Disease resistant screening for Northern corn leaf blight
1995
Tharmmasak Sommartya | Prachoom Jutawantana | Udom Pupipat (Kasetsart Univ., Bangkok (Thailand). Inseechandrastitya Inst. of Crops Research and Development. National Corn and Sorghum Research Center Inst.)
Prensently, the increasing importance of the Northern-Corn Leaf Blight (NCLB) is documented. An attempt to demonstrate the inoculum potential and inoculum effectiveness of Helminthosporium turcicum was conducted. The experimental results could positively and beneficialy, enhance the screening for disease resistance of NCLB program. Medium compositions, inoculum concentration, plant age and inoculation technique were included in this experiment. The best medium to support maximum sporulation was steriled seeds of Higari sorghum (20*10*[5) conidia/ml). The effective inoculum concentration was 1*10*[5) conidia/ml at all plant ages. Dropping an inoculum directly into the seedling leafwhole was the best way of inoculation and the appropriate plant age that susceptible to NCLB and produced high number of diseased leaves (14.9 leaves) was day 28.
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