• 한국기계가공학회지
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• 제19권8호
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• pp.15-21
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• 2020

We improved the sound pressure of the speaker and allowed the speaker to rotate 360 degrees to improve the effectiveness of the acoustic type bird repellent system. The prototype of the bird repellent system was developed by evaluating sound pressure characteristics by distance and direction and installing orchards. As a result of the evaluation, the extermination sound pressure increased from a distance of about 30 m to a maximum of 60 m, and through the rotary speaker, the extermination distance could be widened in all directions without specific direction.

• 농촌계획
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• 제26권1호
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• pp.89-99
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• 2020

This study was conducted as a basic research to create a sound and vital ecological environment in the city compared to the appearance characteristics of Gap stream(G-stream), which are the main stream of Banseok stream(B-stream), by analyzing the characteristics of waterbirds, including Wild Spot-billed Duck (S-Duck), that live in B-stream built as ecological stream. The waterbird survey was conducted by the line census for 3.2km, Jukdong-bridge to Jamiseon-bridge, from January to August 2018. The analysis of the survey was conducted with Relative species density(RD) of the emerging waterbird species, the Species diversity and Density Per Unit area for 100㎡(DPU). The waterbird survey results of B-stream was conducted 65 times. The five types of water birds that appeared during the survey were Spot-billed Duck(Anas poecilorhyncha), Teal(Anas crecca), Little Egret(Egretta garzetta), Great Egret(Egretta alba), and Grey Heron(Ardea cinerea). As a result, for S-Duck at B-stream, RD was 89.9%, monthly species diversity was simple as 0.3801 in January, 0.5943 in February and 0.3501 in August. The DPU of the S-Duck was 0.165/100㎡ in the B-Stream survey section which was 4.9 times higher than the main stream section, G-stream. The non-freezing zone of the city's small stream is expected to play an important role as a winter stop for wild birds such as S-Duck during the freezing period of the huge stream. For this reason, considering the ecological characteristics of wild waterbirds such as S-Duck when creating ecological stream, a: space and linear selection of waterways which can minimize the impact of natural enemy and increasing the number of walkers, b: management water-friendly plants in the low flow channel, c: arrangement walking-bicycle road will be necessary.

• 아시안잔디학회지
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• 제18권4호
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• pp.193-200
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• 2004

곤충병원성선충 Steinernema carpocapsae 포천 계통을 이용하여 미국흰불나방 (Hyphanria cunea)의 환경친화적 방제 가능성을 알아보기 위하여 실내와 포트에서 실험을 수행하였다. Steinernema carpocapsae 포천 계통의 병원성은 미국흰불나방의 령기에 따라 병원성의 차이가 있어 2령충과 $3\~4$령 혼재 처리에서는 미국흰불나방 유충 당 20마리 이상 선충 처리에서는 $100\%$치사하였으나, 5령충에서는 80마리 선충 접종 시에도 처리 3일 후 $34\%$의 치사율을 보였다. Steinernema carpocapsae 포천 계통의 접종농도가 높을수록 미국흰불나방의 치사율은 증가하였다. Pot 실험에서 수종 (뽕나무와 버즘나무)간이나 선충 농도간에 미국횐불나방 유충에 대한 치사율은 차이가 없어 $70\%$ 이상의 치사율을 보였다.