POLYALTHIA LONGIFOLIA A NEW HOST RECORD OF NIGROSPORA SPHAERICA CAUSING LEAF BLIGHT IN PAKISTAN AND EFFICACY DETERMINATION OF VARIOUS FUNGICIDES AGAINST THIS PATHOGEN

Imran Ul. Haq, Muhammad Shoaib, Siddra Ijaz, Siddra Ijaz, Khalid P. Akhtar, Khalid P. Akhtar, Sajid A. Khan, Sajid A. Khan, Nabeeha A. Khan, Nabeeha A. Khan

Abstract


 

Severe leaf and stem necrosis of Polyalthia longifolia (Ulta-Ashoka) was observed in Pakistan during summer 2012. Symptoms on leaves were initiated with drying followed by whole leaf and plant drying. The casual pathogen was identified as Nigrospora sphaerica based on cultural characteristics and conidial morphology. Its pathogenicity was proven on healthy P. longifolia plants. This is the first report of Nigrospora sphaerica causing leaf blight on P. longifolia in Pakistan. Furthermore for the selection of most effective fungicide that can be used for the chemical management of the disease under field conditions three fungicides viz., Antracol (ChlorotHalonil), Halonil (Propineb) and Aerosil (Thiophenate methyl) were evaluated against mycelia growth of Nigrospora sphaerica under controlled conditions . Two concentrations were used for every fungicide as it was 500 and 1000 ppm. It was concluded from the results obtained that Halonil was found to be effective fungicide by reducing the mycelia growth of Nigrospora sphaerica by 78.4%. followed by Antracol and Aerosol respectively.


Keywords


Nigrospora sphaerica, Ulta-Ashoka, ornamental plant, first disease report and fungicides

Full Text:

PDF

References


Abass, M., H. Hameed and A. N. Ahmed, 2013. First report of Nigrospora sphaerica (Sacc.) Mason as a potential pathogen on date palm (Phoenix dactylifera L.). Can. J. Pl. Pathol., 35: 75-80.

Akhtar, K. P., N. Sarwar and I.U. Haq, 2012. Nimbya alternantherae reported for the first time to cause leaf and stem necrosis of Alternanthera philoxeroides (alligatorweed) in Pakistan.Trop. Pl. Pathol., 37: 428-430.

Akhtar, K.P., N. Sarwar, M. Y. Saleem and M. Asghar, 2011. Convolvulus arvensis, a new host for Alternaria solani causing early blight of Solanum lycopersicum in Pakistan. Aust. Pl. Dis.Notes., 6: 84-86.

Chen, C.Y., F.R. Chang, Y.C. Shih, T. J. Hsieh, Y.C. Chia and H.Y. Tseng, 2000. Cytotoxic constituents of Polyalthia longifolia var. pendula. J. Nat. Prod., 63:1475-1478.

Dhingra, O.D and J.B. Sinclair. 1985. Basic Plant Pathology Methods. CRC Press, Inc., Florida, USA, 355pp.

Ellis, M.B, 1971 ‘Dematiacceous Hyphomycetes’. CMI: Kew, UK.

Farr, D.F and A.Y. Rossman, 2010. Fungal database, systematic mycology and microbiology laboratory, ARS, USDA. Retrieved July 15, 2010, from http:// nt.ars-grin.gov/fungal database.

Haq, I.U., S. A. Khan & M. Shoib, M. Iqbal (2014) First record of Polyalthia Longifolia Leaf Blight caused by Nigrospora sphaerica in Pakistan and its chemical management. In 8th international conference on “agriculture, food security and climate change”Sep,2014 University of Poocnh Rawalakot

Mitra, D., D.D. Sharma,N.P. Balakrishnan, R.R. Rao and P.K. Hajara, 1993. Flora of India (Ranunculaceae- Barclayaceae). Bot. Sur. Ind., 1:202-203.

Nair, R., V. Shukla and S. Chanda, 2007. Assessment of Polyalthia longifolia var. pendula for hypoglycemic and antihyperglycemic activity. J. Clin. Dia. Res. 3:116-121.

Soylu, S, S. Dervis and E.M. Soylu, 2011. First report of Nigrospora sphaerica causing leaf spots on Chinese wisteria: A new host of the pathogen. Pl. Dis., 95: 219-221.

Steel RGD, J.H Torrie, D.A Dicky (1997) Principles and procedures of statistics-A Biometrical Approach. 3rd edn. McGraw Hill Book International Co, Singapore.

Sundar, A.R., N.D. Das and D. Krishnaveni. 1995. In-vitro Antagonism of Trichoderma spp. Against two fungal pathogens of castor. India J. Plant Protec. 23(2):152-155. The American Phytophological Society, 28-31.

Verma, O.P and R.B.L.Gupta, 2008. A new host for Nigrospora sphaerica causing leaf spots on Glycyrrhiza glabra. Pl. Pathol., 57: 782.

Warrier, P.K., V.P.K. Nambiar and C. Ramankutty, 2002. Indian medicinal plants. IV. Orient Blackswan, India., Pp 330.

Zhang, L.X., J.H. Song and G.J. Tan, 2011. First report of leaf blight caused by Nigrospora sphaerica on curcuma in China. Pl. Dis., 95: 190-194.




DOI: https://doi.org/10.33866/phytopathol.029.01.0368

Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 Imran Ul. Haq, Muhammad Shoaib, Siddra Ijaz, Siddra Ijaz, Khalid P. Akhtar, Khalid P. Akhtar, Sajid A. Khan, Sajid A. Khan, Nabeeha A. Khan, Nabeeha A. Khan

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

      
   
Pakistan Journal of Phytopathology
ISSN: 1019-763X (Print), 2305-0284 (Online).
© 2013 Pak. J. Phytopathol. All rights reserved.