Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Effect of Day Length and Temperature on the Diapause Termination of Riptortus pedestris (Hemiptera: Alydidae) Male Adults

일장과 온도 처리가 톱다리개미허리노린재 수컷 성충의 휴면종료에 미치는 영향

  • Huh, Wan (College of Agriculture/Institute of Agriculture and Life Sciences (BK2I Program), Gyeongsang National University) ;
  • Park, Chung-Gyoo (Central Research Institute Kyung Nong Corporation)
  • 허완 (경상대학교 농업생명과학연구원 (BK21 Program)) ;
  • 박정규 ((주)경농 중앙연구소)
  • Received : 2010.07.08
  • Accepted : 2010.09.07
  • Published : 2010.09.30
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Abstract

The bean bug, Riptortus pedestris (=clavatus) Fabricius (Hemiptera: Alydidae) is a serious pest of soybean in many countries. It enters a reproductive diapause in the winter by short day length (<13.5 h.) in Korea and Japan. The combined effects of temperatures ($25^{\circ}C$ and $8^{\circ}C$) and day lengths (10L:14D and 14L:10D) upon the termination of the male's diapause were studied. The combinations are (1) HTLD = $25^{\circ}C$, 14L:10D treatment for 1, 2, 3 weeks and 30 days; (2) HTSD = $25^{\circ}C$, 10L:14D treatment for 1, 2, and 3 weeks; (3) LTLD$\rightarrow$HTLD = $8^{\circ}C$, 14L:10D treatment for 1, 2, and 3 weeks followed by HTLD treatment; (4) LTSD$\rightarrow$HTLD = $8^{\circ}C$, 10L:14D treatment for 1, 2, and 3 weeks followed by HTLD. The amount of aggregation pheromone components secreted was adopted as the criteria for diapause termination in males. Males did not secrete aggregation pheromone under HTSD conditions. However, the males treated with HTLD for more than 21 days secreted significantly higher amounts of aggregation components, (E)-2-hexenyl (Z)-3-hexenoate and (E)-2-hexenyl (E)-2-hexenoate, compared to the control or HTSD treatments. The three components of the aggregation pheromone were secreted by the 14%, 29%, and 100% males treated with HTLD for 7 days, respectively. However more than 83% of the HTLD-treated males secreted all three components by the $30^{th}$ day under the treatment. In comparison, the pheromone amounts secreted by the males treated with LTLD$\rightarrow$HTLD or LTSD$\rightarrow$HTLD were equal or less than those secreted by males with continuous HTLD treatment.

톱다리개미허리노린재, Riptortus pedestris (=clavatus) Fabricius (Hemiptera: Alydidae)는 성충으로 월동휴면을 한다. 전형적인 장일형 곤충으로 일장 시간이 약 13.5시간 이하의 단일조건에서 휴면이 유기된다. 2006년 10월과 11월에 월동중인 수컷 성충을 채집하여 휴면종료에 미치는 온도와 일장 조합의 효과를 조사하였다. 즉, (1) HTLD = $25^{\circ}C$, 14L:10D에 1, 2, 3주 및 30일 처리, (2) HTSD = $25^{\circ}C$, 10L:14D에 1, 2, 3주 처리, (3) LTLD$\rightarrow$HTLD = $8^{\circ}C$, 14L:10D에 1, 2, 3주 처리 후 HTLD 처리, (4) LTSD$\rightarrow$HTLD = $8^{\circ}C$, 10L:14D에 1, 2, 3주 처리 후 HTLD 처리의 네 가지 조합으로 처리하였다. 수컷의 집합페로몬 분비 여부로 휴면종료 여부를 판단하였다. HTSD 조건에서는 페로몬을 분비하지 않았다. 그러나 HTLD 조건에 21일 이상 처리된 수컷은 무처리나 HTSD 처리 수컷에 비해 많은 량의 페로몬을 분비하였다. 고온장일 처리 7일부터 집합페로몬 성분인 E2HZ3H, E2HE2H 및 TI를 분비한 개체의 비율이 각각 14%, 29%, 100%에서 30일째에는 83%의 개체가 세 성분 모두를 분비하였다. 저온처리 없이 단순히 고온장일 조건에서 사육한 것들이 저온처리(LTLD$\rightarrow$HTLD 또는 LTSD$\rightarrow$HTLD)를 받은 것보다 페로몬을 분비하는 개체의 비율이 높았다.

Keywords

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