Comparative Studies on the Efficiency of Different Chemicals to Control Citrus Scab (Elsinoe Fawcettii) in Citrus Reticulata Blanco
DOI:
https://doi.org/10.33866/phytopathol.037.02.1282Abstract
Elsinoë fawcettii, a fungus, is the cause of citrus scab. The disease is economically significant and common, and potential threat to citrus groves worldwide, particularly in areas present in warm and humid regions. The study was planned on the objective to evaluating the fungicides efficacy for the identification of most efficient fungicide to citrus scab. The study was conducted in three consecutive years (2017-18, 2018-19, and 2019-20) on 20 years old Kinnow plants, which were planted at a spacing of 6.1 m x 6.1 m. The foliar spray was applied before flowering in March, after fruit setting in April and in the months of August. Various chemicals including Azoxystrobin, Pyraclostrobin+Metiram, Difenoconazole+Azoxystrobin, Copper Oxychloride +Cymoxanil, Copper hydro oxide, Tebuconazole+Trifloxystrobin, Fluoxstrobin, Bordeaux mixture 1%, Azoxystrobin + Chlorothalnil, and Chlorothalonil+Thiophenate methyl were evaluated and results were compared with control. Diseased data for citrus scab disease was recorded after fifteen days of the last spray. The results revealed the superior efficacy of Difenoconazole+Azoxystrobin (1 ml/L of Water) and Bordeaux mixture (1%) in controlling citrus scab in Kinnow. These systemic fungicides offer significantly better disease suppression and yield improvement than other chemicals. A systemic chemical Fluoxstrobin (1 ml/L of Water) and control (non-treated with chemicals) were inferior to other treatments in controlling citrus scab incidence. Integrating these fungicides with timely applications, for Kinnow disease management programs, can substantially improve fruit quality and farmer profitability.References
Abd El-Rahman, A. F., A. A. El-Kafrawy, O. A. Abd El-Hafez and R. E. Abd El-Ghany (2018). Evaluation of some fungicides effectiveness in control of blackleg and common scab of potato. Egyptian Journal of Agricultural Research, 96(4), 1307-1323.
Adaskaveg, J. E., Michailides, T. and A. Eskalen (2022). Fungicides, bactericides, biocontrols, and natural products for deciduous tree fruit and nut, citrus, strawberry, and vine crops in California. University of California Agriculture and Natural Resources. Accessed April, 3, 2023.
Alam, M. S., A. Hossain, M. I. Hossain, M. Z. Islam, M. M. Bazzaz, S. Naznin and H. Akter (2020). Maximum Congenial Period for Outbreak of Die–Back and Scab Diseases in Citrus and Their Management under Sub–Tropical Region. Thai Journal of Agricultural Science, 53(1), 32-52.
Arutselvan, R., K. Pati, A. Dolatabadian and S. K. Dutta (2023). Citrus Diseases and Management. Recent Advances in Citrus Fruits, 501-526.
Chung, K. R. (2011). Elsinoë fawcettii and Elsinoë australis: the fungal pathogens causing citrus scab. Molecular plant pathology, 12(2), 123-135.
Dewdney, M. M. (2019). 2019–2020 Florida Citrus Pest Management Guide: Citrus Scab: PP- 146/CG020, rev. 3/2019. EDIS, 2-2.
GOP, (2023). Government of Pakistan. Fruits, vegetables, and condiments statistics of Pakistan 2021-22. Ministry of National Food Security & Research Economic Wing, Islamabad, Pakistan
Gill, D. S., M. S. Bajwa and W.S. Bar. 1986. Influence of the tree position of Kinnow fruit on quality and maturity indices. Prog. Hort. 1984, 16(3/4): 222-229.
Hayat, A., M. Nasir, E. Haque, M. Asim, Afzaal, S., Naz, S., ... and T. Mehmood (2022). Growth, quality and nutritional profiling of kinnow mandarin augmented through rootstocks under agro-climatic conditions of Sargodha, Pakistan. Journal of Innovative Sciences, 8(1), 88- 96.
