Effect of management practices on the incidence and intensity of grey blight disease of coconut
| dc.contributor.advisor | Padmakumari, G | |
| dc.contributor.author | Anupama, N | |
| dc.contributor.author | KAU | |
| dc.date.accessioned | 2020-11-18T09:36:13Z | |
| dc.date.available | 2020-11-18T09:36:13Z | |
| dc.date.issued | 1997 | |
| dc.description | MSc | en_US |
| dc.description.abstract | From a detailed survey on the occurrence of leaf blight disease of coconut in Thiruvananthapuram (Coconut Research Station, Balaramapuram and Instructional Farm, Vellayani) and Alappuzha Districts (Rice Research Station, Kayarnkulam) it was revealed that Pestalotiopsis palmarum (Cooke) Stey was the major pathogen causing grey leaf blight of coconut in both the areas. Curvularia sp. were also found to be contribute to this disease. Of the various media tested, best growth of P. palmarum was seen in potato dextrose agar and broth. Among the various carbon sources tested dextrose, starch and inositol were equally effective for the growth of P. palmarum and for Curvularia sp., Sucrose, dextrose and starch were the best carbon sources. A temperature of 25°C and 35°C was found to be optimum for the growth of P. palmarum and Curvularia sp respectively. Arecanut, cinnamon, clove, guava, mango, nutmeg and sapota intercropped with coconut in the three locations were found to be host of the pathogen P. palmarum. In vitro evaluation of fungicides revealed that Bordeaux mixture (1000 ppm) and Bavistin (2000 ppm) were superior in inhibiting the growth of P. palmarum on the other hand Bordeaux mixture (1000 ppm) and Dithane M-45 (1000 ppm) effectively inhibited the growth of Curvularia sp. Monitoring of the disease intensity over a period of 12 months has shown that grey leaf blight intensity was high in palms planted at closer spacing and which received no fertilizers. The disease intensity was minimum in palms with wider spacing and with higher level of fertiliser (N2P2K2). In general higher level of fertilizers and wider spacing may be considered as a management practice for controlling the incidence and intensity of the grey blight diseases in coconut palm in South Kerala. | en_US |
| dc.identifier.citation | 171198 | en_US |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810155215 | |
| dc.keywords | Plant Pathology | en_US |
| dc.language.iso | English | en_US |
| dc.publisher | Department of Plant Pathology, College of Agriculture, Vellayani | en_US |
| dc.sub | Plant Pathology | en_US |
| dc.theme | Management practices on the incidence and intensity of grey blight disease of coconut | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Effect of management practices on the incidence and intensity of grey blight disease of coconut | en_US |
| dc.type | Thesis | en_US |