Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Effects of Biocontrol Agents on Weed Control, Abundance of Aquatic Animals and Insects, and Yield in Paddy Rice Fields

생물자원의 논 잡초 생물학적 방제 효과와 그에 따른 수서동물과 곤충 종수 및 벼 수량 변화

  • Hyo Jung Choi (Division of Climate Change Response, R&D Breau, Jeollabuk-do Agricultural Research and Extension Services) ;
  • Sang Young Seo (Division of Climate Change Response, R&D Breau, Jeollabuk-do Agricultural Research and Extension Services) ;
  • Seon U Choi (Division of Climate Change Response, R&D Breau, Jeollabuk-do Agricultural Research and Extension Services) ;
  • Chang Kyu Lee (Division of Climate Change Response, R&D Breau, Jeollabuk-do Agricultural Research and Extension Services) ;
  • Mi Jeong Uhm (Division of Climate Change Response, R&D Breau, Jeollabuk-do Agricultural Research and Extension Services) ;
  • Ju Hee Kim (Division of Climate Change Response, R&D Breau, Jeollabuk-do Agricultural Research and Extension Services) ;
  • Min Sil An (Division of Agriculture Food Devlopment, R&D Breau, Jeollabuk-do Agricultural Research and Extension Services) ;
  • Woo Jung Choi (Department of Rural and Biosystems Engineering, College of Agriculture and Life Sciences, Chonnam National University)
  • 최효정 (전라북도농업기술원 연구개발국 농업환경과) ;
  • 서상영 (전라북도농업기술원 연구개발국 농업환경과) ;
  • 최선우 (전라북도농업기술원 연구개발국 농업환경과) ;
  • 이창규 (전라북도농업기술원 연구개발국 농업환경과) ;
  • 엄미정 (전라북도농업기술원 연구개발국 농업환경과) ;
  • 김주희 (전라북도농업기술원 연구개발국 농업환경과) ;
  • 안민실 (전라북도농업기술원 연구개발국 작물식품과) ;
  • 최우정 (전남대학교 농업생명과학대학 지역.바이오시스템공학과)
  • Received : 2023.03.10
  • Accepted : 2023.03.26
  • Published : 2023.03.31
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Abstract

Golden apple snails (Pomacea canaliculat) (GAS) are widely used for weed control in rice cultivation. However, concerns on the ecological risk of invasive GAS species are increasing. This study aimed to evaluate the overall impacts of GAS on weed control, abundance of aquatic animals and insects, and rice yield, in comparison with that from other biocontrol agents such as loach (Misgurnus mizolepis) and catfish (Silurus asotus), which are alternatives for biological weed control in rice paddy cultivation. Field experiments included five treatments; control, herbicide, GAS, loach, and catfish. During the rice growth, weed appearance and biological abundance were monitored, and at harvest, the rice yield was determined. Weed control efficiency was the highest for GAS treatment (100%), followed by that for herbicide (95.8%), loach (57.5%), and catfish treatments (31.7%). Insect abundance was considerably decreased in GAS treatment due to heavy weed removal, which affects the habitat of aquatic animals and insects. The amount of rice yield (unit: kg 10 a-1) was in the order of GAS (798.9) > loach (708.1) = herbicide (700.7) > catfish (629.4) > control (496.0). Therefore, considering the weed control efficiency, biological abudance, and rice yield, loach could be a potential alternative for biological weed control in organic rice farming. However, the activity of the biocontrol agents are susceptible to environmental conditions; therefore, further studies under different conditions are essential to confirm these findings.

Keywords

Acknowledgement

This study was carried out with the support of "Research Program for Agricultural Science & Technology Development (Project No. PJ01560403)", National Institute of Agricultural Sciences, Rural Development Administration, Republic of Korea.

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