The most important is the rootknot nematode, which is not readily noticed by the average person. Root-knot nematodes, Meloidogyne sp., are microscopic, soil inhabiting worms which attack the plant's root system. These galls are easily seen if root samples are observed. Nematode problems may go unnoticed for several years. As a heavy population builds up, the tree loses vigor and declines gradually.
Nematodes contribute to premature fruit drop.
Fig rust is an important fungus disease that attacks the leaves of figs. It is caused by Physopella fici. Fig rust first appears as small, yellowish-orange spots on the leaves. These enlarge slightly and may become very numerous as the season progresses. Rust causes complete defoliation of many trees in the state each year, resulting in ragged-looking trees.