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Agricultural and Biological Sciences >
Agronomy and Crop Science
International Journal of Plant Protection
Publisher:Dr. Rakesh Kumar Singh
Editor in chief:Dr. Ramjee Singh
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Estimation Of Losses Caused By Rice Leaf Folder, Cnaphalocrosis Medinalis Guen. (Lepidoptera: Pyralidae) On Paddy Crop At Jagdalpur (Chhattisgarh)
Author:Chandra Shekhar Netam* And A. K. Gupta
Volume: 10 | Issue no: 2-2017 | Pagination: 461-464
Studies on estimation of losses caused by rice leaf folder on variety swarna presented regression analysis revealed a non significant negative relation between damaged flag leaves and grain yield in natural infestation (r2 = 0.186) while, a significant negative relation observed in augmented condition (r2 = 0.739).
Biofumigation: A Control Method For The Soil-Borne Diseases
Author:J. N. Srivastava* And Abhijeet Ghatak
Volume: 10 | Issue no: 2-2017 | Pagination: 453-460
Status Of Microflora On Bt And Non - Bt Cotton
Author:S. N. Ambhore And B. G. Barhate
Volume: 10 | Issue no: 2-2017 | Pagination: 448-452
Transgenic Bt cotton expresses Cry1Ac protein from Bacillus thuringiensis. The diversity of ectophytic and endophytic fungi and bacteria in roots, stems and leaves from transgenic (Bt) and non transgenic (non Bt)cotton was evaluated during 30, 60 and 90 DAS to investigate possible non-target effects of genetically modified cotton on microbial communities. Total ten fungal and five bacterial organisms were isolated. This studies shows that the roots, stems and leaves of Bt and non Bt cotton plants harboured endophytes and ectophytes. Although the no.of endophytic and ectophytic species isolated from the two types of plant did not vary much. While Bt modifications had no effect on endophytes and ectophytes and it is seen from the observations that the Bt gene had not transferred from Bt plants to associated microflora. These results represent the first evaluation of the composition of endophytic and ectophytic fungi as well as bacteria associated with transgenic cotton plants. Also detection of Bt gene in associated microflora by using Bt Express strips.
Climate Resilient Technological Interventions To Ensure Food Security In Flood Affected Area ? An Experience From Nicra Village, Dhubri, Assam
Author:B. C. Deka1*, C. K. Deka1, P. Das1, J. Goswami2 And H. C. Bhattacharryya2
Volume: 10 | Issue no: 2-2017 | Pagination: 442-447
The study was conducted in villages of Dhubri district in Assam under National Innovation on Climate Resilient Agriculture (NICRA) project implemented by Krishi Vigyan Kendra, Dhubri during 2013 to 2015. The villages are situated under Bilasipara sub-division in the district ?Dhubri? of Assam, India on 26° 15. 425´ to 26° 16.570´ N latitude and 90° 14.034´ to 90° 18.040´ E longitude at an elevation of 128 ft from mean sea level. Recurrent floods has been the principal constraints in food production in these villages affecting mainly winter (Kharif) rice during the growing season as well as summer rice (Boro and Ahu) at the time of maturity. The prevailing weather patterns of the area were observed to have a strong bearing on the occurrence, intensity and magnitude of floods. About 71 per cent of total rainfall occurs during monsoon period (June to September), the winter being virtually dry leaving little scope for growing any Rabi crop. To ensure rice production to climatic variability leading to flood, site specific climate resilient technologies such as staggered planting rice variety ?Gitesh?, flood escaping, short duration HYV rice ?Luit? for post and pre-flood situation, submergence tolerant rice variety ?Swarna Sub 1? and mid duration HYV of rice ?Joymati? during preflood situation were tested and demonstrated in the project villages. It was necessary to observe the performance of these varieties to the climatic vulnerability as well as farmer?s acceptability. The average yield of the rice variety ?Gitesh? (45 days aged seedlings), ?Luit? (post flood situation), ?Luit? (pre-flood situation), ?Swarna Sub 1? and ?Jomati? were found to be 40 to 42, 26.3 to 36, 23.35 to 31.39, 33 to 45 and 42.37 to 50.76 q per hectare, respectively. As a result of the study and demonstration to endure recurrent flood and climatic variability, the newly introduced winter rice varieties, Gitesh has spread over the highest area in the project villages (90.00%) followed by ?Swarna Sub 1? (75.00 %) and ?Luit? (66.67 %) due to flexibility in seedling age facilitating delayed transplanting, submergence tolerance upto 14 days and allowance for transplanting after recession of flood, respectively.
