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Seasonal Development and Control of Parthenolecanium corni in Blueberry Shrubs

블루베리에 발생하는 말채나무공깍지벌레의 계절적 발육과 방제

  • Lee, Seok-Min (Environmental Agriculture Division, Gyeongsangnam-do Agricultural Research & Extension Services) ;
  • Chung, Bu-Keun (Environmental Agriculture Division, Gyeongsangnam-do Agricultural Research & Extension Services) ;
  • Kang, Dong-Wan (Environmental Agriculture Division, Gyeongsangnam-do Agricultural Research & Extension Services) ;
  • Park, Kyung-Mi (Environmental Agriculture Division, Gyeongsangnam-do Agricultural Research & Extension Services) ;
  • Han, In-Young (Environmental Agriculture Division, Gyeongsangnam-do Agricultural Research & Extension Services) ;
  • Kwon, Jin-Hyeuk (Environmental Agriculture Division, Gyeongsangnam-do Agricultural Research & Extension Services) ;
  • Lee, Heung-Su (Environmental Agriculture Division, Gyeongsangnam-do Agricultural Research & Extension Services)
  • 이석민 (경상남도농업기술원 환경농업연구과) ;
  • 정부근 (경상남도농업기술원 환경농업연구과) ;
  • 강동완 (경상남도농업기술원 환경농업연구과) ;
  • 박경미 (경상남도농업기술원 환경농업연구과) ;
  • 한인영 (경상남도농업기술원 환경농업연구과) ;
  • 권진혁 (경상남도농업기술원 환경농업연구과) ;
  • 이흥수 (경상남도농업기술원 환경농업연구과)
  • Received : 2021.08.20
  • Accepted : 2021.11.11
  • Published : 2021.12.01

Abstract

Seasonal development of Parthenolecanium corni was observed from 4 Jun. 2019 (nymph) - 25 Jun. 2020 (1st Gen. nymph) in blueberry shrub in Sacheon city, Gyeongsangnam-do. To investigate their development, more than 5 twigs sprouted in 2018 were taken from the farm nearly weekly basis. The development of each scale were examined under the stereomicroscope and chemical control was conducted in the blueberry shrub with available three insecticides. The results on the development period and Centigrade Degree-Days accumulation (DDC) obtained are as follows: egg-laying period (peak): 12 -26 May 2020 (24 May)(DDC, 110.0-188.5 (173.6)); egg-hatching period (peak): 9 - 23 June 2020 (19 June)(DDC, 325.2-480.8(435.6); egg period: 26 days; nymph movement from overwintered adult to new leaves 16-25 June 2020 (DDC, 410,5-500.4); nymph movement from leaf to twig (peak) to become adult: 4-18 Feb. 2020 (8 Feb.). Eggs no. /adult (range): 956.8 ± 73.4 (13 - 3497). Size (mm) of egg, 0.29 ± 0.020(L), 0.15 ± 0.013(W); of egg-hatched nymph, 0.35 ± 0.018(L), 0.18 ± 0.007(W), 0.09 ± 0.007(eye distance); and of adult, 4.30 ± 0.893(L), 2.64 ± 0.520(W). The egg-hatched nymphs from the overwintered adult moved to the backside leaf of new shoot in which they found about 95% until leaf is falling by early February in next year. They overwintered as 2nd instar and occurred univoltine. For the control of the 1st instar crawler, three insecticides treated on 16 and 30 July at the registered dose for Ceroplastes japonicus. Acetamiprid 8WP showed 96.9% mortality at 21 days after 1st treatment.

말채나무공깍지벌레의 계절적 발육을 2019년 6월 4일(약충) 부터 2020년 6월 25일까지(1세대 약충) 경상남도 사천시 소재의 블루베리 과원에서 관찰하였다. 본 충의 발육을 연구하기 위해서 2018년 눈에서 발아한 5개 이상의 잔가지를 1주 간격으로 농가에서 채취하였다. 깍지벌레의 발육은 실체현미경 하에서 조사하였고 화학적 방제는 시중에서 이용할 수 있는 3종의 살충제로 블루베리 과원에서 수행하였다. 발육기간과 유효적산온도(Centigrade Degree-Days accumulation, DDC)에 대한 결과는 다음과 같다. 산란기간(최성기): 2020년 5월 12 -26일(DDC, 110.0-188.5(173.6)); 부화기간(최성기): 2020년 6월 9 - 23(19)일)(DDC, 325.2-480.8(435.6); 난기간: 26 일; 월동성충으로부터 약충의 신엽으로 이동: 2020년 6월 16-25 일(DDC, 410,5 - 500.4); 성충으로 발육하기 위한 잎에서 잔가지로 이동(최성기): 2020년 2월 4 -18(8)일. 성충 한마리 당 산란수(범위): 956.8 ± 73.4 (13 - 3497); 알의 크기(mm): 0.29 ± 0.020(L), 0.15 ± 0.013(W); 부화약충의 크기: 0.35 ± 0.018(L), 0.18 ± 0.007(W), 0.09 ± 0.007(눈 간격); 성충크기: 4.30 ± 0.893(L), 2.64 ± 0.520(W). 월동성충으로부터 부화한 약충은 신초의 잎 뒷면에서 다음해 2월 초순 잎이 떨어질 때까지 약 95%가 발견되었다. 이들은 2령충으로 월동하고 1년에 한 세대를 경과하였다. 기어다니는 1령충을 방제하기 위하여 3종의 살충제를 7월 16일과 30일에 거북밀깍지벌레에 등록된 농도로 처리하였다. 아세타미프리드수화제가 1회 처리 21일 후에 96.9%의 사충율을 나타내었다.

Keywords

Acknowledgement

본 연구가 수행될 수 있도록 블루베리 포장을 제공한 장영길·이채자 농업인에게 사의를 표한다.

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