Leafless branches, yellowing leaves, and sparse foliage on a navel orange tree with Phytophthora gummosis, caused by <I>Phytophthora citrophthora.</I>.
Leafless branches, yellowing leaves, and sparse foliage on a navel orange tree with Phytophthora gummosis, caused by Phytophthora citrophthora..
Credit: David Rosen