Drift and Distribution Properties of Pesticide Spray Solution Applied Aerially by manned-Helicopter

헬기를 이용한 항공살포 농약의 비산 및 분포 특성

  • Jin, Yong-Duk (Harzardous Substances Division, National Academy of Agricultural Science, RDA) ;
  • Lee, Hee-Dong (Pesticide Safety Division, National Academy of Agricultural Science, RDA) ;
  • Park, Yeon-Ki (Pesticide Safety Division, National Academy of Agricultural Science, RDA) ;
  • Kim, Jin-Bae (Harzardous Substances Division, National Academy of Agricultural Science, RDA) ;
  • Kwon, Oh-Kyung (Harzardous Substances Division, National Academy of Agricultural Science, RDA)
  • 진용덕 (국립농업과학원 농산물안전성부 유해물질과) ;
  • 이희동 (국립농업과학원 농산물안전성부 농약평가과) ;
  • 박연기 (국립농업과학원 농산물안전성부 농약평가과) ;
  • 김진배 (국립농업과학원 농산물안전성부 유해물질과) ;
  • 권오경 (국립농업과학원 농산물안전성부 유해물질과)
  • Published : 2008.12.31

Abstract

This study was carried out to assess adoptability and environment impacts of ultra low volume (ULV) pesticide spray solutions aerially sprayed by manned-helicopter. Uniformity of the deposited amount in paddy fields was uneven, showing $3.1{\sim}4.7$ times differences among surveyed sites. Drifting distance of aerially sprayed droplets from the target area was within 30 m in the wind direction and 20 m in the opposite direction. Most of the aerially sprayed pesticides were deposited in/on rice plants, while those in submerged paddy water and soil were relatively small. The degradation rate of the deposited pesticides was in the decreasing order of rice plants, paddy water and soil. Soil residues of pesticides in the aerially sprayed rice paddy fields after harvest ranged from non-detected to 0.201 mg/kg. However, no pesticides were detected in brown rice and rice straw. No phytotoxic symtoms were observed in rice plants and nearby non-target crops by the sprayed pesticides.

헬기에 의해 항공살포된 고농도 소량 살포농약의 비산 및 분포 특성과 이에 따른 벼와 주변작물에 미치는 영향을 평가하였다. 항공살포시 농약의 벼 부착량은 채취지점 및 약제에 따라 $3.1{\sim}4.7$배의 차이를 보여 살포 균일성은 낮았다. 헬리콥터에 의한 항공방제시 대상지역 이외의 포장으로 분무입자가 비산하는 정도는 바람부는 방향으로는 30 m, 바람부는 반대방향으로는 20 m 이내로 비교적 비산 정도가 낮았다. 살포된 농약은 대부분 벼에 부착되었고 논물 또는 토양 중에 낙하된 비율은 낮은 편이었으며, 재배환경 중 분해 속도는 벼> 물>토양 순이었다. 항공방제 포장의 벼 수확 후 토양 중살포농약의 잔류량은 불검출 ${\sim}0.201\;mg/kg$이었으며, 현미와 볏짚에서는 검출되지 않았다. 또한 항공살포에 의한 벼와 주변작물에 대한 약해반응은 무시할 수준이었다.

Keywords

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