Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Injury of Full Seed Stage Soybeans by The Bean Bug, Riptortus pedestris

콩 종실비대성기에 톱다리개미허리노린재 가해에 의한 피해 해석

  • Received : 2010.10.25
  • Accepted : 2010.12.15
  • Published : 2010.12.30
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Abstract

Soybean seed injury was analyzed in the experiments in which the bean bug, Riptortus pedestris(Hemiptera: Alydidae), was released into screen-caged pots containing full seed stage(R6) of soybean. When the different stages of insects, from the 3rd instar nymphs to adults, were released into pots during 8 days in soybean R6 stage, soybean seeds with injury marks (B-type seeds) increased. The weight reduction ratio in B-type seeds was highest in the injury by the 5th instar nymphs, while the daily-produced number ratio of B-type seeds was small in the treatment. In the injury by the different number of adult released into pots, 4, 8, 16 adults caused a significant increase of B-type seeds, while 16 adults caused the significant increase of the deformed (C-type) seeds. In the injury by the different release period of adults, the total number of pods was not significantly different among treatments, while the total seed number harvested was significantly small in the release for 48 days. The release for 8 and 16 days caused a significant increase of B-type seeds, while the release for 48 days caused the increase of C-type seeds. The results indicated that injury of soybean R6 stage by the bean bug produced soybean seeds with distinct injury marks at relatively low density and during short term attack period, while it produced deformed seeds at high density and during long attack period.

콩 종실비대성기에서 톱다리개미허리노린재(노린재목: 호리허리노린재과)에 의한 콩 피해 정도를 파악하고자 망사로 씌운 콩 포트에 실험곤충을 접종하여 수확기에 피해를 조사하였다. 콩 종실비대성기에 실험곤충 2령부터 성충까지 접종하였을 때, 수확된 종자 수와 기형종자(C형)의 비율은 대조구이에 비해 차이가 없었으나, 2령을 제외한 다른 모든 발육태들은 흡즙 흔적이 있는 종자(B형)를 많이 생성하였다. B형 종자 생성 수는 2령과 5령 약층에서 적었으나, B형종자의 무게감소율은 5령 약층에 의한 피해에서 가장 컸다. 성충 수를 증가시켜 접종하였을 때, 수확된 종자수는 대조구에 비해 차이가 없었으나, B형 종자의 생성비는 4, 8, 16마리 접종구에서 유의하게 컸으며, C형종자 비율은 16마리 접종구에서만 대조구에 비해 컸다. 곤충 접종기간을 달리하였을 때는 전체 꼬투리 수는 대조구와 차이가 없었으나 수확된 종자 수는 실험곤충을 수확기까지 방치한(48일) 처리구에서 현저하게 적었다. 이중 B형종자 비율은 8일과 16일간 접종된 것들이 대조구에 비해 유의하게 높았고, C형종자 비율은 수확기까지는 장기간 실험곤충을 방치한 처리에서 그 값이 대조구에 비해 높았다. 결과적으로 종실비대성기의 피해는 흡즙흔이 있는 종자들 주로 생성하면서, 곤충 밀도와 가해 기간이 어느 한계 이상으로 증가할 때 기형종자가 생성되고 때로는 종자들이 탈락하는 것으로 추정되었다. 피해입률은 곤충 수와 접종기간 각각에 대해 정의 상관관계로 증가하는 것을 보였다.

Keywords

References

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  1. Effects of temperature on the development, fecundity, and life table parameters of Riptortus pedestris (Hemiptera: Alydidae) pp.1347-605X, 2018, https://doi.org/10.1007/s13355-018-0593-5