Integrated Management of Purple Nutsedge (Record no. 27083)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 04822nam a2200181Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | OSt |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20220930141941.0 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 140128s9999 xx 000 0 und d |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 630 |
| Item number | AME/IN |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Ameena M |
| 245 ## - TITLE STATEMENT | |
| Title | Integrated Management of Purple Nutsedge |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc. | Vellayani |
| Name of publisher, distributor, etc. | Department of Agronomy, College of Horticulture |
| Date of publication, distribution, etc. | 2003 |
| 502 ## - DISSERTATION NOTE | |
| Degree type | PhD |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | An investigation entitled "Integrated management of purple nutsedge (Cyperus rotundus L.)" was conducted during 1999-2002 at College of Agriculture, Vellayani, Thiruvananthapuram. It comprised of one pot study, two field experiments and three laboratory experiments. Pot experiment was conducted to study the biology of purple nutsedge under various seasons and stage of tuberisation. Field experiments were conducted to evolve an integrated management strategy for purple nutsedge control in cropped area and a long-term control strategy in non- cropped area. Laboratory experiments were conducted to assess the allelopathic influence of purple nutsedge root exudates on early growth of crop seeds and nutsedge extracts on weed seeds. An attempt has been made to identify the allelochemicals present in tubers of nutsedge by employing HPLC (High Performance Liquid Chromatography) technique. In pot study, the growth and development of purple nutsedge was observed for a period of one year. Results of the study indicated that chain tuber took more time for sprouting compared to shoot tubers or bulb. The time required to sprout varied with seasons in the case of chain tuber and August and March planted tubers took lesser time for sprouting. March and May planting tecorded more tuber production compared to August and November planting. August planted tubers recorded very early tuberisation and November and May planted tubers took more or less double the time for tuberisation compared to August planted tubers. Field studies in cropped area indicated that the growth characters of okra were significantly influenced by the weed management practices. Flowering was early by about 7-10 days in mulched plots under both stale seed bed and soil exposure treatments compared to weedy check plots. Stale seed bed coupled with mulching registered maximum leaf area index during both the years. All the weed control treatments except where cowpea was raised as smother crop resulted in significantly more fruits per plant and fruit yield per hectare. Maximum productivity of 5.24 t ha" was realised by stale seed bed with eucalyptus mulched plots which was 171.5 and 11 per cent more than weedy check and weed free plots respectively. The treatments had no significant influence on quality attributes of okra like vitamin C, keeping 'quality, protein and fibre content of fruits. Regarding soil fertility status, minimum depletion of nutrients occurred in completely weed free and mulched plots. Stale seed bed with polythene mulching or pre and post emergent glyphosate application were identified as the best nutsedge control measure in cropped area. Post emergent glyphosate application after stale seed bed has found to show spectacular inhibitory effect on nutsedge multiplication and spread and this treatment recorded the highest percentage reduction values for nutsedge control. Lowest rate of regeneration was recorded by this treatment with lower viability of tubers. The most economical treatment was stale seed bed with glyphosate application integrated with eucalyptus mulching and it recorded the highest net returns (Rs.18,2701-) and B:C ratio (2.01). In non-cropped area. results of two seasons study indicated that the effective stage for glyphosate spraying was identified as before tuber initiation. The degree of inhibition exerted by glyphosate on regeneration of nutsedge tubers was higher thanthat of 2.4-0. Among the summer season treatments stale seed bed with irrigation followed by glyphosate application was the best in achieving higher level of control. In allelopathic studies. nutsedge root exudates collected at sprouting stage inhibited the germination and growth of all the crop seeds tested vi : .. rice. co wpea. sesamum. okra and brinjal. Also the nutsedge extracts collected at different stages inhibited the growth and development of Gomphrena de cumbe nse and Syne drell a nodij7ora. The allelochemicals present in tubers of purple nutsedge was identified by High Performance Liquid Chromatography (HPLC) and it indicated the presence of p-hydroxy benzoic acid, p-coumaric acid, m- coumaric acid, vanillic acid and gentisic acid. |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Geetha Kumari V L (Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | http://krishikosh.egranth.ac.in/handle/1/5810015099 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | |
| Koha item type | Theses |
| Withdrawn status | Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Permanent Location | Current Location | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Price effective from | Koha item type |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 2014-03-18 | 630 AME/IN | 172142 | 2014-03-18 | 2014-03-18 | Theses |