Letter Published: 22 March 1952 Fungicides and Phytotoxicity R. J. W. BYRDE & D. WOODCOCK Nature 169, 503–504 (1952) Cite this article ...

Jeffrey D. Weidenhamer, David C. Hartnett, John T. Romeo, Density-Dependent Phytotoxicity: Distinguishing Resource Competition and Allelopathic Interference in Plants ...

Flucarbazone-sodium, a new herbicide, exhibits high bioactivity at low concentrations. To elucidate potential carryover and crop injury, the behavior of flucarbazone in six Western Canadian soils was ...

The spots were evidence of phytotoxicity, meaning the trees had been exposed to a chemical of some sort. After some discussion with the owner, the actual cause of the problem became apparent.