Citrus canker, caused by Xanthomonas citri subsp. citri, poses a significant threat to global citrus production due to its detrimental effects on fruit yield and quality. An integrative management approach combining cultivar resistance screening and allelopathic strategies offers a sustainable solution to combat this disease. This study evaluates the resistance of diverse citrus cultivars to citrus canker under controlled and field conditions, identifying promising genotypes with inherent tolerance. Simultaneously, the allelopathic potential of plant-derived extracts and compounds is assessed for their efficacy in suppressing X. citri growth and mitigating disease symptoms. Results demonstrate the synergistic potential of deploying resistant cultivars alongside allelopathic treatments to reduce disease incidence and enhance orchard productivity. This research underscores the importance of integrating genetic and ecological tools for the sustainable management of citrus canker, contributing to resilient citrus production systems.

Citrus canker, Xanthomonas citri, Cultivar resistance

Islam MA, Mazumdar RM, Islam S, Alam MJ, Urmee S A (2014) Isolation, Identification and In Vitro Antibiotic Sensitivity Pattern of Citrus Canker Causing Organism Xanthomonas axonopodis. Advancements in Life Sciences 1: 215-222.

Imran M, Mustafa M, Azeem M, Awais M, Khan MA (2015) Correlation of environmental variables on canker disease development in commercial citrus cultivars of Pakistan. International Journal of Biosciences 7: 1-13.

Memon NA (2017) Citrus fruit (Kino). Exclusive on Kino. Pakistan Food Journal 29-31.

Don Matesz (2010) Ancient healing: Traditional uses of peel. http://www.motherearthliving.com /health-andwellness/citruspeel-medicine.

Tahir HA, Sahi ST, Habib A, Haq IU, Ahmad A, et al. (2016) Evaluation of plant extracts as biocontrol agents against Xanthomonas axonopodis pv. citri the cause of citrus canker. Pakistan Journal of Phytopathology 28: 35-43.

Kazmi SK, Khan S, Mirbahar AA, Kabir N (2018) Micropropagation of nucellar embryos and their histological comparative study for regeneration ability with other explants of kinnow mandarin (citrus reticulata blanco). Pakistan Journal of Botany 50: 345-353.

Ismail M, Zhang J (2004) Post-harvest citrus diseases and their control. Outlooks on Pest Management 15: 29-35.

USDA Foreign Agriculture Service (2017) https://gain.fas.usda. gov/Pages/Default.aspx.

Goto M (1992) Citrus canker. Diseases of fruit crops, volume 3.’ (Eds J Kumar, HS Chaube, US Singh, AN Mukhopadhyay) pp. In ‘Plant diseases of international importance 9: 170-208.

Wakimoto S (1967) Some characteristics of citrus canker bacteria, Xanthomonas citri (Hasse) Dowson, and the related phages isolated from Japan. Ann. Phyto pathological Society of Japan 33: 301-310.