Influence of weather factors on sorghum earhead bug Calocoris angustatus Lethierry incidence     

N. Natarajan  P. C. Sundara Babu  S. Chelliah 《国际虫害防治杂志》2013,59(4):413-420

Abstract

Weather parameters during the same week and one, two, three or four weeks before were correlated with the population of earhead bug, Calocoris angustatus on different earhead stages of two hybrids, CSH 5 and K‐Tall, in main and ratoon crops. The weather factors in the different weeks contributing to the insect population varied with the stage of earhead, the hybrid and the nature of the crop (main or ratoon). In the main crop, the insect population at pre‐flowering, milky, dough and maturity stage was influenced by weather parameters one week before, the same, two and three weeks before respectively. Morning relative humidity was important in both hybrids at all stages, with a few exceptions. In the ratoon crop, the pre‐flowering and maturity stage populations were influenced by the weather parameters of the same week. The populations at milky and maturity stage were influenced by parameters four weeks and one week before the observations respectively. The factors influencing the population on CSH 5 and K‐Tall varied. In most cases morning relative humidity had a positive influence.  相似文献   

Deployment of wild relatives for genetic improvement in rice (Oryza sativa)     

Kiran B. Gaikwad  Naveen Singh  Parampreet Kaur  Sushma Rani  Prashanth Babu H  Kuldeep Singh 《Plant Breeding》2021,140(1):23-52

Rice is one of the most important crops in the world. The wild species of rice are expected to have novel beneficial alleles that have been lost from cultivated rice during the process of domestication. Therefore, wild species could be the potential source to induce lost genetic diversity in cultivated rice. Serving as an important reservoir of novel genes/QTLs, wild species, in general, are better adapted to different ecologies and can tolerate many biotic and abiotic stresses. Despite that, only a few wild species are studied and extensive characterization both at the molecular and morphological level is yet to be achieved. Several agronomically important genes/QTLs for improving biotic and abiotic stresses, resistance, productivity and grain quality traits were identified from AA genome donor wild species and were tagged with breeder friendly molecular markers for their transfer to elite genetic backgrounds. The present review provides information on the important wild rice species harbouring genes/QTLs for agriculturally important traits and their successful utilization in rice breeding programmes.  相似文献   

Analysis of diversity and distribution of <Emphasis Type="Italic">Jatropha curcas</Emphasis> L. germplasm using Geographic Information System (DIVA-GIS)     

N. Sunil  N. Sivaraj  K. Anitha  Babu Abraham  Vinod Kumar  E. Sudhir  M. Vanaja  K. S. Varaprasad 《Genetic Resources and Crop Evolution》2009,56(1):115-119

Jatropha curcas L., an important biodiesel plant, has been studied for its distribution and diversity in south east coastal zone of India using DIVA-GIS. The Grid maps were generated on the distribution pattern, plant height, number of primary branches, collar length, number of fruits per cluster and oil content. Flowering in the collected accessions were grouped in to very early (35%), early (29%), medium duration (10%), late (20%), and very late (6%) types. Analysis for richness using rarefaction method of DIVA-GIS showed that Ranga Reddy district of Andhra Pradesh is the potential area for germplasm with high oil content. The present study revealed that diverse germplasm accessions of J. curcas are distributed all over the south east coastal zone and enabled us to find out gaps in collection and diversity richness from SEC zone of India for conservation.  相似文献   

Release and Sorption Pattern of Monosilicic Acid from Silicon Fertilizers in Different Soils of Louisiana: A Laboratory Incubation Study     

Tapasya Babu  Lawrence Datnoff  John Yzenas  Kanchan Maiti 《Communications in Soil Science and Plant Analysis》2016,47(12):1559-1577

The amount of monosilicic acid (H₄SiO₄), which is the plant-available form of silicon (Si), released from fertilizers can be influenced by Si source and soil properties. A series of laboratory experiments were conducted using six soil series from Louisiana to document the differences in the release characteristics of H₄SiO₄ from wollastonite and slag. Monosilicic acid in solution released from slag declined with time while wollastonite consistently increased its concentration across all soil suspensions well above 40 µg mL^?1. Among these soil series, soils high in organic matter and clay were seen to have maximum percent sorption (up to 79%) with minimum polymerization of H₄SiO₄. The presence of ions like aluminum (Al) and magnesium (Mg) enhanced the process of H₄SiO₄ polymerization, which led to a decrease in H₄SiO₄ concentration in solution. Evident relationships were observed between H₄SiO₄ concentration in solution with added Si sources and sorbed quantity from soil solutions.  相似文献   

