| 보문 : 토양 pH 조절과 윤작에 의한 감자 더뎅이병 방제 |
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김점순 ( Jeom Soon Kim ) , 이영규 ( Young Gyu Lee ) , 권민 ( Min Kwon ) , 김주일 ( Ju Il Kim ) , 이계준 ( Gye Jun Lee ) , 이정태 ( Jeong Tae Lee ) , 류종수 ( Jong Soo Ryu ) |
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| Control of Common Scab of Potato Caused by Streptomyces spp. by Soil pH Adjustment and Crop Rotation |
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Jeom-Soon Kim*, Young-Gyu Lee, Min Kwon, Ju-Il Kim, Gye-Jun Lee, Jeong-Tae Lee and Jong-Soo Ryu |
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Highland Agriculture Research Center, National Institute of Crop Science, Rural Development Administration (RDA), Pyeongchang 232-955, Korea |
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Received: November 03, 2011 Revised: April 09, 2012 Accepted: April 13, 2012 |
| Abstract |
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In 2006, the effect of soil pH adjustment on control of common scab of potato caused by Streptomyces spp. was evaluated in the field. Soil with an original pH 5.7 was treated with sulfur of 42 kg/10a and calcium hydroxide of 81.6 kg/10a and 184.5 kg/10a to adjust pH 5.0, 6.0 and 6.5, respectively. Additionally, the effect of gypsum (522 kg/10a) on soil pH and disease severity was examined. The soil pH of sulfur treatment plot was continuously declined from 5.13 at tuber initiation time to 5.01 at harvest. The disease severity of sulfur treatment plot was relatively low (22.8%) and the marketable yield of that was high (90.5%). By contrast, the soil pHs treated with calcium hydroxide (81.6 kg/10a and 184.5 kg/10a) were increased (pH 6.06 and 6.49, respectively) at harvest. In addition, calcium hydroxide treatment plots showed higher disease severities (51.0% and 61.1%), and lower marketable yields (55.7% and 37.0%). Meanwhile, the soil pH of gypsum treatment plot was not changed until harvest, and the disease severity and the marketable yield were not significantly different from those of control. The effect of crop rotation was also evaluated with four crops such as welsh onion, soybean, corn and Chinese cabbage. These crops were planted in the infested field from 2005 to 2007, and potatoes were planted in the same field in 2008. The disease severities of potatoes produced after rotations with welsh onion, soybean, corn and Chinese cabbage for 3 years were 13.1%, 16.7%, 28.9% and 30.2%, respectively. However, the disease severity of 73.1% was shown in continuous cropping of potato for 3 years. In addition, similar effects were exhibited in the marketable yield. These results demonstrate that the adjustment of soil pH and crop rotation might be very useful tools to control common scab of potato. |
| Key Words:
Common scab, Crop rotation, Cultural control, Soil pH |
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