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  1. Article ; Online: Spatial estimation and climate projected change of cover-management factor in semi-arid region of India

    PUSHPANJALI PUSHPANJALI / JOSILY SAMUEL / RAMA RAO C A / RAJU B M K / KARTHIKEYAN K

    The Indian Journal of Agricultural Sciences, Vol 91, Iss

    2022  Volume 4

    Abstract: Soil erosion and its future projection play an important role in the changing climatic scenario. An attempt has been made to establish a relationship between NDVI and cover-management factor (C-factor) which varies with area and crop. IRS LISS III data ... ...

    Abstract Soil erosion and its future projection play an important role in the changing climatic scenario. An attempt has been made to establish a relationship between NDVI and cover-management factor (C-factor) which varies with area and crop. IRS LISS III data with 23.5 m resolution is used to derive precisely NDVI and correlated with C-factor, the derived regression equation shows a good relationship between NDVI and C-factor value. An approach was made to use this area specific equation for getting C- factor for the whole Mahabubnagar district, Telangana from 2013 imagery data and the study was conducted in 2017. For future scenarios study, a relationship between rainfall, temperature, and NDVI of the whole district was derived. The NDVI value of the study area varies between 0.63 and 0.046. Based on the regression model C-factor for the future scenarios using available CMIP5 (Coupled Model Intercomparison Project-5) has been mapped for the whole district. Using the NDVI map, the C-factor map of the area was prepared in ArcGIS 10.0 software. The spatial distribution shows that the C-factor values varied between 0.52-0.86. On an average C- factor for 2020s, 2050s and in 2080s were 0.53, 0.76, and 0.77 respectively. The predicted C- factor values were then brought under the GIS environment and C- factor prediction maps were generated.
    Keywords C-factor ; Climate change ; GIS ; RUSLE ; Semi-arid tropics ; Soil erosion ; Agriculture ; S
    Subject code 306 ; 910
    Language English
    Publishing date 2022-10-01T00:00:00Z
    Publisher Indian Council of Agricultural Research
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Pest scenario of Helicoverpa armigera (Hub.) on pigeonpea during future climate change periods under RCP based projections in India.

    Srinivasa Rao, M / Rama Rao, C A / Raju, B M K / Subba Rao, A V M / Gayatri, D L A / Islam, Adlul / Prasad, T V / Navya, M / Srinivas, K / Pratibha, G / Srinivas, I / Prabhakar, M / Yadav, S K / Bhaskar, S / Singh, V K / Chaudhari, S K

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 6788

    Abstract: Gram pod borer, Helicoverpa armigera (Hub.) is the major insect pest of pigeonpea and prediction of number of generations (no. of gen.) and generation time (gen. time) using growing degree days (GDD) approach during three future climate change periods ... ...

    Abstract Gram pod borer, Helicoverpa armigera (Hub.) is the major insect pest of pigeonpea and prediction of number of generations (no. of gen.) and generation time (gen. time) using growing degree days (GDD) approach during three future climate change periods viz., Near (NP), Distant (DP) and Far Distant (FDP) periods at eleven major pigeonpea growing locations of India was attempted. Multi-model ensemble of Maximum (Tmax) and Minimum (Tmin) temperature data of four Representative Concentration Pathways viz., RCP 2.6, 4.5, 6.0 and 8.5 of Coupled Model Inter comparison Project 5 (CMIP5) models was adopted here. The increase in projected Tmax and Tmin are significant during 3 climate change periods (CCPs) viz., the NP, DP and FDP over base line (BL) period under four RCP scenarios at all locations and would be higher (4.7-5.1 °C) in RCP 8.5 and in FDP. More number of annual (10-17) and seasonal (5-8) gens. are expected to occur with greater percent increase in FDP (8 to 38%) over base line followed by DP (7 to 22%) and NP (5to 10%) periods with shortened annual gen. time (4 to 27%) across 4 RCPs. The reduction of crop duration was substantial in short, medium and long duration pigeonpeas at all locations across 4 RCPs and 3 CCPs. The seasonal no.of gen. is expected to increase (5 to 35%) with shortened gen. time (4 to 26%) even with reduced crop duration across DP and FDP climate periods of 6.0 and 8.5 RCPs in LD pigeonpea. More no. of gen. of H. armigera with reduced gen. time are expected to occur at Ludhiana, Coimbatore, Mohanpur, Warangal and Akola locations over BL period in 4 RCPs when normal duration of pigeonpeas is considered. Geographical location (66 to 72%), climate period (11 to 19%), RCPs (5-7%) and their interaction (0.04-1%) is vital and together explained more than 90% of the total variation in future pest scenario. The findings indicate that the incidence of H. armigera would be higher on pigeonpea during ensuing CCPs in India under global warming context.
    MeSH term(s) Animals ; Climate Change ; Moths ; Global Warming ; Temperature ; India
    Language English
    Publishing date 2023-04-26
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-32188-1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Pest scenario of Spodoptera litura (Fab.) on groundnut under representative concentration pathways (RCPs) based climate change scenarios.