Micronutrient enrichment mediated by plant-microbe interactions and rice cultivation practices     

Anurup Adak  Santosh Babu  Ngangom Bidyarani  Shikha Verma  Madan Pal 《Journal of plant nutrition》2016,39(9):1216-1232

A field experiment was conducted to evaluate the effect of different plant growth promoting microorganisms (PGPM) on micronutrient enrichment of rice crops grown under conventional (flooded) and SRI (System of Rice Intensification) practices. Significant differences were recorded among treatments and cultivation practices in terms of soil microbial activity reflected in enhanced nutrient uptake, enzyme activity, and yield. The Anabaena-based biofilm inoculants were particularly superior under both methods of cultivation, leading to 13–46% enhancement of iron and 15-41% enhancement of zinc in rice grains over uninoculated controls. SRI was found to be superior in terms of enhancing the concentration of zinc, copper, iron, and manganese (Zn, Cu, Fe and Mn), particularly in grains, and significant in increasing the activity of defense- and pathogenesis- related enzymes and yield parameters. This study illustrates the utility of cyanobacteria-based inoculants for both methods of rice cultivation and their significant interactions with the plant, leading to micronutrient enrichment of rice grains. Such formulations can complement the current biofortification strategies and help in combating the problems of malnutrition globally.  相似文献   

Preliminary observations on effect of nano‐conjugated pheromones on Clarias batrachus (Linnaeus, 1758)     

Rupam Sharma  Mohd Ashraf Rather  Ramya Vijaykumar Leela  Himadri Saha  Suresh Babu Padinhate Purayil  Shabir Ahmad Dar  Sukham Munilkumar 《Aquaculture Research》2014,45(8):1415-1420

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The evaluation of endophyte toxin residues in sheep fat     

Finch SC  Fletcher LR  Babu JV 《New Zealand veterinary journal》2012,60(1):56-60

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Antifungal activity of some Himalayan medicinal plants and cultivated ornamental species     

Sharma RS  Mishra V  Singh R  Seth N  Babu CR 《Fitoterapia》2008,79(7-8):589-591

Extracts of roots of Rumex nepalensis, Berberis aristata, Arnebia benthamii, bark of Taxus wallichiana, Juglans regia and petals of Jacquinia ruscifolia were tested for their antifungal activity against twelve different fungal pathogens. Ethanolic extracts of R. nepalensis and J. ruscifolia extracts showed a broad spectrum of activity.  相似文献   

Larvicidal efficacy of Adiantobischrysene from Adiantum latifolium against Oryctes rhinoceros through disrupting metamorphosis and impeding microbial mediated digestion          下载免费PDF全文

Ravindrannair Pradeep Kumar  Anil John  Praveen Kumar  Kaleekkal Vasupillai Dinesh Babu  Dasammal Asirvadam Evans 《Pest management science》2018,74(8):1821-1828

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Optimum Fertilizer Phosphorus Requirement for Maximum Productivity under Rice–Rice and Rice–Sunflower Systems in Semi-Arid Alfisols     

Allipuram Srinivas  Pasupuleti Surendra Babu  Ghattamaraju Maruthi Sankar  Adusimilli Madhavi  Gollapalli Eswara Chandra Vidyasagar 《Communications in Soil Science and Plant Analysis》2018,49(12):1502-1521

A study was conducted at Hyderabad during 2009–11 to determine phosphorus (P) dose for rice–rice and rice–sunflower. Available P increased when 100% recommended P dose (RDP) was applied. P applied to rice gave at par yield under 100 or 75% RDP. In rice–rice, grain yield of 5668 and 5775 kg ha^?1 in kharif (5654 and 5760 kg ha^?1 in rabi) were attained with P@75 and 100% RDP. Kharif P residual effect in rabi affected rice yield. P@100/75% RDP in kharif and rabi gave grain of 5916/5973 and straw 6230/6673 kg ha^?1. P applied to sunflower revealed that yield was similar with 100 or 75% RDP. Sunflower yield was at par with P@100 or 75% RDP. 25% RDP in rice and sunflower may be reduced to attain similar yield of 100% RDP. In rice–rice, grain yield attained by 100% RDP in both seasons was 11.42t ha^?1 yr^?1, while 75% RDP gave yield of 11.45t ha^?1yr^?1.  相似文献