Survey On Phytophthora Diseases In Nagpur Mandarin

s p Wagh; R M Gade; R S Lad

doi:10.48165/

Authors

s p Wagh M. Sc. Student, Department of Plant Pathology, Dr. P.D.K.V., Akola (M.S.)
R M Gade Associate Dean, VNCABT, Yavatmal,
R S Lad Ph. D. Scholar, Department of Plant Pathology, Dr. P.D.K.V., Akola (M.S.)

DOI:

https://doi.org/10.48165/

Keywords:

Survey, Phytophthora spp, incidence, intensity, gummosis, root rot

Abstract

Rapid roving survey was undertaken during 2015-2016 to assess the incidence and severity of gummosis and root rot caused by Phytophthora spp. in major citrus growing areas of Amravati district of Maharashtra during peak period of diseases i.e. July to December. Almost all surveyed orchards were found infected with Phytophthora spp. Three Phytophthora spp. i.e. Phytophthora palmivora, P. nicotianae = parasitica and P. citrophthora were associated with gummosis and root rot. Highest gummosis incidence of 50.50 percent observed in the village Perla field II, while highest disease intensity was recorded in the Lehgaon field II (28.00%) of Morshi tahsil. Similarly, highest root rot incidence observed in Sawarkhed field II (40.00%) with highest disease intensity was recorded in Perla field II (24.55%). Minimum incidence and intensity of gummosis was recorded in Manglurpeth field II which was 14.00 % and 8.50 %, respectively. Lowest disease incidence (18.00%) and intensity (6.70 %) of root rot was recorded in Manglurpeth field I. Citrus jambhiri Lush is the most widely used root stock for most of citrus scion in study area, which is highly susceptible to Phytophthora diseases.

References

Das, A. K., A. Kumar, A. Ingle and S. Nerkar, 2011: Molecular identification of Phytophthora spp. causing citrus decline in Vidarbha region of

Maharashtra. Indian Phytopath., 64(4):342-345. Gade, R. M. and M. D. Koche, 2012: Integrated disease management for root rot & gummosis in Nagpur mandarin. Indian Phytopath., 65 (3) : 272-275.

Gade, R. M., G. K. Giri and U. R. Sangle, 2005: Management of Phytophthora and root rot in citrus nursery. Pesticide Res. J., 17(1): 28-29.

Gade, R. M., O. M. Bambawale, U. R. Sangle and V. B. Shinde, 2006: Chemical management of gummosis in Nagpur mandarin (Citrus reticulata Blanco). Pesticides Res. J., 18 (2) : 169-172.

Gade, R. M., 2012: Biological and chemical management of Phytophthora root rot /collar rot in citrus nursery. The Bioscan, 7 (4): 631-635.

Jagtap, G. P., M. C. Dhavale and U. Dey, 2012: Symptomatology, survey and surveillance of citrus gummosis caused by Phytophthora spp. Scientific Journal of Agriculture, 1(1): 14-20.

Lende, A. S., R. M. Gade and A. V. Shitole, 2016 : Strategies for Management of Phytophthora Root Rot and Gummosis in Nagpur Mandarin. J. Pl. Dis. Sci., 11(1): 93-101

Naqvi, S. A. M. H., 1988: Prevalence of Phytophthora spp. pathogenic to citrus in orange groves of Vidarbha, Maharashtra. Indian J. Mycol. Pl. Pathol., 18 (3): 274-276.

Naqvi, S. A. M. H., 2006: Distribution of citrus Phytophthora spp. And mating types pathogenic to citrus in central India. J. Mycol. Pl. Pathol., 4: 143- 149.

Savita, G. Singh, Virk and A. Nagpal, 2012: Citrus diseases caused by Phytophthora spp. GERF Bulletin of Biosci., 3(1) : 18-27.

Sudarshan Rao, A. N., 1975: Survey, surveillance and forecast in plant protection. Kisan World, 2: 43-44.