New record occurrence of Mycosphaerella leaf spot of eucalyptus in Himachal Pradesh.

A study on occurrence and distribution of Mycosphaerella leaf spot of Eucalyptus was conducted at Solan district of Himachal Pradesh during August, 2015 to December, 2015. On the basis of the morphological characteristics, the fungus was identified as Mycosphaerella cryptica and Mycosphaerella marksii which produced symptoms like necrotic spots and patches on leaves and presence of crinkled and distorted foliage. Ascopores of M. cryptica and M. marksii are hyaline, with one septum, fusiform to tunecate and whose size varies from 12-16 x 2-4 μm and 11-14 x 2-3 μm, respectively.

[1]  Pradeep Kumar,et al.  IN VITRO MANAGEMENT OF CURVULARIA LEAF SPOT OF MAIZE USING BOTANICALS, ESSENTIAL OILS AND BIO-CONTROL AGENTS , 2013 .

[2]  N. Altier,et al.  Long term losses caused by foliar diseases on growth and survival of Eucalyptus globulus in Uruguay , 2013, New Forests.

[3]  P. Keane,et al.  The impact of three species of Mycosphaerella newly recorded on Eucalyptus in Western Australia , 1997, Australasian Plant Pathology.

[4]  R. Kohli,et al.  PHYTOTOXIC EFFECT OF EUGENOL TOWARDS TWO WEEDY SPECIES , 2010 .

[5]  B. Thakar,et al.  DUST COLLECTION POTENTIAL AND AIR POLLUTION TOLERANCE INDEX OF TREE VEGETATION AROUND VEDANTA ALUMINIUM LIMITED, JHARSUGUDA , 2010 .

[6]  P. Barber.  Forest Pathology: The threat of disease to plantation forests in Indonesia. , 2004 .

[7]  K. Old,et al.  A manual of diseases of eucalypts in South-East Asia. , 2003 .

[8]  M. Dick,et al.  Mycosphaerella suberosa and M. intermedia sp. nov. on Eucalyptus in New Zealand , 2001 .

[9]  M. Wingfield,et al.  SPECIES OF MYCOSPHAERELLA AND THEIR ANAMORPHS ASSOCIATED WITH LEAF BLOTCH DISEASE OF EUCALYPTUS IN SOUTH AFRICA , 1996 .

[10]  P. Keane,et al.  Further Mycosphaerella species associated with leaf diseases of Eucalyptus. , 1994 .

[11]  M. Wingfield,et al.  Mycosphaerella suberosa associated with corky leaf spots on Eucalyptus in Brazil , 1993 .

[12]  R. Park.  Effect of certain host, inoculum, and environmental factors on infection of Eucalyptus species by two Mycosphaerella species , 1988 .

[13]  R. Park,et al.  Spore production by Mycosphaerella species causing leaf diseases of Eucalyptus , 1987 .

[14]  R. Park,et al.  Leaf diseases of Eucalyptus associated with Mycosphaerella species , 1982 .