A Survey of the Nonvolatile Organic Acids in Seedlings of Some Grasses and Legumes.

Root inhibition was also employed as an additional biological assay using cucumber seeds (variety i'vIarketer) as the test material. Seeds were germinated at room temperature (approximately 250 C) under laboratory conditions of alternatingf light and darkness on filter paper impregnated with a 0.005 -M solution of the compounds in Petri dishes. Four days after treatment the length of the primary roots was measured (table II), and root length was used as an index of growth inhibition. The roots that appeared from treated seeds were without root hairs. As was the case in the previous experiment, the chlorine substituted benzimidazoles were the most active.