Horsfield, A., T. Wicks and D. Wilson. (2010). Field evaluation of fungicides for the control of rust, brown rot. Australasian Plant Pathology, 39, 112-119.
Hortwitz, W. 1960. Official and tentative methods of analysis. Association of Official Agricultural Chemists, Washington, D.C., Ed. 9: 314-320.
Jamar, L., J. Song, F. Fauche, J. Choi, and M. Lateur. (2017). Effectiveness of lime sulphur and other inorganic fungicides against pear scab as affected by rainfall and timing application. Journal of Plant Diseases and Protection, 124, 383-391.
Jyothi, V., & Shilpa, M. E. (2020). Citrus diseases and their management. In Diseases of Fruits and Vegetable Crops (pp. 41-63). Apple Academic Press.
Khan, M. M., S. Mumtaz, S. Ahmad, M. Abbas and I. A. Khan. (2008). Some studies on the morphology of Kinnow mandarin and Feutrell’s early. Pak J Agric Sci, 42, 424-431.
Krum, J. K. 1955. Truest evaluation in sensory panel testing. Food Engg. 27: 74-83.
Lalancette, N., McFarland, K. A., & Burnett, A. L. (2015). Influence of trifloxystrobin on primary inoculum and progression of scab epidemics on stone fruit. Plant disease, 99(4), 467-473.
Malik, A. U., M. U. Hasan, S. Khalid, M. S. Mazhar, M. S. Khalid, M., M. N., Khan... and R. Anwar. (2021). Biotic and abiotic factors causing rind blemishes in citrus and management strategies to improve the cosmetic quality of fruits.
Meena, P. N., D. Raghavendra, S. Singh, N. Kumar, M. K. Khokhar, S. Chander, ... and R. Kumar. (2025). Integrated Pest Management Techniques in a Kinnow Mandarin (Citrus reticulata Blanco) Orchard with an Emphasis on Yield Improvement. Heliyon.
Munir, N., S. Moazzam, R. Haq and S. Naz (2020). Detection of fungus causing scab disease of citrus in Punjab, Pakistan.
Mondal, S. N., A. Bhatia, T. Shilts and L. W. Timmer. (2005). Baseline sensitivities of fungal pathogens of fruit and foliage of citrus to azoxystrobin, pyraclostrobin, and fenbuconazole. Plant Disease, 89(11), 1186-1194.
Mondal, S. N., A. Vicent, R. F. Reis and L. W. Timmer. (2007). Efficacy of pre-and postinoculation application of fungicides to expanding young citrus leaves for control of melanose, scab, and Alternaria brown spot. Plant disease, 91(12), 1600-1606.
Nassar-Hardy, M. L. (2011). L’université Bordeaux (Doctoral dissertation, Université de Bordeau Directeur de Thèse M. Felpin François-Xavier Professeur, Université de Nantes).
Palei, S., S. K. Behera, and Sethy, P. K. (2023). A systematic review of citrus disease perceptions and fruit grading using machine vision. Procedia Computer Science, 218, 2504-2519.
Prieto, M. C., N. R. Grosso, O. F. Camiletti, and E. Galdeano. (2024). Combined application effect of citrus essential oils against the phytobacterium Streptomyces scabiei. European Journal of Plant Pathology, 1-14.
Steel, R. G. D and J. H. Torrie. 1980. Principles and Procedures of Statistics. McGraw Hill Book Co. Inc., New York, USA
Oh, M. H., J. W. Hyun, W. P. Park and H. N. Hyun. (2020). Suppressive effects of bio-sulfur on citrus scab. Korean Journal of Organic Agriculture, 28(2), 223-233.
Van Zyl, J. G. (2019). Evaluation of adjuvants in fungicide spray application for the control of alternaria brown spot in South African citrus orchards (Doctoral dissertation, Stellenbosch: Stellenbosch University).
Wang, H., Y. Huang, J. Wang, X. Chen, K. Wei, M. Wang and S. Shang. (2016). "Activities of azoxystrobin and difenoconazole against Alternaria alternata and their control efficacy." Crop protection 90: 54-58.
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