Prevalence and management of leaf spots of sorghum
| dc.contributor.advisor | Upasana Rani | |
| dc.contributor.author | Lambay, Gursimran Kaur | |
| dc.date.accessioned | 2018-07-27T06:24:02Z | |
| dc.date.available | 2018-07-27T06:24:02Z | |
| dc.date.issued | 2018 | |
| dc.description.abstract | The present investigation was conducted at Forage Research Farm and Pathology Laboratory of Department of Plant Breeding and Genetics, PAU, Ludhiana during Kharif 2012. Leaf spots were prevalent in Ropar, Hoshiarpur, Jalandhar, Ludhiana, Moga and Faridkot but intensity was more in Hoshiarpur and Ropar. Grey leaf spot was widely and severely distributed than zonate leaf spot and anthracnose. Fungi associated with leaf spots were identified as Cercospora sorghi causing grey leaf spot, Gloeocercospora sorghi causing zonate leaf spot and Colletotrichum graminicola causing anthracnose of sorghum. The fungi associated with these leaf spots has also been detected as part of seed mycoflora and might play role in primary infection. Development of leaf spots revealed that grey leaf spot appeared in first week of July, whereas zonate leaf spot and anthracnose appeared in field in second week of August and end of July respectively with maximum per cent disease index (PDI) of 39.67 (grey leaf spot), 20.42 (zonate leaf spot) and 11.75 (anthracnose) towards the end of the season. Relative humidity and rainfall were positively correlated, whereas temperature was significantly and negatively correlated with develoopment of leaf spots. Grey leaf spot was predominant on all dates of sowing but intensity of all the leaf spots was high in timely and the late sown. Of 119 germplasm accessions, 7 (94001 A, NS 1008-A, SSG 226, SSG 241, SSG 253, SGL 244 and SGL 98-12) showed multiple disease resistance against these leaf spots. Under in vitro conditions, Emisan @ 2.5g/kg seed showed the lowest infection by different mycoflora, whereas under in vivo conditions seed treatment with Emisan @ 2.5g/kg seed and Bavistin @ 3g/kg seed recorded minimum leaf spot intensity in both forage and grain crops. These treatments also showed increase in yield. | en_US |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810062203 | |
| dc.keywords | Sorghum, leaf spots, prevalence, fungitoxicants | en_US |
| dc.language.iso | en | en_US |
| dc.pages | 65 | en_US |
| dc.publisher | Punjab Agricultural University, Ludhiana | en_US |
| dc.research.problem | Prevalence and management of leaf spots of sorghum | en_US |
| dc.sub | Plant Pathology | en_US |
| dc.subject | null | en_US |
| dc.theme | Prevalence and management of leaf spots of sorghum | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | Prevalence and management of leaf spots of sorghum | en_US |
| dc.type | Thesis | en_US |