Collapse of Mature Plants (unknown cause): This disease has been reported in the Rio Grande Valley. One of the symptoms is a sudden weakening of petioles that causes the leaves to droop close to the stem. The roots or stems of such plants often show a watery brown rot and the plants eventually die. The cause has not been determined, but fungi such as Rhizoctonia and Fusarium have been isolated from roots. The disease has been associated with waterlogged soil and poor soil drainage.

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