Pathological Status ofPyricularia angulataCausing Blast and Pitting Disease of Banana in Eastern India.
Incidence of leaf blast on nursery plants and pitting disease on maturing banana bunches has been recorded in banana plantations during rainy season in Eastern India during 2014 to 2015. Taxonomical identification as well as DNA sequence analysis of the internal transcribed spacer region of fungus isolated from affected tissue culture derived plantlets and fruits confirmed the pathogen to bePyricularia angulataHashioka "in both the cases". Koch's postulates were proved on young plantlets as well as on maturing fruits of cv. Grand Naine under simulated conditions. Evolutionary history was inferred and presented for ourP. angulatastrain PG9001 with GenBank accession no. KU984740. The analysis indicated that theP. angulatais phylogenitically distinct from other related species related to bothPyriculariaandMagnaporthe. Detailed symptoms of blast lesions on young leaves, transition leaves, mid rib, petioles, peduncle, maturing bunches, bunch stalks and cushions were documented. Notably, the distinct small pitting spots on maturing bunches reduced the visual appeal of mature fruits. Appearance of pitting symptoms on fruits in relation with age of fruits and their distribution pattern on bunch and fingers was also documented in detail. Further, the roles of transitory leaves, weed hosts, seasonality on disease occurrence have also been documented.
ICAR-IIHR-Central Horticultural Experiment Station, Bhubaneswar 751019, India.
Sangeetha
S
Ganesan
ICAR-IIHR-Central Horticultural Experiment Station, Bhubaneswar 751019, India.
Hari Shankar
HS
Singh
ICAR-IIHR-Central Horticultural Experiment Station, Bhubaneswar 751019, India.
Srinivas
S
Petikam
ICAR-IIHR-Central Horticultural Experiment Station, Bhubaneswar 751019, India.
Debasish
D
Biswal
Musa spp.; Pyricularia angulata; blast; pitting disease