Papers by Dr.Shamarao Jahagirdar
Karnataka Journal of Agricultural Sciences, 2010
Asian Agri-History, Nov 14, 2018
India has a treasure of indigenous knowledge concerning plant health developed and documented sev... more India has a treasure of indigenous knowledge concerning plant health developed and documented several centuries ago. The three major ancient texts interalia are: (i) Varahamihira's (505 CE) Brihat-Samhita, Part I Vriksshayurveda 1 , (ii) Chavundaraya's (1025 CE) Lokopakara Chapter 6 Vriksshayurveda 2 ; and (iii) Sarangadhara's (1363 CE) Vrikshayurveda 3. It is, however, to be noted that this knowledge was developed in the pest-disease scenario prevalent 10 to 15 centuries ago, during which time many of the current pests and diseases may not have
Journal of FARM SCIENCES, Mar 31, 2015
Journal of Experimental Zoology, India, 2019
Journal of entomology and zoology studies, 2020
Agriculture and horticultural crops are every year severely affected with insect pests and diseas... more Agriculture and horticultural crops are every year severely affected with insect pests and diseases. Hence, insecticides and fungicides have predominant role in crop protection sector of agriculture and horticulture. Hence screening of commercial insecticides for antifungal activity is very much essential to reduce cost of crop protection. Were evaluated ten commercial insecticides against fungal pathogens by following poison food technique. Among evaluated insecticides, Emamectin benzoate 5 SG (Proclaim) showed statistically superior antifungal activity with 100.00 per cent mycelial inhibition of Pythium aphanidermatum at 0.02% concentration followed by Profenofos 50 EC (90.97%) at 0.2% concentration. Among ten commercial insecticides were evaluated against Alternaria solani, Emamectin benzoate 5 SG (Proclaim) showed excellent antifungal activity with 100.00 per cent mycelial inhibition of A. solani at 0.02% concentration followed by Profenofos 50 EC (85.09%) and Chloropyriphos 20 EC (83.52%) at 0.2% concentration. The antibiotic streptocycline showed 53.33% and 63.52% mycelial inhibition of P. aphanidermatum and A. solani respectively at 0.05% concentration.
Mysore journal of agricultural sciences, 2000
Legume Research, 2002
BACKGROUND: Black-foot and Petri diseases are the main fungal diseases associated with young grap... more BACKGROUND: Black-foot and Petri diseases are the main fungal diseases associated with young grapevine decline. Two field experiments were established to evaluate the preventive effect of two potential biocontrol agents (BCAs), i.e. Streptomyces sp. E1 + R4 and Pythium oligandrum Po37, and three BCA-commercial products containing Trichoderma atroviride SC1, Trichoderma koningii TK7 and Pseudomonas fluorescens+Bacillus atrophaeus on fungal infection in grafted plants and plant growth parameters. RESULTS: The effectiveness of some BCA in reducing the incidence and severity of both diseases was dependent on the plant part analyzed and the plant age. No single BCA application was able to control both diseases. Streptomyces sp. E1+R4 were able to reduce significantly the infection of the most prevalent black-foot disease fungi while P. oligandrum Po37 and Trichoderma spp. were able to reduce significantly Phaeomoniella chlamydospora and Phaeoacremonium minimum (Petri disease) infection. BCA treatments had no effect on the shoot weight, and root weight was significantly lower in all BCA treatments with respect to the control.
Stratified random sampling survey conducted for two years during 1996 and 1997 revealed that the ... more Stratified random sampling survey conducted for two years during 1996 and 1997 revealed that the average incidence of foot rot was 48.24 per cent during 1997 as compared to 44.64 per cent during 1996. The disease incidence ranged from 10.5 to 68.5 percent, 19.2 to 69 per cent during 1996 and 1997 respectively. Based on survey over two years, Kalasa, Gaddemane, Sakaleshpur of Chickamagalore district, Karkikoppa of Shimoga, Devarakoppa and Neeranaki of Sirsi were identified as hot spots for foot rot of black pepper in Karnataka.
International Journal of Plant Protection, 2013
Morphological, cultural and physiological characterization of Colletotrichum gloeosporioides (Pen... more Morphological, cultural and physiological characterization of Colletotrichum gloeosporioides (Penz.) Penz. and Sacc., the cause of anthracnose of pomegranate (Punica granatum L.
BIOINFOLET - A Quarterly Journal of Life Sciences, 2013
Freshly grown conidia of Trichoderma harzianum were suspended in oils along with 2% dextrose and ... more Freshly grown conidia of Trichoderma harzianum were suspended in oils along with 2% dextrose and vigorously agitated to find out its inhibition properties on uredospore and conidial germination of rust and late leaf spot. Paraffin oil + neem oil based formulation was most effective in inhibiting rust and late leaf spot causing organisms (87.08% and 91.76%, respectively) followed by neem oil based formulation (81.33 and 84.71% respectively).
