291 research outputs found
A phylogenetic reappraisal of Excipulariopsis narsapurensis in Wiesneriomycetaceae, Tubeufiales
No full textParaparath, Sruthi O., Rajkumar, Sakshi, Rajeshkumar, Kunhiraman C., Verma, Rajnish K., Gautam, Ajay Kumar, Narula, Bhavna, Wijayawardene, Nalin N., Tibpromma, Saowaluck, Karunarathna, Samantha C. (2023): A phylogenetic reappraisal of Excipulariopsis narsapurensis in Wiesneriomycetaceae, Tubeufiales. Phytotaxa 607 (5): 273-290, DOI: 10.11646/phytotaxa.607.5.2, URL: http://dx.doi.org/10.11646/phytotaxa.607.5.
Local developers, fragmented development and perils of governance
No full textThe incidence of land-grabbing by local developers, that leads to illegal colonies and unauthorised housing in the informal land markets of the National Capital Region, particularly in Gautam Buddha Nagar and Ghaziabad, is examined. The fieldwork reveals how developers exploit regulatory loopholes, collude with state actors, and leverage caste networks to gain control over land. This process fuels illegal colonies, marginalises lower-caste groups, and reshapes urban peripheries. The findings highlight the urgent need for governance reforms to curb speculative land dispossession and ensure equitable urban development in rapidly expanding Indian cities
Short Communication: Some additions to powdery mildews (Erysiphales: Fungi) of Northwestern Himalayas
No full textGautam AK, Avasthi S. 2017. Short Communication: Some additions to powdery mildews (Erysiphales: Fungi) of Northwestern Himalayas. Nusantara Bioscience 9: 52-56. During the regular mycological collections, between October to December 2015 in North-West Himalayas of Himachal Pradesh, four powdery mildews parasitic on higher plants were gathered. After study they were found to be Pseudoidium cryptolepidis on Cryptolepis buchanani, Erysiphe trifoliorum on Trifolium repentis, Podosphaera xanthii on Coreopsis lanceolata and Podosphaera euphorbiae-hirtae on Euphorbia hirta. All the powdery mildew fungi are additions to Himachal Pradesh as well as north-west Himalayas.</jats:p
Fungal metabolites as a natural source of herbicide: a novel approach of weed management: Ajay Kumar Singh* and Akhilesh Kumar Pandey Mycological Research Laboratory, Department of Biological Science Rani Durgawati University, Jabalpur-482001, Madhya Pradesh. India *Corresponding Author: Dr Ajay Kumar Singh [email protected]
No full textWeeds are undesirable vegetation directly or indirectly inferring with human welfare. Conventional methods of weed control have failed due to one or other reason. Herbicide-resistant weeds are the main problem in weed control due to the number of weed biotypes resistant to herbicides that constantly increases by the continuous use of the same products for years. Development of alternative weed control methods is needed to help decrease reliance on herbicide use. Biological weed control is an alternative option for weed problems, particularly in agriculture and forestry. It is based on the use of natural enemies, particularly insects and pathogens to control weeds, as a sustainable, low cost and more environmentally acceptable method of weed control. One of the approaches to biological weed control using fungal phytotoxin applied in similar ways to conventional herbicides. Fungal phytotoxins are natural secondary metabolites produced by plant pathogenic fungi during host–pathogen interactions. They have received considerable particular attention for elucidating disease etiology, and consequently to design strategies for disease control. Due to wide differences in their chemical structures, these toxic metabolites have different ecological and environmental roles and mechanisms of action. This review aims at summarizing the studies on the possible use of fungal phytotoxin as a lucrative, novel source of secondary phytotoxic herbicidal compounds for management of broad spectrum, noxious and pernicious weeds
Hand-geometry recognition using entropy-based discretization
No full textAuthor name used in this publication: Ajay Kumar2006-2007 > Academic research: refereed > Publication in refereed journalVersion of RecordPublishedVoR allowe
Wiesneriomycetaceae
