The behaviour of some native and foreign maize hybrids to the attack of pests and pathogenic agents, under conditions of chemically treated seed

Abstract

The paper presents the results of experimental studies conducted in 2003 at the Agricultural Research and Development Station of Podu-Iloaiei, Iaşi County, on the behaviour of some native and foreign maize hybrids, to the attack of pathogenic agents and pests, under conditions of using untreated and chemically treated seed. A good resistance to the attack of pathogenic agents was found in hybrids Turda 198 and Turda 200, with a very good sprouting (F=93%) and a good resistance to the attack of pests. From the foreign maize hybrids with treated seeds, the Pelican hybrid has shown a good sprouting and a high resistance to the attack of diseases and pests. The comparative analysis of the behaviour of native and foreign maize hybrids to the attack of pests and pathogenic agents has shown a better sprouting (80.75%) in the 10 native hybrids, compared to the eight foreign hybrids (68.62%), an efficiency of seed treatment with higher values in native hybrids, and the diminution of the pest and pathogen attack (Gibberella fujikuroi, Sorosporium holci-sorghi, Ustilago maydis, Agriotes spp.,and Ostrinia nubilalis).