Indian Phytopathology

, Volume 71, Issue 2, pp 213–218 | Cite as

Epidemiological relations to population dynamics of Phytophthora spp. in Mandarin

  • S. P. Wagh
  • R. M. Gade
  • R. S. LadEmail author
  • J. Adinarayana
  • K. B. V. N. Phanindra


Fixed plot survey was undertaken to plot correlation between environmental factors with population of Phytophthora spp. in soil and the disease intensity during June 2015 to May 2016. Agro-meteorological data was recorded by using wireless sensors (for air temperature 107 Temperature probe, for relative humidity HC2S3 and for rainfall measurement Texas Electronic rain gauge) in selected plots. All four orchards were found infected with Phytophthora in the range of 3.2–43.6 cfu/g of soil. There was consistent increase in pathogen population in all plots with increase in rainfall, relative humidity with decrease in temperature and vice versa. At high rainfall condition intensity of root rot was increased to 35.81 per cent in the month of August and gummosis (41.01%) was also increased in the month of October with average propagules of 25.84 cfu/g of soil. Increase in temperature decreased intensity of gummosis (26.29%) and root rot (20.09%) in the month of May, with the average propagules, i.e., 4.56 cfu/g of soil. Present findings suggest that, humidity and rainfall were significantly correlates with population dynamics of Phytophthora spp. and disease intensity, while temperature was found inversely proportional.


Citrus Gummosis Intensity Propagules Root rot Phytophthora 



The authors are thankful to the Information Technology Research Academy (ITRA), Ministry of Information Technology, GOI, New Delhi for providing fellowship and funding to conduct this research work. We are also thankful to Indian Institute of Technology (IIT) Bombay and Indian Institute of Technology (IIT), Hyderabad for providing sensor-based data on environmental factors of all four experimental plots.


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Copyright information

© Indian Phytopathological Society 2018

Authors and Affiliations

  • S. P. Wagh
    • 1
  • R. M. Gade
    • 1
  • R. S. Lad
    • 1
    Email author
  • J. Adinarayana
    • 2
  • K. B. V. N. Phanindra
    • 3
  1. 1.Dr. Panjabrao Deshmukh Krishi VidyapeethAkolaIndia
  2. 2.Indian Institute of Technology BombayMumbaiIndia
  3. 3.Indian Institute of Technology HyderabadKandiIndia

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