Seasonal Incidence Of Maize Stem Borer-Record Of New Stage And Site Of Oviposition Of Sesamia Inferens
Author:M. Anuradha*, M. Lavkumar Reddy And D. Sreelatha
Volume: 10 | Issue no: 2-2017 | Pagination: 438-441
A field experiment on seasonal incidence of stem borers in corn was conducted at Maize Research Centre, Rajendranagar, Hyderabad. Undertaking sowings at monthly intervals from Jan 2013 to Dec 2013 in an area of 150 m2 as a replicated trial. DHM 117 hybrid was sown in ridge and furrow method at 75x20 cm spacing. Random destructive sampling was done twice at 30 and 60 DAG @ 4 plants per replication to quantify the genera wise stem borer larval population and also stem tunneling. Observations on stem borer incidence and yield were recorded. Data was subjected to arcsine and square root transformation and two way analysis was conducted. It is evident from the results that among the monthly sowings, September and February are subjected to severe stem borer attack, however, low yields are observed in summer. Hence, it is advisable to take up sowings in July during Kharif and in November during Rabi to obtain maximum yields with low stem borer incidence.
A Survey Of Farmers Knowledge And Management Practices Adopted In Cruciferous Vegetables In Kanpur, Central Uttar Pradesh
Author:Neelam Yadav* And Neerja Agrawal
Volume: 10 | Issue no: 2-2017 | Pagination: 434-437
The survey was conducted during October 2015 to January 2016 among the farmers of four villages, viz., Bithoor, Pukharayan, Ghatampur and Kalyanpur in Kanpur region, Central Uttar Pradesh. The study revealed that maximum 75 per cent farmers were engaged in cultivation of cruciferous vegetables viz., cauliflower, cabbage, radish, turnip with other crops in Bithoor, Kalyanpur and Ghatampur whereas only 60 per cent were cultivating these crops in Pukhrayan. Out of total respondents of farmers from Kanpur districts, 82 per cent farmers were using chemical pesticides (mainly carabryl 50WP, Malathion 50EC, Cartap hydrochloride 0.5 % and dichlorvos 100EC) whereas 16 per cent used indigenous methods ( chili powder spray, fly ash powder spray) along with chemical pesticides and 2 per cent were using biopesticides (azadirachtin, 5% ). This paper explores potentials and limitations of different approaches to study pesticide use in agriculture from the farmers? perspective. In contrast to the reductionist and mono-disciplinary approaches often adopted, this paper calls for integrative methodological approaches to provide a realistic and thorough understanding of the farmers? perspective on pesticide in four sites of Kanpur.
Evaluation Of Indigenous Technical Knowledge (Itk) Against Rice Leaf Folder, Cnaphalocrosis Medinalis (Guen.) At Southern Parts Of Chhattisgarh, India
Author:Chandra Shekhar Netam*, A.K. Gupta And Chandramani Sahu
Volume: 10 | Issue no: 2-2017 | Pagination: 429-433
Among various factors responsible for low yield, losses due to insect-pests attack are of prime importance. Paddy crop is attacked by more than hundred insect species, of which fifteen are of major economic importance.Among these insect-pests, leaf folder, Cnaphalocrosis medinalis Guen is noticed as regular insect-pest at baster plateau zone. Present studies on evaluation of efficacy of indigenous technology against leaf folder. The results revealed that significantly least infestation (3.16%) with the highest grain yield, gross return and CB ratio of 38.32 q/ha, Rs. 50,199.20 and 2.39, respectively recorded in standard check chemical i.e. chlorpyriphos 20 EC. Among the ITK components, Neem had least leaf infestation (9.52%) with highest grain yield (31.52 q/ ha), maximum gross return (Rs. 41,291.20) and maximum CB ratio (2.05).
