Resistance Identification of Maize Hybrid to Head Smut Disease

Taking the method of artificial inoculation,the resistance of 920 maize hybrids to head smut were identified and evaluated.The result showed that 1.3% maize hybrids were highly resistant,10.1% maize hybrids were resistant,12.6% maize hybrids were moderately resistant,62% maize hybrids were susceptible and 20% maize hybrids were highly susceptible.Test of maize hybrid in different areas and types showed that 37.8% later-maturing maize hybrids and 23.3% succulence maize hybrids,18.5% early-maturing maize hybrids,17.5% summer-planting maize hybrids and 16.7% special-early-maturing maize hybrid,8.6% waxy maize hybrids and 5.4% sweet maize hybrids were moderately-highly resistant.Among 160 authorized maize hybrids,there were 4 highly resistant,11 resistant and 19 moderately resistant.