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Aphid Over-wintering Host Plants and Seasonal Transmission Rates of Potato Leafroll Virus by Aphids in the Highland Fields of Korea

고랭지 감자밭의 진딧물 월동기주 및 감자잎말림바이러스(PLRV) 보독진딧물의 시기별 변동

  • Kwon, Min (Highland Agricultural Research Institute, National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Juil (Highland Agricultural Research Institute, National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Changseok (Highland Agricultural Research Institute, National Institute of Crop Science, Rural Development Administration) ;
  • Lee, Yeonggyu (Highland Agricultural Research Institute, National Institute of Crop Science, Rural Development Administration)
  • 권민 (농촌진흥청 국립식량과학원 고령지농업연구소) ;
  • 김주일 (농촌진흥청 국립식량과학원 고령지농업연구소) ;
  • 김창석 (농촌진흥청 국립식량과학원 고령지농업연구소) ;
  • 이영규 (농촌진흥청 국립식량과학원 고령지농업연구소)
  • Received : 2018.10.28
  • Accepted : 2018.11.29
  • Published : 2018.12.01

Abstract

Aphid is a typical vector that transfers various kinds of viruses to potatoes. Therefore, it is very important to control aphids moving into potato fields. We investigated the seasonal movement pattern of aphids and its virus transmission rates mainly in the three seed potato production regions at highland in Gangwon-do, Korea. In addition, we identified the aphid species with over-wintering eggs collected from barks or twigs of total 57 tree species around potato fields in winter season. The peak time of summer and winter migration of aphid was at the mid-June and the early October, respectively. A 2.8% of total aphid trapped in yellow water-pan trap was turned out PLRV-borne, and the virus transmission rate was 15.4% by Myzus persicae and 9.1% by Macrosiphum euphorbiae. PLRV-borne aphids started to flow in from the late May, and virus transmission rate of aphid trapped in mid-June was the highest with 10.4%. Totally 14 species of aphid eggs wintered in the 17 species of trees including Acer pictum subsp. mono and Acer pseudosieboldianum at the 11 sites. In particular, because it is not certain that Betula platyphylla var. japonica and Yamatocallis hirayamae do transmit potato virus, but they over-wintered in host plants distributed over a wide area, further research on transmission ability is necessary.

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Fig. 1. Collection sites of aphid egg from the bark or twigs of trees growing along main roads in Gangwon-do, 2017. Each site included 1-8 sampling locations that were spaced 1-3 km apart.

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Fig. 2. Seasonal fluctuation of migratory aphid at three highland regions in Gangwon-do Province. Surveyed aphids using a yellow water-pan trap in 2017.

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Fig. 3. Fluctuation of migratory aphids and virus infection rate at Daegwallyeong highland region during late April to late June in 2018. Aphids trapped were inoculated on the young leaves of P. floridana and PLRV detected by ELISA.

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Fig. 4. PLRV transmission rates (%) by aphid species migrated to Daegwallyeong area in 2018.

Table 1. List of 57 plants and 11 sites to collect aphid egg over-wintered in the bark or twigs

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Table 1. Continued

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Table 2. Aphid species over-wintered in the host plants growing along main roads near potato fields at several regions in Gangwon-do. Aphid eggs were identified with MtCO1-based molecular identification

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Acknowledgement

Grant : 고랭지 비래진딧물 변동에 따른 감자 바이러스 매개 영향평가 및 관리기술 개발

Supported by : 농촌진흥청

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