Surveillance and management of brown spot of potato

Abstract

A survey was conducted to assess the incidence of brown spot disease in three tehsils of District Okara. Maximum incidence was observed in Depalpur (44%) followed by Okara (33%) and Renala khurd (15%). During study, six chemicals (CabrioTop, Fossil, Axel, Forum Top, Kocide and Topsin M) and six phytochemicals (Nigella sativa, Azadirachta indica, Zingiber officinale, Cinnamomum verum, and Eucalyptus globulus) at three different concentrations were evaluated. Results indicated that maximum inhibition of mycellial growth was expressed by Fossil (5.24 mm) followed by Topsin M (7.13 mm), Axel (7.38 mm), Kocide (11.289 mm), Forum Top (18.79 mm), CabrioTop (25.01 mm). Among phyto-extracts, Datura stramonium (7.77 mm) showed maximum reduction in fungal growth followed by Nigella sativa (13.88 mm), Azadirachta indica (19.18 mm), Zingiber officinale (24.87 mm), Cinnamomum Verum (25.59 mm), and Eucalyptus globulus (36.13 mm) as compared to control (water). The current study, offers valuable insights into the prevalence and distribution of brown spot disease in District Okara, there by facilitating the development of focused management strategies to alleviate its impact on potato cultivation.

Keywords:

• Solanum tuberosum
• okara
• Alternaria alternata
• phytochemicals
• management

Acknowledgements

I am very thankful to the citrus pathology laboratory, University of Agriculture, Faisalabad, Pakistan, for providing technical assistance and all the laboratory facilities for conducting research.

Disclosure statement

No potential conflict of interest was reported by the author(s).