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Gramoxone herbicide injury to banana foliage (leaf spotting).

Vikane (termiticide) injury to Areca palm (leaf yellowing).

Copper fungicide toxicity on Chamedorea palm (leaf spotting).

The insecticide, diazinon, spray injury to a leaf of kava (Piper methysticum).

Phytotoxic response of banana (Musa sp.) to herbicde (glyphosate) spray.

Definition

Phytotoxic is harmful to plants (usually used to describe chemicals).

Discussion

Phytotoxic reactions and symptom development usually occur soon (within 1-3 days) after chemicals are applied. Herbicides are  intentionally phytotoxic.