SUPPRESSION OF RHIZOCTONIA-INDUCED SEEDLING BLIGHT OF PEANUTS WITH SPRAYS OF CHLORPYRIFOS AND IPRODIONE

Seedling blight of peanut (Archis hypogaea L.), caused by Rhizoctonia solani Kuhn, is an increasing problem. Associative factors that relate to this problem are substandard utilization of cultural and chemical controls. However, available land and chemicals limit the level of con trol for seedling blight. Two chemicals, chlorphrifos and iprodione, w hich are currently labeled on peanuts for other uses, were found to be directly suppressive to R. solani in culture. In tests in the field, both chemicals suppressed damage to plants and the number of plants wi th seedling blight when applied as a single, pre-emergent spray to the soil. In addition, iprodione suppressed progressive seedling blight w hen applied on a post-emergence basis.