Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
권호 표지

The Relationship between the Density of the Small Brown Planthopper and the Rice Stripe Virus Disease in Rice Cultivation System

재배양식에 따른 벼 줄무늬잎마름병 전염원인 애멸구의 밀도

  • 이두구 (농촌진흥청 작물과학원 호남농업연구소) ;
  • 심형권 (농촌진흥청 작물과학원 호남농업연구소) ;
  • 박종철 (농촌진흥청 작물과학원 호남농업연구소) ;
  • 최만영 (농촌진흥청 작물과학원 호남농업연구소) ;
  • 강미형 (전북농업기술원 남원고냉지화훼시험장) ;
  • 김재덕 (농촌진흥청 작물과학원 호남농업연구소) ;
  • 박진우 (농촌진흥청 농업과학기술원) ;
  • 노태환 (농촌진흥청 작물과학원 호남농업연구소)
  • Published : 2006.08.30
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Abstract

In double cropping fields, there has been a risk of increase rice stripe viral disease outbreaking as the vector, small brown planthopper that overwinter in barley fields increases. Especially rice cultivation in Honam region has two types of cropping system such as rice only cropping in a season and double cropping both of rice and barley. In double cropping system, harvesting of barley could induce migration of the vector from barley to rice field. We found that the vector's density was different in rice fields by distance from barley field. The vector's density in rice field was highest 63 numbers within one meter from the neighbor barley field, and the numbers reduced greatly as the distance from barley field increases. The disease incidence according to rice cultivation methods was different, Donjin 1 was appeared to be a susceptible variety showing 2.4% and 2.5% of disease incidence in direct and transplanting cultivation, respectively. The small brown planthopper in a nearby rice field reach peak 3 days after the barley field was harvested.

보리 재배면적 증가로 인하여 월동한 애멸구 밀도증가가 벼 줄무늬잎마름병의 대면적 발생 위험이 상존하고 있다. 특히 호남지역은 보리재배 논과 1모작 이앙 또는 직파재배 논이 혼재하고 있어 보리 수확과 동시에 보독충인 애멸구는 벼가 자라고 있는 논으로 대규모 이동하여 병 발생을 조장하고 있다. 재배양식에 따른 줄무늬잎마름병 발생양상은 1모작 이앙과 담수직파 재배에서 병발생이 각각 2.5, 2.4%로 이모작 이앙 1.3%보다 높았다. 보리재배 논과의 2m 이내의 거리에서 보리 수확 3일전 애멸구 밀도는 5마리에서 수확 3일후 63마리로 급격하게 증가하였다. 또한 보리재배 논과 거리가 멀어짐에 따라서 애멸구 밀도는 크게 감소하였다.

Keywords

References

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