Effect of Irrigation of Sulfur Solution before Sowing on Growth and Root Rot Disease of Seedling in Ginseng Nursery

Abstract

: To control the disease of root rot in ginseng nursery, inorganic sulfur solution of 0.1%, 1.0%, and 2.0% were irrigated by amount of 10 ℓ per 3.3 ㎡ before sowing. On the last ten days of July, Fusarium solani and F. oxysporum were similarly detected by 44.8% and 43.8%, respectively, while Cylindrocarpon destructans was low detected by 4.4% in the diseased seedling. The more sulfur's concentration was increased, the more soil pH was decreased. Soil pH was decreased from 5.87 to 4.59 by the irrigation of sulfur solution of 1.0%. The more sulfur's concentration was increased, the more electrical conductivity (EC) of soil was increased. EC was increased from 0.27 dS/m to 1.28 dS/m by the irrigation of sulfur solution of 1.0%. Irrigation of sulfur solution was effective on the inhibition of damping-off caused by Rhizoctonia solani in ginseng seedling. Control value for damping-off by the irrigation of sulfur solution of 1.0% and 2.0% were 75.7%, and 78.5%, respectively. Growth of leaf was inhibited by the irrigation of sulfur solution of 2.0%. Root weight per 3.3 ㎡ showed the peak in sulfur solution of 1.0%, while survived-root ratio and root weight per plant were decreased in the level of 2.0%. Survived-root ratio of seedling in sulfur solution of 1.0% was distinctly increased by 4.7 times compare to the control, but control value for root rot was relatively low as 49.2%. Mycelium growth of C. destructans, F. solani, and R. solani were distinctly inhibited by the increase of sulfur's concentration in vitro culture using PDA medium.

Suppression of Melanose Caused by Diaporthe citri on Citrus Leaves Pretreated with Bio-sulfur

“…Kim et al (2018) have shown that paper disk containing loess-sulfur on PDA medium has antifungal activities against Colletotrichum gloeosporioides known to cause anthracnose in jujube. Also, inorganic sulfur compound on PDA media added with an inorganic sulfur has a distinctive growth inhibition effect on Cylindrocarpon destructans and Fusarium solani known to cause root rot in ginseng plant (Lee et al, 2014b). Furthermore, mycelium growth of Fusarium oxysporum causing vascular wilts in various plants is decreased on PDA medium added with sulfur nanoparticles (Choudhury et al, 2011).…”