Study on the techniques of diagnosing and controlling corn seedling diseases.
The techniques of diagnosing and controlling maize seedling diseases were studied in the fields and greenhouses in China by artificial inoculation and marked plant investigation. The results showed that maize seedling diseases could be divided into infective and non-infective diseases. The infective diseases were caused by Fusarium graminearum [Gibberella zeae], F. moniliforme [Gibberella moniliformis], F. moniliforme var. subglutinans [Gibberella fujikuroi var. subglutinans], Helminthosporium carbonum [Cochliobolus carbonum], Rhizoctonia solani, Sporisorium reilianum [Sphacelotheca reiliana] and Pseudomonas zeae. Non-infective diseases included symptoms influenced by nutrition deficiency, environment and chemical burn. Maize seedling diseases and head smut can be controlled by seed coating with thiram, triadimenol or tebuconazole and carbofuran.