    Srinivasa Rao, M / Rama Rao, C A / Sreelakshmi, P / Islam, Adlul / Subba Rao, A V M / Ravindra Chary, G / Bhaskar, S

    Journal of thermal biology

    2020  Volume 94, Page(s) 102749

    Abstract: Multi-model ensemble of Maximum (Tmax) and Minimum (Tmin) temperature data of four Representative Concentration Pathways viz., RCP 2.6, RCP 4.5, RCP 6.0 and RCP 8.5 of Coupled Model Intercomparison Project 5 (CMIP5) models were generated for ten major ... ...

    Abstract Multi-model ensemble of Maximum (Tmax) and Minimum (Tmin) temperature data of four Representative Concentration Pathways viz., RCP 2.6, RCP 4.5, RCP 6.0 and RCP 8.5 of Coupled Model Intercomparison Project 5 (CMIP5) models were generated for ten major groundnut growing locations of the India to predict the number of generations of Spodoptera litura (Fab.) using Growing Degree Days approach during three future climate viz., Near (NF), Distant (DF) and Very Distant (VDF) periods and were compared over 1976-2005 baseline period (BL). Projections indicate significant increase in Tmax (0.7-4.7 °C) and Tmin (0.7-5.1 °C) in NF, DF and VDF periods under the four RCP scenarios at the ten groundnut growing locations. Higher percent increase of the number of generations of S. litura was predicted to occur in VDF (6-38%) over baseline, followed by DF (5-22%) and NF (4-9%) periods with reduction of generation time (5-26%) across the four RCP scenarios. Reduction of crop duration was higher (12-22 days) in long duration groundnut than in medium and short duration groundnut. Decrease in crop duration was higher in VDF (12.1-20.8 days) than DF (8.26-13.15 days) and NF (4.46-6.15 days) climate change periods under RCP 8.5 scenario. Increase in number of generations of S. litura was predicted even with altered crop duration of groundnut. Among locations, more number of generations of S. litura with reduced generation time are likely at Vridhachalam and Tirupathi locations. Geographical location (74-77%) and climate period (15-19%), together explained over 90 percent of the total variation in the number of generations and generation time of S. litura. These findings suggest that the incidence of S. litura on groundnut could be higher in future.
    MeSH term(s) Animals ; Arachis/parasitology ; Climate Change ; Host-Parasite Interactions ; Models, Theoretical ; Spodoptera/physiology ; Temperature
    Language English
    Publishing date 2020-10-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 1498364-3
    ISSN 1879-0992 ; 0306-4565
    ISSN (online) 1879-0992
    ISSN 0306-4565
    DOI 10.1016/j.jtherbio.2020.102749
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Pest scenario of Spodoptera litura (Fab.) on groundnut under representative concentration pathways (RCPs) based climate change scenarios

    Srinivasa Rao, M / Rama Rao, C.A / Sreelakshmi, P / Islam, Adlul / Subba Rao, A.V.M / Ravindra Chary, G / Bhaskar, S

    Journal of thermal biology. 2020 Dec., v. 94

    2020  

    Abstract: Multi-model ensemble of Maximum (Tmax) and Minimum (Tmin) temperature data of four Representative Concentration Pathways viz., RCP 2.6, RCP 4.5, RCP 6.0 and RCP 8.5 of Coupled Model Intercomparison Project 5 (CMIP5) models were generated for ten major ... ...

