재식밀도와 멀칭재료에 따른 절화 국화의 생육과 흰녹병 발생

Cut Flower Growth and White Rust Occurrence by Planting Density and Mulching Materials in Cut Chrysanthemum

This study was carried out to examine the effects of planting density and mulching materials on cut flower growth and white rust occurrence in chrysanthemum ‘Baekma’ and ‘Orange ND’. In standard chrysanthemum ‘Baekma’, the cut flower length, stem diameter, No. of leaves, fresh weight of cut flower, and flower diameter were more effective in 6 rows planting than in 8 or 10 rows planting. The occurrence rate of white rust was lowest to 48.9% in 6 rows planting. In spray chrysanthemum ‘Orange ND’, the cut flower growth, such as stem diameter, No. of leaves, fresh weight of cut flower, and flower diameter was better in 6 rows planting than in 8 or 10 rows planting. The occurrence rate of white rust was lowest to 28.9% in 6 rows planting. The cut flower growth of standard chrysanthemum ‘Baekma’ increased in PE film mulching compared with non-mulching. But, the cut flower growth was not different significantly by PE film color. The occurrence rate of white rust was highest to 93.9% in non-mulching, and was lower to 42.2~60.0% in green or black PE film mulching. Also, the No. of infected leaves per plant and No. of lesions per leaf were least in green or black PE film mulching. In spray chrysanthemum ‘Orange ND’, the cut flower length was longest in transparent or green PE film mulching, and stem diameter, No. of leaves, flower diameter, and No. of flower was not different in mulching treatments. The occurrence rate, No. of infected leaves per plant, and No. of lesions per leaf of white rust was lowest in black PE film mulching.