Abstract
Symptoms of 2,6-dichlorobenzonitrile poisoning in plants are described and compared with the symptoms produced by phenylboronic acid and boron deficiency. The effects on the macroscopic and microscopic appearance of plants and on their ability to translocate growth regulators are so alike that it is thought that both 2,6-dichlorobenzonitrile and boron deficiency affect the same basic process.

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