과수화상병 방제를 위해 수간주입한 스트렙토마이신의 잔류특성 = Residue Characteristics of Trunk-Injected Streptomycin Used to Control Fire Blight

국문 초록 (Abstract)

화상병은 도입 금지 병원균으로써 과수 전체를 고사시키는 등 치명적인 영향을 광범위하게 끼치며 발병시 완전박멸과 치료가 사실상 불가능하다. 따라서 농가에 경제적정신적 손실을 초래하기 때문에 이를 보완하기 위해 더욱 효과적인 약제 개발을 위해 본 연구를 진행하였다. 기존에 경엽처리로 등록되어 꾸준히 사용되고 있는 농약들 중 병원균 제어에 효과적인 streptomycin을 대상약제로 선정한 후 살포방법을 보다 직접적으로 영향을 미치는 방법으로 변경하여 사과나무 및 배나무에 개화직전 수간주사 처리하였다. 시간경과 및 나무의 높이에 따라 시료를 채취하여 전처리 방법 및 기기분석법을 확립하였다. 이후 나무의 생리적 특성과 주입물질의 물리화학적 특성 및 확립된 잔류분석을 통한 결과를 토대로 이동성과 지속성을 판단하였을 때 사과나무 및 배나무에서 모두 양호하였다. 이를 토대로 약효의 발현 시점을 화상병의 생활환에 비교추정하여 약제처리 후 10일 이내인 만개시점보다 30일 이후 신초로 확산되는 과정에 더욱 뛰어날것으로 판단하였다. 허나, 제한적인 실험 방법으로 정확한 결과를 도출하기 어려워 streptomycin의 화상병 억제농도 규명 및 약효 발현 시점 등 추가적인 연구를 통해 더욱 효과적인 약제 개발의 필요성이 있다.

다국어 초록 (Multilingual Abstract)

Fire blight is a prohibited plant pathogen with a wide range of fatal effects, including withering of the entire tree. Once a fire blight break-out occurs, it is virtually impossible to treat and completely eradicate . Fire blight causes significant economic and psychological damage to farms. Therefore, this study was conducted to develop more effective pesticide treatments by supplementing the pesticides that have been previously used . Among the registered pesticides used continuously for foliar treatment, streptomycin (1%) SL, an effective treatment for controlling pathogens, was selected as the target pesticide. The spraying method was changed to truck injection, a more direct application method, and the apple and pear trees were injected right before flowering. Samples were collected and the methods of pretreatment and instrumental analysis were established according to the elapsed time and the height of the tree. Then, mobility and sustainability factors were judged based on the physiological characteristics of the tree, the physicochemical properties of the injected pesticide, and established residual analysis results The results for both apple and pear trees were positive. Based on this, the onset time of the drugʼs efficacy was compared with the life cycle of fire blight. It was determined that the treatment would be more effective in the process of spreading to new shoots 30 to 50 days after the initial pesticide injection than within 10 days of full bloom. However, there is a need for more research and effective development as it is difficult to derive accurate results with limited experimental methods.

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