Variability and Management of Anthracanose of Guava (Psidium guajava L.)Caused by Colletotrichum gloeosporioides (Penz.)
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Date
2021, 2021
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MPUAT, Udaipur
MPUAT, Udaipur
MPUAT, Udaipur
Abstract
The present study was undertaken to investigate on variability and
management of Anthracnose of Guava (Psidium guajava L.) Caused by
Colletotrichum gloeosporioides (Penz.). Randomly four locations of Udaipur district
viz; Horticulture farm RCA, Mavali, Jhadol and Girwa were surveyed for know the
incidence of anthracnose in guava during 2019. The per cent disease incidence in the
surveyed areas was ranged from 28.50 to 43.30. The maximum 43.30 per cent was
recorded in Girwa location and minimum 28.50 per cent in Horticulture Farm, RCA,
Udaipur.
The pathogenicity of recovered isolates was confirmed by Koch’s postulates
on susceptible guava cultivar ‘Allahabad safeda’. The isolates of Colletotrichum spp.
showed considerable variation in colony growth pattern, colony diameter, rate of
sporulation, color of colony and spore morphology In vitro. The four isolates of C.
gloeosporioides were evaluated for their pathogenic virulence variability under
artificial inoculation condition on fruits of Allahabad safeda cultivar. The C.
gloeosporioides isolate from Girwa (GCG-4) was found highly virulent by producing
high degree of disease severity.
Seven fungicides were evaluated for their efficacy against C. gloeosporioides
at 100, 250, 500 and 1000ppm concentrations, results showed that Tebuconazole,
Hexaconazole and Propiconazole was the most effective in suppressing the mycelial
growth of C. gloeosporioides at 500 and 1000 ppm concentrations. Among the plant
extracts, Neem leaf extract was highly effective against C. gloeosporioides in poison
food technique. In the bioeffecacy of biocontrol agents, Trichoderma harzianum was
showed severe antagonism and highly effective against C. gloeosporioides in dual
culture technique
The present study was undertaken to investigate on variability and management of Anthracnose of Guava (Psidium guajava L.) Caused by Colletotrichum gloeosporioides (Penz.). Randomly four locations of Udaipur district viz; Horticulture farm RCA, Mavali, Jhadol and Girwa were surveyed for know the incidence of anthracnose in guava during 2019. The per cent disease incidence in the surveyed areas was ranged from 28.50 to 43.30. The maximum 43.30 per cent was recorded in Girwa location and minimum 28.50 per cent in Horticulture Farm, RCA, Udaipur. The pathogenicity of recovered isolates was confirmed by Koch’s postulates on susceptible guava cultivar ‘Allahabad safeda’. The isolates of Colletotrichum spp. showed considerable variation in colony growth pattern, colony diameter, rate of sporulation, color of colony and spore morphology In vitro. The four isolates of C. gloeosporioides were evaluated for their pathogenic virulence variability under artificial inoculation condition on fruits of Allahabad safeda cultivar. The C. gloeosporioides isolate from Girwa (GCG-4) was found highly virulent by producing high degree of disease severity. Seven fungicides were evaluated for their efficacy against C. gloeosporioides at 100, 250, 500 and 1000ppm concentrations, results showed that Tebuconazole, Hexaconazole and Propiconazole was the most effective in suppressing the mycelial growth of C. gloeosporioides at 500 and 1000 ppm concentrations. Among the plant extracts, Neem leaf extract was highly effective against C. gloeosporioides in poison food technique. In the bioeffecacy of biocontrol agents, Trichoderma harzianum was showed severe antagonism and highly effective against C. gloeosporioides in dual culture technique
The present study was undertaken to investigate on variability and management of Anthracnose of Guava (Psidium guajava L.) Caused by Colletotrichum gloeosporioides (Penz.). Randomly four locations of Udaipur district viz; Horticulture farm RCA, Mavali, Jhadol and Girwa were surveyed for know the incidence of anthracnose in guava during 2019. The per cent disease incidence in the surveyed areas was ranged from 28.50 to 43.30. The maximum 43.30 per cent was recorded in Girwa location and minimum 28.50 per cent in Horticulture Farm, RCA, Udaipur. The pathogenicity of recovered isolates was confirmed by Koch’s postulates on susceptible guava cultivar ‘Allahabad safeda’. The isolates of Colletotrichum spp. showed considerable variation in colony growth pattern, colony diameter, rate of sporulation, color of colony and spore morphology In vitro. The four isolates of C. gloeosporioides were evaluated for their pathogenic virulence variability under artificial inoculation condition on fruits of Allahabad safeda cultivar. The C. gloeosporioides isolate from Girwa (GCG-4) was found highly virulent by producing high degree of disease severity. Seven fungicides were evaluated for their efficacy against C. gloeosporioides at 100, 250, 500 and 1000ppm concentrations, results showed that Tebuconazole, Hexaconazole and Propiconazole was the most effective in suppressing the mycelial growth of C. gloeosporioides at 500 and 1000 ppm concentrations. Among the plant extracts, Neem leaf extract was highly effective against C. gloeosporioides in poison food technique. In the bioeffecacy of biocontrol agents, Trichoderma harzianum was showed severe antagonism and highly effective against C. gloeosporioides in dual culture technique
Description
Variability and Management of Anthracanose of Guava Caused by Colletotrichum gloeosporioides
Variability and Management of Anthracanose of Guava Caused by Colletotrichum gloeosporioides
Variability and Management of Anthracanose of Guava Caused by Colletotrichum gloeosporioides
Keywords
Citation
Singh P. And Meena N.L.
Singh P. And Meena N.L.
Singh P. And Meena N.L.