Correlation Between Rust Disease Severity and Structural and Biochemical Resistance of Five Maize Varieties

Rust disease in corn is a limiting factor in corn cultivation. The severity of this disease can reach 40% with a fairly high yield loss rate. Planting resistant varieties is one of the important ways of management. The purpose of the study was to correlate the severity of rust disease with structural and biochemical resistance in five varieties of maize plants. The research method consists of several stages, namely corn planting, pathogen inoculation, seeding observation, and maintenance. The observations included disease severity at 7 weeks after inoculation, number of stomata, number of trichomes, salicylic acid content, and phenolic compound content. The results showed that the severity of 7 MSIs was positively correlated with the number of trichomes, salicylic acid content, and phenolic compound content, but negatively correlated with the number of stomata.