한국농림기상학회지, 제 9권 제4호(2007) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 9, No. 4, (2007), pp. 228~233
DOI: 10.5532/KJAFM.2007.9.4.228
ⓒ Author(s) 2014. CC Attribution 3.0 License.


배과원에서 꼬마배나무이 월동성충의 수상 이동시기 예측 모형

김동순(1), 양창열(2), 전흥용(2)
(1)제주대학교 생명자원과학대학 생물산업부, 아열대농업생명과학연구소
(2)농촌진흥청 원예연구소 원예환경과

(2007년 08월 07일 접수; 2007년 11월 28일 수락)

An Empirical Model for the Prediction of the Onset of
Upward-Movement of Overwintered Caccopsylla pyricola
(Homoptera: Psyllidae) in Pear Orchards

Dong-Soon Kim(1), Chang-Yeol Yang(2), Heung-Yong Jeon(2)
(1)Faculty of Bioscience and Industry, College of Applied Life Science, Cheju Natl. Univ., Cheju 690-756,
Republic of Korea; The Research Institute for Subtropical Agriculture and Biotechnology
(2)Horticultural Environment Division of National Horticultural Research Institute, RDA, Suwon 441-440, Korea

(Received August 07, 2007; Accepted November 28, 2007)

ABSTRACT
Pear psylla, Caccopsylla pyricola (Homoptera: Psyllidae), is a serious insect pest in pear orchards. C. pyricola overwinters as adults under rough bark scales of pear trees. When the weather warms up in the spring, the overwintered adults become active, climb up to the tree branches, and inhabit on fruit twigs to lay eggs. This study was conducted to develop a forecasting model for the onset of upward-movement of overwintered C. pyricola adults to control them by timely spraying of petroleum oil. The adult population densities were observed under rough barks (B) and on fruit twigs (T) of pear trees. Relative upward-movement rates (R) were calculated as T/(B+T). Low threshold temperatures for the activation of overwintered C. pyricola adults were selected arbitrarily from 5 to 9oC at a 1oC interval. Then, the days (D) when daily maximum air temperatures were above each low threshold temperature were counted from 1 February until to the dates with R eggs 0.8. The same methods were applied for the prediction of the first observation of eggs. The variation of coefficients (CV) for the mean Des were lowest with the low threshold temperature of 6oC. At this selected threshold temperature, the upward movement of C. pyricola adults occurred with 12 D and they started laying eggs with 25 D. In the field validation, the model outputs with the 6oC threshold temperature reasonably well explained the observed data in Suwon and Cheonan in 2002. Practical usages of the model were also discussed.

Keyword: Caccopsylla pyricola, Pear pests, Forecasting model, Petroleum oil

MAIN

적요

꼬마배나무이(Caccopsylla pyricola)는 배나무의 주요한 해충으로 배나무의 거친 껍질 밑에서 성충상태로 월동하는 해충이다. 봄철 날씨가 따뜻해지면 월동성충은 활동을 시작하여 나무 가지로 이동하고 단과지에 알을 낳는다. 본 연구는 기계유유제를 이용한 꼬마배나무이 월동성충 적기 방제를 위하여 월동해충이 나무 위로 이동하는 시기를 예측하는 모형을 개발하고자 수행하였다. 봄철 배나무 거친 껍질 밑 및 수상 단과지에서 꼬마배나무이 월동성충 밀도를 조사하여, 성충의 상대적인 이동비율(단과지에서 상대적 발생비율)을 계산하였다. 임의로 5~9oC까지 1oC 간격으로 꼬마배나무이 월동성충 활동에 필요한 하한온도를 선정하고 2월 1일부터 일별 최고온도 자료를 이용하여 상대적 이동비율이 0.8 이상 되는 날까지 각 하한온도를 초과하는 누적일수를 계산하고 비교하였다. 또한 같은 방법으로 꼬마배나무이 월동성충이 낳은 알 초발생일까지 누적일수를 계산하였다. 그 결과 하한온도를 6으로 했을 때 각 예측일까지 누적일수의 평균에 대한 변이계수가 가장 낮았으며, 평균 누적일수가 12에 도달할 때 월동성충의 이동이 일어났고, 25일 때 산란이 관측되었다. 이 조건의 모형 매개변수를 이용하여 수원 및 천안 지역에서 포장적합결과 모형 예측결과는 실측 이동시기를 잘 표현하였다. 기타 실제 농가포장에서 꼬마배나무이 월동성충 이동시기 예측모형의 활용방안에 대하여 고찰하였다.

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