Effect of weather on leaf blast incidence in rice and predicting potential epidemics under various climate change scenarios (Record no. 157862)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 05053nam a22001697a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 551.6 |
| Item number | ASW/EF |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Aswathi N R |
| 245 ## - TITLE STATEMENT | |
| Title | Effect of weather on leaf blast incidence in rice and predicting potential epidemics under various climate change scenarios |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT) | |
| Place of publication, distribution, etc | Vellanikkara |
| Name of publisher, distributor, etc | Academy of Climate Change Education and Research |
| Date of publication, distribution, etc | 2016 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 104 |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | BSc-MSc (Integrated) |
| 520 3# - SUMMARY, ETC. | |
| Abstract | The rate of global warming is expected to continue increasing if no mitigation<br/>efforts take place to reduce the carbon intensity of the world economy and the<br/>consequent emission of green-house gases (Raupach et al., 2007). Agricultural<br/>production, and thus global food security, is directly affected by global warming<br/>(Ainsworth and Ort, 2010).<br/>Rice production plays an essential role in feeding the world’s population and<br/>will continue to be in the future, because rice is the most important global staple food<br/>in many countries. The production of rice, along with other agricultural crops, will be<br/>impacted by climate change. There is still great uncertainty about how climatic and<br/>atmospheric changes will affect the future productivity of food crops. Major future<br/>impacts of climate change are expected on food security and agricultural incomes,<br/>including shifts in production areas across the world.<br/>In addition to affecting rice production, climate change may alter pathogen<br/>dissemination and development rates, and modify the resistance, growth and<br/>metabolism of host plants. The geographical distributions of pathogens are very likely<br/>to change, and losses can be expected, in part due to altered effectiveness of control<br/>strategies. Thus climate change is a serious threat to agriculture because it can lead to<br/>significant changes in the occurrence and severity of plant diseases. All phases of the<br/>disease cycle, from the germination of spores to the development of lesions, are<br/>considerably influenced by climatic factors. The most important climatic factors are<br/>temperature and precipitation. These factors may be modified by the coming climate<br/>changes. Recent research indicates that the monsoon has changed in two significant<br/>ways during the past half-century: it has weakened (less total rainfall during June–<br/>September; Ramanathan et al. 2005; Dash et al. 2007), and the distribution of rainfall<br/>within the monsoon season has become more extreme (Goswami et al. 2006; Dash et<br/>al. 2009).<br/>Rice blast caused by Pyricularia oryzae an important disease of rice<br/>worldwide is known to cause severe yield losses in rice production area where high<br/>inputs of nitrogen fertilizer and favourable climatic conditions occur. Sometimes the<br/>yield losses reach as high as 50% in upland cultivations.<br/>Objectives of the study were to Study the effect of various weather parameters<br/>and climate change on incidence and development of leaf blast disease of rice and<br/>evaluation of disease forecasting models for leaf blast of rice. The field experiments<br/>were conducted during May 2016 to October 2016 at the Regional Agricultural<br/>Research Station of the Kerala Agricultural University at Pattambi, Palakkad district,<br/>Kerala.<br/>Crops sowing June showed a higher disease incidence compared to other dates<br/>of sowing. It was also noticed that variety Kanchana is more susceptible to Leaf blast<br/>incidence compared to Jyothi. The effect of weather on LAI significantly varied with<br/>varieties. The effect of weather on grain yield was significant. Under upland condition<br/>the sheath blight disease incidence was not observed even after artificial<br/>inoculation.The effects of weather and varieties on leaf blast incubation period were<br/>significant.<br/>EPRICE model developed by Savary et al., (2012) was used to forecast the<br/>disease severity of leaf blast disease in rice after transplanting. The model works on<br/>daily weather parameters particularly rainfall, maximum and minimum temperature,<br/>morning and afternoon relative humidity. RMSE for Kanchana prediction is 0.265.<br/>This shows that the predicted leaf blast severity was in good agreement with the<br/>observed values. So this model can be used for forecasting the rice blast severity<br/>under Kerala conditions.<br/>The future climatic projections have taken from Ensemble of 17 General<br/>Circulation Models (GCMs). The future carbon dioxide concentrations and climate<br/>data has been incorporated into disease simulation model-EPIRICE and predicted the<br/>future disease incidence possibility of blast for the years 2030, 2050 and 2080 in all<br/>the 14 districts of Kerala. The climate data for the years 2030, 2050 and 2080 under<br/>different RCPs. The impact of climate change on leaf blast severity in the various<br/>districts of Kerala showed a varying trend. Except in the northern districts<br/>(Malappuram, Wayanad, Kannur and Kasaragod) the disease severity showed a<br/>decreasing trend.<br/> |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name as entry element | Climate Change Education and Research |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Sunil K M (Guide) |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | http://krishikosh.egranth.ac.in/handle/1/5810141403 |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Dewey Decimal Classification |
| Item type | Theses |
| Not for loan | Collection code | Home library | Current library | Shelving location | Date acquired | Full call number | Barcode | Date last seen | Koha item type |
|---|---|---|---|---|---|---|---|---|---|
| Not For Loan | Reference Book | KAU Central Library, Thrissur | KAU Central Library, Thrissur | Theses | 08/12/2017 | 551.6 ASW/EF | 174043 | 08/12/2017 | Theses |