Spatial Variability Of Mungbean Yellow Mosaic Virus (Mymv) In North Eastern Karnataka
Author:Meghashree Meti1, Mallikarjun Kenganal1*, Gururaj Sunkad1, D.S. Aswathanarayana1 And U. K. Shanwad2
Volume: 10 | Issue no: 2-2017 | Pagination: 420-428
Mungbean a protein rich legume has high demand but, supply is hindered due to poor production and productivity due to mungbean yellow mosaic virus (MYMV) disease. The North Eastern Karnataka being the pulse bowl of the state annually suffers from MYMV incidence. In order to control this whitefly transmitted virus, knowledge and information about its distribution across the region is essential to formulate the strategies of management. In the present study a roving survey was undertaken to know the incidence and present status of MYMV in mungbean among the six districts of North Eastern Karnataka (NEK) region viz., Bellary, Bidar, Koppal, Kalaburgi, Raichur and Yadgir during Kharif 2016, when the crop was at 30 to 45 days old. The GPS position and MYMV incidence in each location were recorded and used to develop GIS map to know the spatial distribution of MYMV in different talukas of six districts. The results showed varied incidence of MYMV across many locations. Highest disease incidence was recorded at Koppal district with 33.33 per cent followed by Bellary (21.45 %), Raichur (19.70 %), Kalaburgi (17.44 %) and Yadgir (15.76 %) districts. The least disease incidence was noticed at Bidar district (5.66%). Higher MYMV incidence in Koppal was mainly due to favourable weather for multiplication and survival of whitefly population which spreads the virus. The virus inoculum in summer crop and weed hosts were found acting as source of inoculum. Findings of the study revealed that higher incidence in Koppal would provide suitable disease pressure for screening of genotypes developed against the MYMV infection and also develop management strategies in each district based on the disease incidences recorded.
Effect Of Weather Parameters On Yellow Rust Incidence Of Wheat Under Different Growing Environment
Author:Sarabjot Kaur Sandhu* And L. K. Dhaliwal
Volume: 10 | Issue no: 2-2017 | Pagination: 415-419
Yellow rust is the major wheat disease and is influenced by prevailing weather conditions. Field experiment was conducted to investigate the effect of weather parameters on yellow rust incidence under different growing environments. Wheat varieties HD 2967, PBW 550 and PBW 343 were sown under three row spacing viz.,15 cm, 22.5 cm and 30 cm. Yellow rust incidence was recorded at weekly intervals. Disease incidence was higher (100%) during Rabi 2012-13 as compared to 2013-14 (90%). Among different row spacing the disease incidence was maximum (100 %) in 15 cm row spacing followed by 22.5 cm and minimum in 30 cm spacing during both the years. Among three varieties HD 2967 was highly resistant to yellow rust. During both the years maximum temperature, minimum temperature and sunshine hours were positively correlated whereas morning and evening relative humidity were negatively correlated with yellow rust incidence. Highly significant value of R2 (0.91 and 0.92) was foundwhen maximum meteorological parameters were combined in PBW 550 and PBW 343, respectively.
Assessment On Management Of Late Blight In Potato Incited By Phytophthora Infestans
Author:B. Manjunath1*, Devaraja2, K.N. Srinivasappa1, B.G. Vasanthi1 And Manjunath Gowda2
Volume: 10 | Issue no: 2-2017 | Pagination: 410-414
Late blight incited by Phytophthora infestans is one of the most widely spread and economically important disease of potato. The present investigation was carried out to evaluate the efficacy of different fungicides and biocontrol agents for the management of the disease. Soil application of Trichoderma viride and Pseudomonas fluorescens 15 days before transplanting followed by prophylactic spray of Mancozeb (0.25%) 35 days after transplanting was found effective. Three sprays of fungicides viz., Fenamidone + Mancozeb (0.3%), Iprovalicarb + Propineb (0.3%) and Dimethomorph (0.1%) + Mancozeb (0.2%) sprayed at regular intervals of seventh, ninth and eleventh weeks depending on the disease severity was found very effective in managing the disease.
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