    Abstract Multi-model ensemble of Maximum (Tmax) and Minimum (Tmin) temperature data of four Representative Concentration Pathways viz., RCP 2.6, RCP 4.5, RCP 6.0 and RCP 8.5 of Coupled Model Intercomparison Project 5 (CMIP5) models were generated for ten major groundnut growing locations of the India to predict the number of generations of Spodoptera litura (Fab.) using Growing Degree Days approach during three future climate viz., Near (NF), Distant (DF) and Very Distant (VDF) periods and were compared over 1976–2005 baseline period (BL). Projections indicate significant increase in Tmax (0.7–4.7 °C) and Tmin (0.7–5.1 °C) in NF, DF and VDF periods under the four RCP scenarios at the ten groundnut growing locations. Higher percent increase of the number of generations of S. litura was predicted to occur in VDF (6–38%) over baseline, followed by DF (5–22%) and NF (4–9%) periods with reduction of generation time (5–26%) across the four RCP scenarios. Reduction of crop duration was higher (12–22 days) in long duration groundnut than in medium and short duration groundnut. Decrease in crop duration was higher in VDF (12.1–20.8 days) than DF (8.26–13.15 days) and NF (4.46–6.15 days) climate change periods under RCP 8.5 scenario. Increase in number of generations of S. litura was predicted even with altered crop duration of groundnut. Among locations, more number of generations of S. litura with reduced generation time are likely at Vridhachalam and Tirupathi locations. Geographical location (74–77%) and climate period (15–19%), together explained over 90 percent of the total variation in the number of generations and generation time of S. litura. These findings suggest that the incidence of S. litura on groundnut could be higher in future.
    Keywords Spodoptera litura ; climate ; climate change ; models ; peanuts ; pests ; temperature ; India
    Language English
    Dates of publication 2020-12
    Publishing place Elsevier Ltd
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 1498364-3
    ISSN 1879-0992 ; 0306-4565
    ISSN (online) 1879-0992
    ISSN 0306-4565
    DOI 10.1016/j.jtherbio.2020.102749
    Database NAL-Catalogue (AGRICOLA)

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  5. Article: Response of multiple generations of semilooper, Achaea janata feeding on castor to elevated CO2.

    Rao, M Srinivasa / Srinivas, K / Vanaja, M / Manimanjari, D / Rama Rao, C A / Venkateswarlu, B

    Journal of environmental biology

    2013  Volume 34, Issue 5, Page(s) 877–883

    Abstract: The growth, development and consumption of four successive generations of semilooper, Achaea janato reared on castor (Ricinus communis L.) foliage grown under elevated carbon dioxide (550 and 700 parts per million ) concentrations in open top chambers ... ...

    Abstract The growth, development and consumption of four successive generations of semilooper, Achaea janato reared on castor (Ricinus communis L.) foliage grown under elevated carbon dioxide (550 and 700 parts per million ) concentrations in open top chambers were estimated at Hyderabad, India. Significantly lower leaf nitrogen, higher carbon, higher relative proportion of carbon to nitrogen (C: N) and higher polyphenols expressed in terms of tannic acid equivalents were observed in castor foliage under elevated CO2 levels. Significant influence on life history parameters of A. jonata viz., longer larval duration, increased larval survival rates and differential pupal weights in successive four generations were observed under elevated over ambient CO2 levels. The consumption per larva under elevated CO2 increased from first to fourth generation. An increase in approximate digestibility and relative consumption rate, decreased efficiency of conversion of ingested food and digested food and relative growth rate of the four generations under elevated CO2 levels was noticed. Potential population increase index was lower for successive generations under both elevated CO, over ambient. The present findings indicated that elevated CO2 levels significantly alter the quality of castor foliage resulting in higher consumption and better assimilation by larvae, slower growth and longer time to pupation besides producing less fecund adults over generations.
    MeSH term(s) Animals ; Carbon Dioxide/metabolism ; Herbivory ; Larva/growth & development ; Larva/physiology ; Moths/growth & development ; Moths/physiology ; Plant Leaves/physiology ; Population Growth ; Pupa/growth & development ; Pupa/physiology ; Ricinus/physiology
    Chemical Substances Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2013-09
    Publishing country India
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 0254-8704
    ISSN 0254-8704
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Temperature- and CO2-dependent life table parameters of Spodoptera litura (Noctuidae: Lepidoptera) on sunflower and prediction of pest scenarios.

    Manimanjari, D / Srinivasa Rao, M / Swathi, P / Rama Rao, C A / Vanaja, M / Maheswari, M

    Journal of insect science (Online)

    2014  Volume 14

    Abstract: Predicted increase in temperature and atmospheric CO2 concentration will influence the growth of crop plants and phytophagous insects. The present study, conducted at the Central Research Institute for Dryland Agriculture, Hyderabad, India, aimed at (1) ... ...

