Survival and management of Colletotrichum gloeosporioides (Penz. & Sacc.) causing mango anthracnose (Mangifera indica L.)
| dc.contributor.advisor | Rajender Singh | |
| dc.contributor.author | Pavitra Kumari | |
| dc.date.accessioned | 2017-11-21T09:52:53Z | |
| dc.date.available | 2017-11-21T09:52:53Z | |
| dc.date.issued | 2017 | |
| dc.description.abstract | Mango anthracnose caused by Colletotrichum gloeosporioides (Penz. & Sacc.) is a very serious fungal disease and causes substantial yield losses in mango cultivars. The present investigations were carried out on survival and viability of C. gloeosporioides fungus, evaluation of different inoculation methods for disease development and evaluation of fungicides and botanicals for their efficacy. The efficacy of urea was tested under in vitro conditions; urea was found effective in inhibition of mycelial growth up to 72.8 per cent at 5% concentration. The pathogen survived for seven month in soil as conidia or mycelium in infected debris under adverse conditions. As the depth and duration increased, there has been a decrease in viability of the fungus indicating its long survival on the soil surface only. The fungus could not survive at 5 cm depth after seven months of burial in comparison to 81.6 per cent survival at same depth after one month of burial. At 5 cm and 10 cm depth conidia or mycelium remained viable for five months at 2% urea concentration, however, fungus remained viable up to four months at 5% urea concentrations. The fungus invaded the host tissues through the injured as well as intact surface of leaves and fruits showing clearly its pathogenic ability. The disease symptoms appeared on mango leaves and fruits after 36 hours of pin prick inoculation method at 25±1˚ C. Out of five fungicides tested in vitro, carbendazim completely inhibited mycelial growth up to 100% at 100 ppm concentration. Propiconazole at 500 ppm, while mancozeb at 1000 ppm concentration inhibited mycelial growth up to 100%. Among botanicals eucalyptus leaf extract was found most effective in inhibition of mycelial growth up to 70.4 per cent at 10 per cent concentration. Under field conditions, two foliar spray with carbendazim @ 0.1% at 15 and 30 days after inoculation disease was found most effective in controlling disease up to 71.43% and 65.22 per cent in cv. Langra and Dashehari, respectively. Two foliar sprays with eucalyptus leaf extract @ 10% at 15 and 30 days after inoculation was also found effective in reducing the disease severity over untreated control. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810036135 | |
| dc.keywords | Anthracnose, Botanicals, Colletotrichum gloeosporioides, Fungicides, Management, Mango, Survival | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | CCSHAU | en_US |
| dc.sub | Plant Pathology | en_US |
| dc.subject | null | en_US |
| dc.theme | Survival and management of Colletotrichum gloeosporioides (Penz. & Sacc.) causing mango anthracnose (Mangifera indica L.) | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Survival and management of Colletotrichum gloeosporioides (Penz. & Sacc.) causing mango anthracnose (Mangifera indica L.) | en_US |
| dc.type | Thesis | en_US |