Article | 10. 2016 Vol. 34, Issue. 5
Applications of Organic Fungicides Reduce Photosynthesis and Fruit Quality of Apple Trees



Department of Horticultural Science, Kyungpook National University1
Apple Research Institute, Kyungpook National University2




2016.10. 708:718


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Two different pest control programs were applied on 8-year-old ‘Ryoka’/M.26 apple trees (Malus domestica Borkh.). Lime sulfur or Bordeaux mixture with emulsified oil were applied 12 times from late March to mid-September as organic treatment, and synthetic chemicals were 7 times applied as control treatment. Over the entire apple-growing season, photosynthesis rates of apple trees were significantly lower in the organic treatment than in the control, and this photosynthetic differences were larger in July and August. Photosynthesis-related parameters such as stomatal conductance and transpiration behaved similarly to photosynthesis. The leaf area in the organic treatment was significantly smaller (24.7 cm2) than that in the control treatment (30.7 cm2). Organic leaves contained significantly less Chl. a (15.5 mg·g-1) than did control leaves (17.6 mg·g-1). Fruit yield per tree was significantly lower in the organic treatment (18.8 kg) than in the control (24.5 kg), because organic fruits experienced a higher rate of disease infection such as white rot (Botryosphaeria dothidae) and bitter rot (Glomerella cingulata ) than did control fruits. Organic fruits had high flesh firmness but less color development (lower Hunter’s a values). In this experiment, the pest control program with frequent applications of organic fungicides showed negative effects on photosynthesis and disease infection on leaves and fruits, and thus reduce the fruit quality and yield in ‘Ryoka’/M.26 apple trees.



1. Arnon DI (1949) Copper enzyme in isolated chloroplast: polyphenoloxidase in Beta vulgaris. Plant Physiol. 24:1-15. doi:10.1104/pp.24.1.1  

2. Artney MC, Walker SJ (2004) Current situation and future challenge facing the production and marketing of organic fruit in Oceania. Acta Hortic 638:387-396.  

3. Baudoin A, McDonald SF, Wolf TK (2006) Factor affecting reductions in photosynthesis caused by applying horticultural oil to grapevine leaves. J. Hortic Sci. 41:346-351.  

4. Beresford RM, Elmer PAG, Spink M, Alexander RT, Daly MJ (1991) Fungicides and control of black spots and powdery mildew in organic apple production systems. Proc. 44th New Zealand Weed Pest Contr. Conf., Wellington, p. 86-90.  

5. Choi KH, Lee DH, Song YN, Lee SW (2010) Current status on the occurrence and management of disease, insect, and mite pests in the non-chemical or organic cultured apple orchards in Korea. Kor. J. Org. Agr. 18:221-232.  

6. DeEll JR, Prange RK (1993) Postharvest physiological disorders, diseases, and mineral concentrations of organically and conventionally grown ‘McIntosh’ and ‘Cortland’ apples. Can. J. Plant Sci. 27:223-230. doi:10.4141/cjps93-036  

7. Ellis BW, Bradley FW (1992) The organic gardener’s handbook of natural insect and disease control. Rodale Garden Books, Emmaus, PA, USA. p. 534.   

8. Ellis MA, Madden LV, Wilson LL (1991) Evaluation of organic and conventional fungicides programs for control of apple scab, sooty blotch, and fly speck, 1990. Fungic. Nematicide Tests 46:10.  

9. Ferree DC (1979) Influence of pesticides on photosynthesis of crop plants, p. 331-341. In: R. Marcelle, H. Clijsters, and M. Van Poucke (eds.). Photosynthesis and plant development. Hague, The Netherlands. doi: 10.1007/978-94-009-9625-0_30  

10. Ferree DC, Hall FR, Krause CR, Roberts BR, Brazee RD (1999) Influence of pesticides and water stress on photosynthesis and transpiration of apple. Res. Circ., Ohio Agr. Res. Dev. Ctr. 299:34-46.  

11. Hamilton JM (1931) Studies of Fungicidal action of certain dust and sprays in the control of apple scab. Phytopathology 21:445-523.   

12. Hamilton JM, Keitt GW (1928) Certain fungicides in the control of apple scab. Phytopathology 18:146-147.   

13. Holb IJ, De-Jong PF, Heijne B (2003) Efficacy and phytotoxicity of lime sulfur in organic apple production. Ann. Appl. Biol. 142:225-233. doi:10.1111/j.1744-7348.2003.tb00245.x  

14. Korea Meteorological Administration (2012) Annual and monthly metrological report. http://www.kma.go.kr.  

15. McArtney S, Palmer JW, Adams HM (1996) Crop loading studies with ‘Royal Gala’ and ‘Braeburn’ apples; effect of time and level of hand thinning. New Zealand J. Crop Hort. Sci. 24:401-407. doi:10.1080/01140671.1996.9513977  

16. National Agricultural Products Quality Management Service (NAQS) http:// www.naqs.go.kr.   

17. Neel PL, Harris RW (1971) Motion-induced inhibition of elongation and induction of dormancy in Liquidamber. Science 173:58-59. doi:org/10.1126/science.173.3991.58  

18. Orbovis V, Achor D, Syvertsen JP (2007) Adjuvants affect penetration of copper through isolated cuticles of citrus leaves and fruit. HortScience 42:1405-1408.  

19. Palmer JW, Davies SB, Shaw P, Wunsche JN (2003) Growth and fruit quality of ‘Braeburn’ apple trees as influenced by fungicide program suitable for organic production. New Zealand J. Crop Hort. Sci. 31:169-177. doi:10.1080/01140671.2003.9514249  

20. Reganold JP, Glover JD, Andrews PK, Hinman HR (2001) Sustainability of three apple production systems. Nature 410:926-930. doi:10.1038/35073574  

21. Smith GA, Moser HS (1985) Sporophytic-gametophytic herbicides tolerance in sugar beet. Theor. Appl. Genet. 71:231-237.  

22. Southwick FW, Childers NF (1940) The influence of Bordeaux mixture on the rate of photosynthesis and transpiration of apple leaves. Proc. Amer. Soc. Hort. Sci. 37:374.  

23. Steffens CA, Mafra AL, Albuquerque JA, Amarante CV (2008) Yield and fruit quality of apple from conventional and organic production systems. Pes. Agropec. Bras. 43:333-340. doi:10.1590/S0100-204X2008000300007  

24. Subhash CV (1988) Nontarget effects of agricultural fungicides. CRC Press, London, UK.   

25. Untiedt R, Blanke MM (2004) Effect of fungicide and insecticide mixture on apple tree canopy photosynthesis, dark respiration, and carbon economy. Crop Protec. 23:1001-1006. doi:10.1016/j.cropro.2004.02.012   

26. Van Assche F, Clijsters H (1990) Effect of metals on enzyme activity in plants. Plant Cell Environ.13:195-206. doi:10.1111/j.1365-3040.1990.tb01304.x