Article | 12. 2015 Vol. 33, Issue. 6
Correlation between Air Temperature Factors and Leafing Date of Mulberry Tree

Department of Horticulture Industry, Wonkwang University1
Institute of Life Science and Natural Resources, Wonkwang University2

2015.12. 807:811


This study was conducted to identify the air temperature factors that affect leafing date of mulberry (Morus alba) in Buan, Jeonbuk province. Over the period from 2009 to 2014, the leafing date averaged April 24 (114 Julian days). The earliest leafing date was April 12, in 2014, and the latest leafing date was May 2, in 2011. Yearly variations of daily mean temperature (DMT) and daily maximum temperature (DMxT) were high in the last part of March. There were highly negative correlations between leafing date and degree days of accumulated DMT above 0, 5, and 10°C in the period from March 1 to April 10. Linear regression equations for estimating the leafing date were y = 153.8 - 0.1886 x (r2 = 0.965**) and y = 126.2 - 0.2246 x (r2 = 0.825*) for the degree days of accumulated DMT above 5°C in the period from March 1 to April 10 and the last part of March, respectively. Therefore, leafing date of mulberry, which is important for popcorn disease control, is 96.5% predicted by degree days of accumulated DMT above 5°C in the periods from March 1 to April 10.

1. Han, J.H., I.C. Son, I.M. Choi, S.H. Kim, J.G. Cho, S.K. Yun, H.C. Kim, and T.C. Kim. 2011. Predicting harvest date of ‘Niitaka’ pear by using full bloom date and growing season weather. Korean J. Hortic. Sci. Technol. 29:549-554.  

2. Han, J.H., I.C. Son, I.M. Choi, S.H. Kim, J.G. Cho, S.K. Yun, H.C. Kim, and T.C. Kim. 2013. Relationship between yearly fruit growth and climatic factors in ‘Niitaka’ pear. Korean J. Hortic. Sci. Technol. 31:8-13.  

3. Hong, S.K., W.G. Kim, and G.B. Sung. 2007a. Aspects of popcorn disease occurrence on mulberry fruits in Korea. Res. Plant Dis. 13:131-136.  

4. Hong, S.K., W.G. Kim, G.B. Sung, and S.H. Nam. 2007b. Identifi-cation and distribution of two fungal species causing sclerotial disease on mulberry fruits in Korea. Mycobiology 35:87-90.  

5. Intergovernmental Panel on Climate Change (IPCC). 2007. Climate change 2007 (The physical science basis), Summary for policy-makers, technical summary and frequently asked questions WMO & UNEP, p. 142.  

6. Jeon, K.S., H.C. Kim, H.J. Bae, K.S. Bae, and T.C. Kim. 2011. Frost damage of mulberry tree according to topographic characteristics in Buan province. J. Bio-Envrion. Control 20:45-49.  

7. Kim, H.C., T.O. Kwon, J.H. Bae, and T.C. Kim. 2012. Shoot growth characteristics and climatic factors in greenhouse cultivation of mulberry. J. Bio-Envrion. Control 21:74-78.  

8. Kim, H.B., C.K. Kang, K.B. Sung, S.W. Kang, and J.R. Lee. 2007. Anti-oxidative capacity of mulberry leaf and its tea. Korean J. Seric. Sci. 49:18-23.  

9. Kim, T.W., Y.B. Kwon, J.H. Lee, I.S. Yang, J.K. Youm, H.S. Lee, and J.Y. Moon. 1996. A study on the antidiabetic effect of mulberry fruits. Korean J. Seric. Sci. 38:100-107.  

10. Korea Meterological Administration (KMA). 2014. Weather infor-mation. URL :  

11. Lee, H.W., D.H. Shin, and W.C. Lee. 1998. Morphological and characteristics of mulberry (Morus) fruit with variates. Korean J. Seric. Sci. 40:1-7.  

12. Lee, S.H., Y.S. Kwon, I.J. Kim, T.J. Kim, H.H. Kim, and D.I. Kim. 2012. Correlation analysis between meteorological condition and ‘Fuji’ apple fruit characteristics in Chungbuk, Korea. Korean J. Intl. Agric. 24:51-59.  

13. Ministry of Agriculture, Food and Rural Affairs (MAFRA). 2012. Statistics. main&site=20130902_144723&pagenum=0&category=0&page= 0&search=&mem=.  

14. National Institute of Meteorological Research (NIMR). 2007. The application of regional climate change scenario for the national climate change report (III), p. 131.