No full textKey to genera of <i>Wiesneriomycetaceae</i> <p>1. With setae at the edge of the sporodochium or basal stroma.............................................................................................................2</p> <p>1. Without setae at the base of synnemata, sporodochium or stroma.....................................................................................................5</p> <p>2. Conidia isthmosporous.......................................................................................................................................................................3</p> <p> 2. Conidia not isthmosporous, fusoid, brown, polar cells paler...................................................................................... <i>Excipulariopsis</i></p> <p>3. Conidia unbranched, hyaline..............................................................................................................................................................4</p> <p> 3. Conidia branched, pale brown..................................................................................................................................... <i>Phalangispora</i></p> <p> 4. Sporodochia elevated with setae connected at base; Conidia cylindrical.................................................................. <i>Wiesneriomyces</i></p> <p> 4. Sporodochia not elevated, setae not linked to sporodochia; Conidia subcylindrical......................................... <i>Parawiesneriomyces</i></p> <p>5. Conidia hyaline...................................................................................................................................................................................6</p> <p>5. Conidia coloured................................................................................................................................................................................7</p> <p> 6. Conidia aggregate in heads, narrowly fusiform to lanceolate, septate................................................................ <i>Pseudogliophragma</i></p> <p> 6. Conidia aggregate in heads, filiform, with an isthmus at the central septum tapered towards each end........................ <i>Setosynnema</i></p> <p> 7. Conidia pale to mid-brown, with three to five radiate arms................................................................................................ <i>Speiropsis</i></p> <p> 7. Conidia brown, without radiate arms, 1–4 to multi-septate, with dark brown band at the septa........................................ <i>Heveicola</i></p>Published as part of <i>Paraparath, Sruthi O., Rajkumar, Sakshi, Rajeshkumar, Kunhiraman C., Verma, Rajnish K., Gautam, Ajay Kumar, Narula, Bhavna, Wijayawardene, Nalin N., Tibpromma, Saowaluck & Karunarathna, Samantha C., 2023, A phylogenetic reappraisal of Excipulariopsis narsapurensis in Wiesneriomycetaceae, Tubeufiales, pp. 273-290 in Phytotaxa 607 (5)</i> on page 280, DOI: 10.11646/phytotaxa.607.5.2, <a href="http://zenodo.org/record/8248862">http://zenodo.org/record/8248862</a>
Fungi associated with Pistacia integerrima with a description of a new species and one new record from India
No full textPistacia integerrima is a deciduous tree species belonging to the family Anacardiaceae. The plant possesses numerous phytochemicals of ethno-medicinal importance. In a routine mycological survey carried out from July 2013 to June 2014, leaves of P. integerrima were found infected with fungi causing rust and blight diseases. The morphological and microscopic observations revealed three fungi, namely Skierka himalayensis, Pestalotiopsis sp., and Pileolaria pistaciae, which were found to cause rust and blight diseases. One new species of rust fungi, namely Skierka himalayensis sp. nov., and Pestalotiopsis sp. are reported for the first time from India. The detailed descriptions and illustrations of these three phytopathogenic fungi are provided in this paper
The impact of COVID-19 on petty landlords in Delhi, India: caste, gender and urban villages
No full textCOVID-19 presented unparalleled difficulties for financially disadvantaged renters, limiting their ability to pay for housing. The impact of this crisis on petty landlords, who often provide housing to these precarious renters, is unclear and requires investigation. Utilising data from a survey of 300 households, and focus group discussions (FGDs) with 100 petty landlords, primarily first-generation Scheduled Caste (SC) and Other Backward Class (OBC) owners, this case study examines the effects of the pandemic on petty landlords in urban villages in Delhi, India. The findings highlight the sedimentation of caste in informal rental market spaces: Firstly, it highlights the role of caste-based socio-economic factors in the emergence of petty landlords in relation to dominant caste landlords. Secondly, it examines the circumstances that led to financial strain among marginalised caste landlords during the pandemic and explores how their responses to this stress worsened existing housing challenges for vulnerable tenants. Thirdly, the study reveals that gender also played a significant role in shaping the experiences of petty landlords, with women outnumbering men as proxy landlords in this group. Lastly, the paper explores how state imposed eviction interventions brought the complexities of caste, class, gender and urban marginality to the forefront
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