The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Rainfastness of Two Fungicides Tank-mixed with Spreader-sticker

전착제를 혼용한 2 종 살균제의 내우성

  • Choi, Yun-Kyong (Seoul Pharma Laboratories, Inc.) ;
  • Yu, Ju-Hyun (Chemical Biotechnology Research Center, Research Institute of Chemical Technology)
  • Published : 2009.12.31
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Abstract

In order to elucidate the effect of spreader-stickers on the rainfastness of dithianon and chlorothalonil wettable powders, and to estimate the possibility of suggesting good new formulations, the fungicide residues on the leaf surface of hot pepper was assessed and compared after the drop-wise applications of fungicide suspensions containing spreader-sticker on leaf surface followed by artificial raining. Three commercial spreader-stickers, which were Cover, Reitron and Silwet, not only made the rainfastness of dithianon wettable powders worse on hot pepper leaf, but increasing their concentrations also accelerated it further. On the other hand, to chlorothalonil wettable powder, Reitron showed the 3-fold improvement of rainfastness. But, for the rest, there was no improvement as well. The effect of N-octylpyrrolidone (NOP) on rainfastness of both fungicides was excellent. Soybean oil formulations containing leaf-penetrable nonionic surfactant, which was either polyoxyethylene monotridecyl ether or polyoxyethylene monolauryl ether, improved dithianon rainfastness, but the ones containing conventional emulsifiers did not.

살균제 dithianon과 chlorothalonil 수화제 현탁액에 기존의 전착제와 콩기름을 주성분으로 하는 시험용 내우성 증진제를 각각 혼합하여 고추잎에 점적처리하고 인공강우를 이용하여 고추잎 표면에서 내우성을 측정함으로써 새로운 내우성 증진용 식물유 제제의 개발 가능성을 조사하였다. 카바액제 등 시판되고 있는 3종의 전착제는 dithianon 수화제의 내우성을 저하시켰으며, 전착제 농도가 증가할수록 그 저하효과는 더욱 현저하였다. 반면에 chlorothalonil 수화제에 대해서는 레이트론 만이 내우성을 약 3 배 증진하였으며, 다른 2 종의 전착제는 오히려 내우성을 저해하였다. 콩기름의 유화성 만을 고려하여 조제한 유화제를 함유하는 콩기름 유제는 dithianon 수화제의 내우성에 영향을 미치지 못하였으나, 식물 잎에 침투성인 비이온성 계면활성제로 polyoxyethylene monotridecyl ether 혹은 polyoxyethylene monolauryl ether를 콩기름용 유화제의 한 성분으로 첨가한 시험용 제제는 1.5배 이상의 내우성 증진 효과를 나타내어 새로운 제제의 개발 가능성을 확인할 수 있었다.

Keywords

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