefruit leaf. Mature lesions/pustules are reddish-brown and raised.

Star melanose on grapefruit leaf.

Star melanose on grapefruit leaf.

Star melanose on grapefruit leaf.

Star melanose on grapefruit leaf.

Leaf chlorosis caused by zinc deficiency (most often on young foliage).

Leaf chlorosis caused by magnesium deficiency.

Raised veins and discoloration on leaf caused by boron deficiency.

Whole-leaf chlorosis caused by nitrogen deficiency.

Clementine mandarin tree killed by Phytophthora citrophthora.

Gummosis on the branch of a Clementine tangerine.

Gummosis and branch canker on Clementine mandarin tree.

Tree symptom - trees of Clementine tangerine killed by Phytophthora trunk and branch cankers.

Foot rot gummosis on tree.

Extensive Phytophthora foot rot lesion showing bark death and tissue callusing on a tree.

Phytophthora foot rot of sweet orange tree showing bark necrosis, light gumming, and callusing.

Sweet orange tree more than half girdled by a Phytophthora lesion at the base of the tree.

Trunk and branch canker on lemon showing gummosis and bark death on a tree.

Yellow vein symptoms associated with girdling of a young tree by Phytophthora foot rot.

Orange fruit with brown rot lesion.

Sporulation lesions of P. angolensis on lower surface of a leaf.

Leaf spots caused by P. angolensis on Marsh Seedless grapefruit.

Lesions on orange fruit.

Spots on fruit.

Raised tumor-like growths on young orange fruit.

P. angolensis on fruit (oranges).

Sunken, necrotic lesions of P. angolensis on fruit (oranges).

Ring-shaped chlorotic patterns on psorosis-infected fruit.

Psorosis lesions on leaf.

Psorosis symptoms on leaf.

Leaf symptoms - naturally spread psorosis on foliage (Citrus ringspot).