    Abstract Predicted increase in temperature and atmospheric CO2 concentration will influence the growth of crop plants and phytophagous insects. The present study, conducted at the Central Research Institute for Dryland Agriculture, Hyderabad, India, aimed at (1) construction of life tables at six constant temperatures viz., 20, 25, 27, 30, 33, and 35 ± 0.5 °C for Spodoptera litura (Fabricius) (Noctuidae: Lepidoptera) reared on sunflower (Helianthus annus L.) grown under ambient and elevated CO2 (eCO2) (550 ppm) concentration in open top chambers and (2) prediction of the pest status in near future (NF) and distant future (DF) climate change scenarios at major sunflower growing locations of India. Significantly lower leaf nitrogen, higher carbon and higher relative proportion of carbon to nitrogen (C:N) were observed in sunflower foliage grown under eCO2 over ambient. Feeding trials conducted on sunflower foliage obtained from two CO2 conditions showed that the developmental time of S. litura (Egg to adult) declined with increase in temperature and was more evident at eCO2. Finite (λ) and intrinsic rates of increase (r(m)), net reproductive rate (Ro), mean generation time, (T) and doubling time (DT) of S. litura increased significantly with temperature up to 27-30 °C and declined with further increase in temperature. Reduction of 'T' was observed from maximum value of 58 d at 20 °C to minimum of 24.9 d at 35 °C. The DT of population was higher (5.88 d) at 20 °C and lower (3.05 d) at 30 °C temperature of eCO2. The data on these life table parameters were plotted against temperature and two nonlinear models were developed separately for each of the CO2 conditions for predicting the pest scenarios. The NF and DF scenarios temperature data of four sunflower growing locations in India is based on PRECIS A1B emission scenario. It was predicted that increased 'rm', 'λ', and 'Ro' and reduced 'T' would occur during NF and DF scenario over present period at all locations. The present results indicate that temperature and CO2 are vital in influencing the population growth of S. litura and pest incidence may possibly be higher in the future.
    MeSH term(s) Animals ; Carbon Dioxide/pharmacology ; Climate Change ; Helianthus/chemistry ; Helianthus/drug effects ; India ; Life Cycle Stages/drug effects ; Plant Leaves/chemistry ; Plant Leaves/drug effects ; Spodoptera/drug effects ; Spodoptera/growth & development ; Spodoptera/physiology ; Temperature
    Chemical Substances Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2014
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2049098-7
    ISSN 1536-2442 ; 1536-2442
    ISSN (online) 1536-2442
    ISSN 1536-2442
    DOI 10.1093/jisesa/ieu159
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Improving dairy production in India's rainfed agroecosystem: Constraints and strategies

    Misra, A.K / Rama Rao, C.A / Subrahmanyam, K.V / Ramakrishna, Y.S

    Outlook on agriculture. 2009 Sept., v. 38, no. 3

    2009  

    Keywords rain ; agroecosystems ; dairy industry ; rural development ; feeds ; environmental policy ; farmers' attitudes ; India
    Language English
    Dates of publication 2009-09
    Size p. 284-292.
    Document type Article
    ZDB-ID 417465-3
    ISSN 0030-7270
    ISSN 0030-7270
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Impact of elevated CO₂ on tobacco caterpillar, Spodoptera litura on peanut, Arachis hypogea.

    Srinivasa Rao, M / Manimanjari, D / Vanaja, M / Rama Rao, C A / Srinivas, K / Rao, V U M / Venkateswarlu, B

    Journal of insect science (Online)

    2013  Volume 12, Page(s) 103

    Abstract: If the carbon dioxide (CO(2)) concentration in the atmosphere changes in the future, as predicted, it could influence crops and insect pests. The growth and development of the tobacco caterpillar, Spodoptera litura (Fabricius) (Noctuidae: Lepidoptera), ... ...

    Abstract If the carbon dioxide (CO(2)) concentration in the atmosphere changes in the future, as predicted, it could influence crops and insect pests. The growth and development of the tobacco caterpillar, Spodoptera litura (Fabricius) (Noctuidae: Lepidoptera), reared on peanut (Arachis hypogea L.) foliage grown under elevated CO(2) (550 ppm and 700 ppm) concentrations in open top chambers at Central Research Institute for Dryland Agriculture, Hyderabad, India, were examined in this study. Significantly lower leaf nitrogen, higher carbon, higher relative proportion of carbon to nitrogen and higher polyphenols content expressed in terms of tannic acid equivalents were observed in the peanut foliage grown under elevated CO(2) levels. Substantial influence of elevated CO(2) on S. litura was noticed, such as longer larval duration, higher larval weights, and increased consumption of peanut foliage by S. litura larvae under elevated CO(2) compared with ambient CO(2). Relative consumption rate was significantly higher for S. litura larva fed plants grown at 550 and 700 ppm than for larvae fed plants grown at ambient condition. Decreased efficiency of conversion of ingested food, decreased efficiency of conversion of digested food, and decreased relative growth rate of larvae was observed under elevated CO(2). The present results indicate that elevated CO(2) levels altered the quality of the peanut foliage, resulting in higher consumption, lower digestive efficiency, slower growth, and longer time to pupation (one day more than ambient).
    MeSH term(s) Analysis of Variance ; Animals ; Arachis/drug effects ; Arachis/growth & development ; Carbon Dioxide/pharmacology ; Herbivory ; India ; Insect Control ; Larva/physiology ; Plant Leaves/drug effects ; Plant Leaves/growth & development ; Spectrophotometry ; Spodoptera/drug effects ; Spodoptera/physiology
    Chemical Substances Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2013-02-25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2049098-7
    ISSN 1536-2442 ; 1536-2442
    ISSN (online) 1536-2442
    ISSN 1536-2442
    DOI 10.1673/031.012.10301
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Adoption, impact and discontinuance of integrated pest management technologies for pigeon pea in South India

