1) Agricultural chemical 
Phytotoxicity is a toxic effect by a compound on plant growth. Such damage may be caused by a wide variety of compounds, including trace metals, pesticides, salinity, phytotoxins or allelopathy. ==Substances with phytotoxic potential== ===Mineral salts=== High concentrations of mineral salts in solution within the growing medium can have phytotoxi...
Being poisonous to plants. ... (09 Oct 1997) ...