Suppression of germ-tube abnormalities in Helminthosporium turcicum by blue light

Abstract

Conidia of Helminthosporium turcicum Pass, trapped on water agar below diseased sweet corn seedlings were germinated under different conditions of illumination and their development was studied after 10 h of incubation. Variations in light intensity and quality affected neither the ability of conidia to germinate nor total germ-tube length. However, blue light of low intensity protected the fungus against germ-tube abnormalities as did daylight of higher light intensity.