Browsing by Author "Vinayaka Hegde"
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Item Arecanut diseases and their Management(2016) Chowdappa, P.; Vinayaka Hegde; Chaithra, M; Thava Prakasa Pandian, RItem Coconut community in India -a profile(CPCRI, 2001-09) Arulraj, S.; Rajagopal, V.; Sairam, C.V.; Thamban, C.; Anithakumari, P.; Dhanapal, R.; Bosco, S.J.D.; Subaharan, K.; Naresh Kumar, S.; George V. Thomas; Vinayaka Hegde; Kumaran, P.M.; Parthasarathy, V.A.Item Coconut: Maladies and Remedies(2018) Rohini Iyer; Gunasekharan, M.; Vinayaka HegdeItem 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 MishraItem Data of 16S rRNA gene amplicon-based metagenomic signatures of arecanut rhizosphere soils in Yellow Leaf Disease (YLD) endemic region of India(2021) Paulraj, S.; Ravi Bhat; Rajesh, M.K.; Ramesh, S.V.; Priya, U.K; Thava Prakasa Pandian, R.; Vinayaka Hegde; Chowdappa, P.Item 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 ThubeItem Development of rapid, efficient and cost effective screening technique for testing arecanut against Phytophthora meadii incitant of fruit rot disease(2024) Prathibha, P.S.; Nagaraja, N.R.; Rajesh, M.K.; Daliyamol; K. P. Thejasri; Rajkumar; Vinayaka Hegde; Uchoi AnokTo accelerate identification of disease resistant arecanut germplasm or hybrids against Phytoph- thora , it is very much imperative to develop bioassays which could differentiate resistant and susceptible cultivars efficiently. Here, a cost effective and rapid technique, called the “Detached Leaf Assay ”, was developed to identify resistant germplasm at the seedling stage itself. Zoospore production in highly virulent Phytophthora meadii (P19) was standardized by incubating under a 12 hours light and dark regime. Zoospore suspension was adjusted to 105 spores ml-1 in Petri plates. Subsequently, surface sterilized arecanut leaves were floated in zoospore suspension and incubated at temperature of 24 ± 1 °C. Disease symptoms, including water-soaked lesions, were recorded three days after inoculation. Infection lesion increased from 1 to 7.3 cm2 . The pathogen was re-isolated and confirmed with the original culture. The assay was successfully validated to screen arecanut accessions, wild types and hybrids against P. meadii . This technique is the first to be developed, and it is simple, cost-effective, and faster. It also provides consistent infection and could be effectively utilized to screen arecanut germplasm or hybrids against P. meadii in the seedling stage itself.Item Diagnosis of invasive whitefly species co-occurring on coconut(2020-10) Joseph Rajkumar, A.; Chandrika Mohan; Merin Babu; Prathibha, P.S.; Vinayaka HegdeItem Differentiation of Phytophthora species associated with plantation crops using PCR and high-resolution melting curve analysis(2018) Prathibha, V.H.; Vinayaka Hegde; Sharadraj, K.M; Rajesh, M.K; Rachana, K.E.; Chowdappa, PItem Discovery of a sooty mould scavenging beetle, Leiochrinus nilgirianus Kaszab (Coleoptera: Tenebrionidae) on coconut palms infested by the invasive rugose spiralling whitefly, Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae)(2018) Josephrajkumar, A.; Chandrika Mohan; Poorani, J; Merin Babu; Daliyamol; Krishnakumar, V.; Vinayaka Hegde; Chowdappa, P.Item Diseases(2017) Vinayaka Hegde; Prathibha, V.H.; Chowdappa, P.Item Enhancing farmer's income by growing disease-free coconut(2017) Vinayaka Hegde; Prathibha, V.H.; Chowdappa, P.Item 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.Item Evaluation of a native isolate of Metarhizium anisopliae (Metschn.) Sorokin TMBMA1 against tea mosquito bug, Helopeltis theivora infesting cocoa (Theobroma cacao L.)(2022) Shivaji Hausrao Thube; Thavaprakaash. N; Merin Babu; Josephrajkumar, A.; Priyank Hanuman Mhatre; P. Santhosh Kumar; B.J. Nirmal Kumar; Vinayaka Hegde; Satish Namdeo ChavanItem Evaluation of Combinatorial Capacity of Coconut and Cocoa Plant Growth Promoting Rhizobacteria (PGPR) with Biocontrol Agent Trichoderma harzianum(2018) Khadeejath Rajeela, T.H.; Alka Gupta; Murali Gopal; Vinayaka Hegde; George V. ThomasItem Evaluation of locally available substrates for mass production of Trichoderma(2015-08) Prathibha, V.H.; Sharadraj, K.M.; Nidhina, K.; Vinayaka HegdeItem FIRST RECORD OF THE INVASIVE NEOTROPICAL AMBROSIA BEETLE EUPLATYPUS PARALLELUS (FABRICIUS, 1801) COLEOPTERA: CURCULIONIDAE: PLATYPODINAE) INFESTING ARECANUT IN KARNATAKA, INDIA(2018) Shivaji Hausrao Thube; Chandrika Mohan; RTP Pandian; Saneera, E.K; Sannagoudra, H.M; Vinayaka Hegde; Chowdappa, PItem FIRST REPORT OF LASIODIPLODIA THEOBROMAE CAUSING APPLE AND IMMATURE NUT ROTS ON CASHEW IN INDIA(2017) Prathibha, V.H.; Vinayaka Hegde; Sharadraj, K.M; Chowdappa, P.Item First report on the association of ‘Candidatus Phytoplasma asteris’ with lethal wilt disease of coconut (Cocos nucifera L.) in India(2020) Merin Babu; Thangeswari, S.; Joseph Rajkumar, A.; Krishnakumar, V.; Karthikeyan, A.; Selvamani, V.; Daliyamol; Vinayaka Hegde; Maheswarappa, H.P.; Anitha KarunItem Global scenario on phytoplasmal diseases in palms(2022) Vinayaka Hegde; Merin Babu; Josephrajkumar, A.
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