7th International Science Congress (ISC-2017).  International E-publication: Publish Projects, Dissertation, Theses, Books, Souvenir, Conference Proceeding with ISBN.  International E-Bulletin: Information/News regarding: Academics and Research

Epidemiological studies on downy mildew of bitter gourd caused by Pseudoperonospora cubensis

Author Affiliations

  • 1Indira Gandhi Krishi Vishwavidyalay, Raipur, CG, India
  • 2Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, MS, India
  • 3Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, MS, India
  • 4Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, MS, India

Res. J. Agriculture & Forestry Sci., Volume 5, Issue (8), Pages 1-5, August,8 (2017)

Abstract

Periodical development of disease during the period revealed that, there was an increase and decrease of downy mildew disease severity from fourth October to fourth January. Disease severity gradually increases from fourth October and continued till first November (25.97 to 59.10 %), where it reached at its maximum. The rate of disease development / unit /day (r value) varied from 2.6x10-4 to 6.82x10-5. The correlation between disease severity and environmental factors in bitter gourd indicated no definite relationship pattern. In most of the cases correlation co-efficient is negative except of relative humidity but not significant. Correlation is also positive in case of temperature difference. Maximum disease severity in first week of November is may be due to less difference in temperature and relative humidity.

References

  1. Rai N. and Yadav D.S. (2005)., Advances in Vegetable Production., Research Co Publishing, New Delhi, 325-337.
  2. Badadoost M. (2001)., Downy mildew of cucurbits., University of Illinois Agricultural Services, 345.
  3. Plank J.E. (1963)., Plant Diseases: Epidemics and Control., Academic Press, New York, 34.
  4. Vijayaraghavan Reshmy, Louis Vimi, Mathew S.K., Davis Fridin, Varghese Anjaly and Dilna (2017)., Planta studies on downy mildew disease of bitter gourd using fungicides and bioagents., Int. J. Curr. Microbiol. App. Sci., 6(3), 945-950.
  5. Gandhi S.K., Maheshwari S.K. and Mehta N. (1996)., Epidemiological relationship between ridge gourd downy mildew and metrological factors., Pl. Dis. Res., 11(1), 62-66.
  6. Ullasa B.A. and Amin K.S. (1988)., Ridgegourd downy mildew epidemics in relation to fungicidal sprays and yield loss., Mysore J. of Agril. Sci., 22(1), 62-67.
  7. Cheah L.H., Page B.B.C. and Cox J.K. (1996)., Epidemiology of powdery mildew (Sphaerotheca fuliginea) of squash., Proceedings of 49th New Zealand Plant Protection Conference, 147-151.
  8. Pawar V.P. and Chavan A.M. (2010)., Incidence of powdery mildew on cucurbits plants and its ecofriendly management., J. Ecobiotechnology, 2(6), 29-43.
  9. Colucci Susan J. and Holmes Gerald J. (2010)., Downy mildew of cucurbits., APSnet. DOI:10.1094/PHI-I-2010-0825-01.