Role of Salicylic acid in stay green, growth and yield of two purposes maize hybrid

An experiment was conducted at Al- Hamidhia Research Fields, Faculty of Agriculture / Anbar University in North Ramadi city to study the levels salicylic acid 0, 200 and 400 mg. L-1 fifteen genotypes (5 inbred lines + 10 hybrids) maize. A randomized complete block design used a slit table arrangement; thus, main treatments are for spray, secondary tables (inbred hybrids). Three replications were made produce two-purpose hybrids (grain forage yield) by introducing some maize grown semi-co-breeding program. Results have shown dominance hybrid BK104× Zm6 giving highest product leaves staying green that reached 222.1g 8.9 leaves, successively spring season. In comparison, Inb-27× BK104 has dominated fall season, yield stay as 247.01g 9.45 successively. The reason these returned their with grains numbered row, grain weight concentration mg.L-1 both seasons, 179.10 177.33g didn't differ significantly from mg.L-1. interaction significant all traits, except trait 300 So, we recommend using dominant seasons. Keywords: AS, Inbred lines, Diallel crops, plant growth regulator, yield, weight.