Agricultural Reviews, 2003
Traditional method, form the basis of management of plant diseases in low input situations. The a... more Traditional method, form the basis of management of plant diseases in low input situations. The ancient Indian literture documents use of plant products, animals products and wastes for curing the diseases of human beings and plants. The research efforts made on managing panama disease of banana using modified panchavya mixture has shown the promise of the systems. Literature available on the topic is presented in an abridged form.
Twelve local genotypes were screened for charcoal rot resistance in the sick plot duing 1998–99 a... more Twelve local genotypes were screened for charcoal rot resistance in the sick plot duing 1998–99 and 1999–2000. The results of the study indicated that the local genotypes Honnutagi local (17.9%), Kannoli local (20.3%), Muddebihallocal (21.1%) and Barsi Prakash (24.1%) followed by disease incidence were found superior to popularly grown variety M 35-1 (41.2%). The study also revealed that the local genotypes recorded reduced levels of other charcoal not parameters such as per cent lodging due to charcoal rot (% soft stalk), MLS and MNC. The local genotypes also possessed desired breeding traits such as delayed senescence and stay green type could be employed in resistance breeding programme for rabi sorghum.
The Pharma Innovation Journal, 2021
Banana and plantain constitute a major staple food crop for millions of people in developing coun... more Banana and plantain constitute a major staple food crop for millions of people in developing countries. Banana plant is one of the most versatile plant that every part of it is useful to cure different types of disorders rhizome rot disease (tip-over) of Banana caused by Pectobacterium carotovorum subsp. carotovorum is found to be a serious disease and cause considerable yield loss. Common cultivars which occupy major proportion viz., Grand Naine, Rasthali and Nendran are extremely prone to this disease. Conducting survey in major cultivating areas helps to identify the intensity of the disease and in turn helps in carrying out suitable management practices. A roving survey was conducted in the year 2020 to assess the incidence of tip over disease of banana in some major banana growing parts of Karnataka viz., Belagavi, Dharwad, Davangere, Haveri, Shimogga and Uttar Kannada districts, reveals that the incidence of rhizome rot/tip-over disease in surveyed areas ranged 5 to 55%. Among the villages surveyed Gokak village of Belgavi district had shown the highest incidence with 55% whereas, least incidence was observed in Shiralkoppa village of Shimogga district. Among taluks surveyed of Gokak taluk of Belgavi district recorded maximum incidence of 42.34% on other hand least incidence of 10.67% was observed in Sagarataluk of shimogga district. Among the districts Belgavi recorded maximum incidence with 35.22% and least incidence of 9.67% was observed in Shimogga district. Incidence of disease is high in black soils with 55% compared to red soils in which maximum incidence recorded was 33%.
Biochemical and Cellular Archives, 2016
International Journal of Plant Protection, 2010
In this study, different treatments comprising of achook (0.15% Azadirchtin EC), a neem based pro... more In this study, different treatments comprising of achook (0.15% Azadirchtin EC), a neem based product alone and combination with different fungicides were evaluated during Kharif 2008 and 2009 under natural epiphytotic conditions at MARS, UAS, Dharwad. The treatments were applied thrice with first one immediately after appearance of rust symptoms in the field and subsequently at 10 days interval. The study over two years revealed that spraying with achook (0.15% Azadirachtin EC)0.5%-hexaconazole0.1%-achook(0.15%Azadirachtin)0.5% recorded minimum (38.41) Per cent Disease Index (PDI) followed by 42.91 PDI in case of spraying with achook (0.15% Azadirachtin EC) 2%.However,application hexaconazole 0.1% alone recorded minimum incidence of 23.81 PDI. The untreated check recorded maximum PDI (77.45 PDI). Maximum seed yield of 12.30q/ha was recorded in hexaconazole 0.1% followed by 11.21q/ha in achook (0.15%AzadirachtinEC) 0.5%-Hexaconazole0.1%Achook (0.15%Azadirachtin) 0.5%.Minimum seed yield of 6.96q/ha was recorded in untreated check. The present findings will open a new window of opportunity for utilization of achook (0.15% Azadirachtin EC) as one of component in development of spray schedule against Asian soybean rust in India.
Indian phytopathology, Jun 2, 2012
International Journal of Plant and Soil Science, Feb 8, 2018
Annals of Plant Physiology, 2000
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Papers by Dr.Shamarao Jahagirdar