    Rama Rao, C.A / Srinivasa Rao, M / Srinivas, K / Patibanda, A.K / Sudhakar, C

    Outlook on agriculture. 2011 Sept., v. 40, no. 3

    2011  

    Abstract: The adoption and impact of integrated pest management (IPM) were examined for pigeon pea cultivation in Andhra Pradesh, India. Summer ploughing and spraying of Neem Seed Kernel Extract (NSKE) were the most regularly adopted components of IPM for pigeon ... ...

    Abstract The adoption and impact of integrated pest management (IPM) were examined for pigeon pea cultivation in Andhra Pradesh, India. Summer ploughing and spraying of Neem Seed Kernel Extract (NSKE) were the most regularly adopted components of IPM for pigeon pea. A logistic regression analysis showed that age, education, participation in community-based organizations, ability to recognize the insect pests, and farm size influenced the decision to adopt IPM significantly. There were variations in the extent of IPM adoption among farmers. The adoption of IPM led to reduced use of insecticides and increased net returns. Furthermore, the use of new-generation insecticides led to a discontinuation of IPM practices.
    Keywords Azadirachta indica ; education ; farm size ; farmers ; insect pests ; insecticides ; integrated pest management ; pigeon peas ; plowing ; regression analysis ; seeds ; spraying ; India
    Language English
    Size p. 245-250.
    Document type Article
    ZDB-ID 417465-3
    ISSN 0030-7270
    ISSN 0030-7270
    Database NAL-Catalogue (AGRICOLA)

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  10. Article ; Online: Intercropping for management of insect pests of castor, Ricinus communis, in the semi-arid tropics of India.

    Rao, M Srinivasa / Rama Rao, C A / Srinivas, K / Pratibha, G / Vidya Sekhar, S M / Sree Vani, G / Venkateswarlu, B

    Journal of insect science (Online)

    2012  Volume 12, Page(s) 14

    Abstract: Intercropping is one of the important cultural practices in pest management and is based on the principle of reducing insect pests by increasing the diversity of an ecosystem. On-farm experiments were conducted in villages of semi-arid tropical (SAT) ... ...

    Abstract Intercropping is one of the important cultural practices in pest management and is based on the principle of reducing insect pests by increasing the diversity of an ecosystem. On-farm experiments were conducted in villages of semi-arid tropical (SAT) India to identify the appropriate combination of castor (Ricinus communis L.) (Malpighiales: Euphorbiaceae) and intercropping in relation to pest incidence. The diversity created by introducing cluster bean, cowpea, black gram, or groundnut as intercrops in castor (1:2 ratio proportions) resulted in reduction of incidence of insect pests, namely semilooper (Achaea janata L.), leaf hopper (Empoasca flavescens Fabricius), and shoot and capsule borer (Conogethes punctiferalis Guenee). A buildup of natural enemies (Microplitis, coccinellids, and spiders) of the major pests of castor was also observed in these intercropping systems and resulted in the reduction of insect pests. Further, these systems were more efficient agronomically and economically, and were thus more profitable than a castor monocrop.
    MeSH term(s) Animals ; Ricinus communis ; Crops, Agricultural/growth & development ; Desert Climate ; India ; Insect Control/methods ; Insecta
    Language English
    Publishing date 2012-07-25
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2049098-7
    ISSN 1536-2442 ; 1536-2442
    ISSN (online) 1536-2442
    ISSN 1536-2442
    DOI 10.1673/031.012.1401
    Database MEDical Literature Analysis and Retrieval System OnLINE

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