Browsing by Author "Balanagouda Patil"

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    ball copra
    (2021-10) Sumitha, S.; Maheswarappa, H.P.; Siddappa, R.; Balanagouda Patil
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    Control Efficiency and Yield Response of Chemical and Biological Treatments against Fruit Rot of Arecanut: A Network Meta-Analysis
    (2022) Balanagouda Patil; Shankarappa Sridhara; Hanumappa Narayanaswamy; Vinayaka Hegde; Ajay Kumar Mishra
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    Development and evaluation of fungicide-amended urea briquettes (FAUB’s) to combat fruit rot disease of arecanut: A farmers-friendly approach
    (2023) Balanagouda Patil; Hanumappa Narayanaswamy; Vinayaka Hegde; Shankarappa Sridhara; Thava Prakasa Pandiyan, R; Shivaji Hausrao Thube
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    Euwallacea perbrevis (Schedl, 1951) and associated novel fungal symbiont, Fusarium sp.: A potential cause of wilting in cocoa, Theobroma cacao in India
    (2024) Shivaji Hausrao Thube; R Thava Prakasa Pandian; Rajkumar; Merin Babu; Josephrajkumar, A.; Santhoshkumar P; B.J. Nirmal Kumara; Vinayaka Hegde; Balanagouda Patil; H. Rajashekara; T. Prabhulinga; Babasaheb B. F; Shailesh Gawande; Dipak Nagrale; M. Devindrappa; Rajesh, M.K.
    Cocoa is a commercially important beverage crop that faces new challenges in the context of climate change, which can alter pest and disease dynamics in cocoa plantations. In the Dakshina Kannada district of Karnataka, India, an abrupt increase in cocoa wilt was observed during the 2017–18 and 2018–19 seasons. Systematic examination of affected trees revealed consistent attacks of Euwallacea perbrevis (Schedl, 1951; Coleoptera: Curculionidae: Scolytinae). In-depth studies of the wilted trees revealed the association of the plant pathogenic fungus Fusarium sp. with Euwallacea perbrevis. The identity of the obtained pure culture from the insect and infected tree was confirmed as Fusarium sp. using amplification of ribosomal DNA, RNA polymerase II largest subunit (RPB1) and translation elongation factor 1 (Tef1) genes. Notably, this study reports a remarkable case of mutualistic association between ambrosia beetles and Fusarium sp., belonging to the Fusarium solani species complex (FSSC), rather than the Ambrosia Fusarium clade (AFC). This finding highlights the intriguing diversity of mutualistic relationships in nature and sheds new light on the complex interactions between organisms. The present study also investigated the impact of rainfall on the colonization and spread of the Euwallacea-Fusarium complex. The findings revealed that rainfall was identified as a predisposing factor for the incidence and spread of attacks. Additionally, the study conducted a comprehensive analysis of the modeling of Euwallacea-Fusarium complex spread over a specific period of time.
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    Multi-gene phylogeny and phenotypic analyses revealed an association of different Colletotrichum species with inflorescence dieback and leaf spot of arecanut in India
    (2024) Prathibha, V.H.; Rajesh, M.K; Akshay Dinesh; Balanagouda Patil; Daliyamol; Nagaraja, N.R.; Rajkumar; Sabana, A.A.; K.P. Gangaraj; K.P. Thejasri; Sunil S. Gangurde; Vinayaka Hegde
    Arecanut is one of the economically important plantation crops. Among the various diseases, inflorescence dieback and leaf spot/blight diseases caused by Colletotrichum spp. have re-emerged as major factors impeding arecanut production in India in the last few years. To understand the Colletotrichum species complex in the arecanut system, we have characterized Colletotrichum spp. associated with inflorescence dieback and leaf spot/ blight of arecanut based on a combination of phenotypic, multi-locus (ITS, ACT, CHS-1, GAPDH, HIS3 and TUB2) phylogeny and pathogenicity studies. A total of 26 Colletotrichum isolates were obtained from arecanut inflorescence dieback (13 isolates) and leaf spot/blight (13 isolates) infected tissues collected from disease-endemic regions of Karnataka, Kerala and Tripura states of India. The combined multi-locus sequence analyses and a critical examination of phenotypic characters revealed the association of Colletotrichum aoteaora as a dominant species with arecanut inflorescence dieback disease. On the other hand, two Colletotrichum species, viz., C. siamense and C. fructicola, were distinctly associated with leaf spot/blight disease. All the Colletotrichum isolates studied were pathogenic to arecanut. Significant variations in lesion size were observed among the different species with cross-infection ability on inflorescence and leaves. This study represents the first comprehensive study of Colletotrichum spp. associated with arecanut inflorescence dieback and leaf spot/blight diseases. In addition, the study is the first record of C. aoteaora, C. siamense, and C. fructicola associated with the arecanut crop in this country. It provides valuable information for implementing effective IDM strategies against these diseases in India.
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    Multigene phylogeny and haplotype analysis reveals predominance of oomycetous fungus, Phytophthora meadii (McRae) associated with fruit rot disease of arecanut in India
    (2022) Balanagouda Patil; Vinayaka Hegde; Shankarappa Sridhara; Thava Prakasa Pandian, R.; Shivaji Hausrao Thube; Gangaraj Karyath Palliath; Sunil S. Gangurde; Prakash Kumar Jha
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    Spatial Distribution Patterns for Identifying Risk Areas Associated with False Smut Disease of Rice in Southern India
    (2022) Sharanabasav Huded; Devanna Pramesh; Amoghavarsha Chittaragi; Shankarappa Sridhara; Eranna Chidanandappa; Muthukapalli K. Prasannakumar; Channappa Manjunatha; Balanagouda Patil; Sandip Shil