doi: 10.5660/WTS.2023.12.3.281 Citation BibTeX RIS Mendeley

Potential Effect of Organic Fertilizer Turf Spice (838) on Thatch Degradation and Control of Large Patch Disease in Zoysiagrass (Zoysia japonica)

유기질비료 Turf Spice(838)의 대취 분해력 및 한국들잔디 갈색퍼짐병 방제 효과

• 이긍주태현숙, 장공만, 김영선, 김남희

The use of effective anti-microbes has been suggested as an alternative method to control large patch disease among some sustainable management tools. The decomposition of zoysiagrass thatch and the suppression effect on the disease recurrence were investigated in the fairway infected with the large patch pathogen after applying Turf spice (838), the antagonistic action of the isolated bacteria from Turf spice (838) against a Rhizoctonia solani AG2-2 (IV) pathogen causing the large patch disease, and the suppression effect. In the paring culture, the Bacisllus subtilis T2 contained in Turf spice (838) showed a clean zone distance of 1.93 ± 0.46 cm, which was statistically not different from 1.83 ± 0.51 cm when used the registered microbial pesticide Zenotan containing B. subtilis KBC1010, indicating that both appeared to inhibit the mycelial growth of R. solani AG2-2 (IV). After mixing the dried zoysiagrass clippings with Turf spice (838) at 50 g m-2, the decomposition rate for 90 days was 31.8%, which was 1.7 times higher than that of the chemical fertilizer treatment. In the results of treating the fairway of Dream Park CC (Incheon, Korea), holes applied with Turf spice (838) at 40 g m-2 rate averaged the areas of large patch by half, compared to holes treated with a conventional organic fertilizer showing infection areas of 6,045 m2 . Although multi-year or regional replications are needed, the current data revealed the potential effect of Turf spice (838) as a functional organic fertilizer for boosting zoysia growth and large patch control.