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Occurrence of Fusarium wilt and Twospotted Spider Mite under Plastic Mulched and Non-Plastic Mulched Bed in Hydroponic Culture of Strawberry

딸기 수경재배에서 베드 피복유무에 따른 시들음병과 점박이응애 발생 양상

  • Nam, Myeong Hyeon (Nonsan Strawberry Experiment Station, Fruit Vegetable Research Institute, Chungnam ARES) ;
  • Kim, Hyun Sok (Nonsan Strawberry Experiment Station, Fruit Vegetable Research Institute, Chungnam ARES) ;
  • Kim, Tae Il (Nonsan Strawberry Experiment Station, Fruit Vegetable Research Institute, Chungnam ARES) ;
  • Oh, Sang-Keun (Department of Applied Biology, Chungnam National University)
  • 남명현 (충남농업기술원과채연구소 논산딸기시험장) ;
  • 김현숙 (충남농업기술원과채연구소 논산딸기시험장) ;
  • 김태일 (충남농업기술원과채연구소 논산딸기시험장) ;
  • 오상근 (충남대학교 응응생물학과)
  • Received : 2018.09.21
  • Accepted : 2018.10.23
  • Published : 2018.12.31

Abstract

Hydroponic strawberry culture system is increasing annually. Most of strawberry farmers use mulched bed in hydroponic culture and strawberry plants were transplanted in early September. After transplanting, Fusarium wilt caused by Fusarium oxysporum f. sp. fragariae and twospotted spider mite (TSSM), Tetranychus urticae, can increase their occurrence under high temperature condition. Therefore, we conducted for comparison occurrence of Fusarium wilt and TSSM on mulched with green polyethylene film and non-mulched bed. Occurrence of Fusarium wilt on mulched bed was started from early October and more increase than non-mulched bed. Damage rate of TSSM on mulched bed was shown higher than non-mulched bed. Temperature of substrate in mulched bed increased than non-mulched bed, but relative humidity near plants was decreased. As a result, use of non-mulched bed should be effective for reducing of Fusarium wilt and TSSM on strawberry plants.

딸기 수경재배시스템은 국내에서 매년 증가추세에 있다. 대부분의 딸기농가는 수경재배에서 베드를 멀칭하여 9월 초순 딸기묘를 정식한다. Fusarium oxysporum f. sp. fragariae에 의한 시들음병과 점박이응애 Tetranychus urticae는 정식 후 높은 온도조건에서 발생이 증가하는 경향이 있다. 따라서 베드 녹색 polyethylene(PE)필름 멀칭과 무멀칭처리에서 시들음병과 점박이응애 발생을 비교하기 위해 시험을 실시하였다. 녹색 PE필름 멀칭처리에서 시들음병 발생은 10월 초순부터 시작되었고 무멀칭처리보다 더 증가하였다. 녹색 PE피름 멀칭 처리는 점박이응애의 피해율이 무멀칭처리보다 높았다. 녹색 PE필름 멀칭처리의 상토내 온도는 무멀칭처리보다 증가했지만 대기내 상대습도는 감소하였다. 이런 결과로 딸기 수경재배에서 베드의 무멀칭처리는 시들음병과 점박이응애 발생을 낮추는 효과가 있다고 판단된다.

Keywords

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Fig. 1. Mycelial growth (A) on PDA, and disease index and soil temperature (B) of two isolates of Fusarium oxysporum f. sp. fragariae at incu-bated at one of five constant temperatures. The error bars represent the standard error of the means.

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Fig. 2. Disease index of Fusarium wilt under green polyethylene film mulched and non-mulched bed in strawberry hydroponic culture during nursery season in 1st trial (A) and 2nd trial (B). The error bars represent the standard error of the means.

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Fig. 3. Severity of Fusarium wilt under green polyethylene film mulched and non-mulched bed in strawberry hydroponic culture during harvesting season in 1st trial (A) and 2nd trial (B). The error bars represent the standard error of the means.

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Fig. 4. Average temperature (A), average soil temperature (B), and relative humidity (C) under green polyethylene film mulched and nonmulched bed in strawberry hydroponic culture during harvesting season in 1st trial.

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Fig. 5. Average temperature (A), average soil temperature (B), and relative humidity (C) under green polyethylene film mulched and nonmulched bed in strawberry hydroponic culture during harvesting season in 2nd trial.

Table 1. Occurrence of two spotted spider mite under green polyethylene film mulched and non-mulched bed in strawberry hydroponic culture

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Table 2. First bud shoot and yield on green polyethylene film mulched and non-mulched bed in strawberry hydroponic culture

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