소금 및 열수 처리에 따른 토양 내 딸기뿌리썩이선충 방제 효과
Efficacy of salt and hot water treatment on the Pratylenchus penetrans in soil
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본 연구에서는 고위험 식물기생선충이 관엽식물을 재배하는 농장 및 화원에서 발견될 경우에 대비하여, 토양 내 소금 및 열수 처리가 방제 효과가 있는지를 평가하고자 실험을 수행하였다. 식물기생선충의 밀도는 20, 40 kg m-2 소금 처리 시 100% 감소하였고, 5, 10 kg m-2 처리에서는 각각 95%, 99.8%의 감소가 관찰되었다. 열수 (96°C) 처리에서는 초기 밀도 대비 97.6%의 식물기생선충 감소가 확인되었다. 소금 처리는 무처리 토양에 비해 pH를 감소시키고 EC를 증가시키는 경향을 보였으나, 유기물 함량, 유효 인산, 총 질소 비율, 치환성 양이온 등의 다른 특성은 대조군과 유의한 차이가 없었다. 열수 처리의 경우, 모든 특성에서 무처리군과 차이가 없었다. 본 연구 결과, 도시 또는 도시 근교에 위치한 꽃집 및 온실에서 고위험 식물기생선충이 발견될 때, 20 kg m-2 이상의 소금과 96°C 이상의 열수를 2회 이상 처리하면 효과적으로 선충을 방제할 수 있을 것으로 판단된다.
Abstract
We have performed an experiment to evaluate the efficacy of salt and hot water treatments in soil for managing situations where high-risk plant-parasitic nematodes (PPNs) are detected in farms and flower shops that cultivate foliage plants. The density of Pratylenchus penetrans was reduced by 100% with salt treatments of 20 and 40 kg m-2, while decreases of 95% and 99.8% were observed with treatments of 5 and 10 kg m-2, respectively. In the hot water treatment, Pratylenchus penetrans decreased by 97.6% compared to the initial density. The salt treatment resulted in a decrease in pH and an increase in electrical conductivity (EC) compared to untreated soil. However, other characteristics, including organic matter content, available phosphorus, total nitrogen (T-N) rate, and exchangeable cations, did not differ from the control. In the case of hot water treatment, all properties were similar to those in the untreated group. As a result of this study, salt applications of more than 20 kg m-2 and hot water at 96°C could serve as effective control methods when high-risk PPNs are detected in flower shops and greenhouses located in urban or near-urban areas.
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