Refine your search
Co-Authors
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Hegde, Yashoda R.
- Evaluation of Fungicides Against Botryodiplodia Theobromae Causing Collar Rot in jatropha Curcas
Abstract Views :187 |
PDF Views:0
Authors
Affiliations
1 Department of Plant Pathology, University of Agricultural Sciences, Dharwad karnataka, IN
1 Department of Plant Pathology, University of Agricultural Sciences, Dharwad karnataka, IN
Source
International Journal of Plant Protection, Vol 6, No 1 (2013), Pagination: 45- 47Abstract
Jatropha curcas is gaining importance as a biodiesel crop. Among the different diseases affecting jatropha, collar rot caused by Botryodiplodia theobromae is an important one. Very little information is available on the management aspects of this disease. Therefore, different contact, systemic and combi product fungicides were evaluated against Botryodiplodia theobromae. Among the different fungicides tested, mancozeb and propineb (contact), propiconazole and carbendazim (systemic) and Quintal and Saaf (combi product) were found to effective to manage the pathogen under in vitro conditions.Keywords
Jatropha Curcas, Collar Rot, Fungicides, Management- Cultural, Morphological and Pathogenic Variability in fusarium Oxysporum f. Sp. lycopercici Isolates from Major Tomato Growing Areas of Karnataka
Abstract Views :234 |
PDF Views:0
Authors
Affiliations
1 Department of Horticultural Plant Pathology, K.R.C.College of Horticulture, Arabhavi Karnataka, IN
2 Department of Plant Pathology, College of Agriculture, University of Agricultural Sciences, Dharwad Karnataka, IN
3 Department of Plant Pathology, College of Agriculture, University of Agricultural Sciences, Dharwad Karnataka
1 Department of Horticultural Plant Pathology, K.R.C.College of Horticulture, Arabhavi Karnataka, IN
2 Department of Plant Pathology, College of Agriculture, University of Agricultural Sciences, Dharwad Karnataka, IN
3 Department of Plant Pathology, College of Agriculture, University of Agricultural Sciences, Dharwad Karnataka
Source
International Journal of Plant Protection, Vol 6, No 1 (2013), Pagination: 103-107Abstract
Twenty three isolates of Fusarium oxysporum f. sp. lycopercici were collected from major tomato growing areas of Karnataka. They produced three kinds of spores, viz., microconidia, macroconidia and chlamydospors. Mycelia of the pathogen were white cottony to pink often with purple tinge or reddish colouration of the medium. Total isolates were assigned into three groups, on the basis of colony diameter, colony characters, sporulation and degree of pathogenicity. Isolates Fol-1, Fol-4, Fol-6 Fol-9, Fol-11, F ol-13, Fol-15 and Fol-21 showed abundant aerial mycelium and sporulation with maximum colony diameter (75 to 90.0 mm). They showed strong virulence with 75 per cent severity and wilting symptoms were noticed 14 days after inoculation.Keywords
Tomato, Fusarium Oxysporum F. Sp. Lycopercici, Cultural, Pathogenic Variability- Exploration of Plant Extracts and Fungal Antagonists against sclerotium rolfsii Causing Sclerotium Wilt of Stevia
Abstract Views :271 |
PDF Views:0
Authors
Affiliations
1 Department of Plant Pathology, University of Agricultural Sciences, Raichur Karnataka, IN
2 Department of Plant Pathology, University, of Agricultural Sciences, Dharwad Karnataka, IN
1 Department of Plant Pathology, University of Agricultural Sciences, Raichur Karnataka, IN
2 Department of Plant Pathology, University, of Agricultural Sciences, Dharwad Karnataka, IN
Source
International Journal of Plant Protection, Vol 6, No 2 (2013), Pagination: 309-311Abstract
Stevia is an important medicinal plant used as a low calorie sweetener. Sclerotium wilt caused by Sclerotium rolfsii is an important disease and is a major constraint in stevia cultivation. Evaluation of the biocontrol agents indicated that maximum inhibition of mycelial growth of S. rolfsii (78.51%) was noticed in Trichoderma harzianum (Dharwad isolate). Among botanicals tested, Durantha was highly effective at 10 per cent (75.14) followed by Glyrecidia (72.14%).Keywords
Stevia, Sclerotium Rolfsii, Duranta Repens, Trichoderma Harzianum- Cultural Characterstics of Cercospora Beticola Sacc. Causing Leaf Spot of Palak
Abstract Views :304 |
PDF Views:0
Authors
Poornima
1,
Yashoda R. Hegde
1
Affiliations
1 Department of Plant Pathology, College of Agricultural Sciences, University of Agricultural Sciences, Dharwad (karnataka), IN
1 Department of Plant Pathology, College of Agricultural Sciences, University of Agricultural Sciences, Dharwad (karnataka), IN
Source
International Journal of Plant Protection, Vol 7, No 2 (2014), Pagination: 441-443Abstract
Palak (Beta vulagaris var. bengalensis Hort.) is one of the most popular leafy vegetables widely grown in India. This crop is severely affected by leaf spot disease caused by Cercospora beticola leading to brown coloured spots on the leaves which hinders the market quality of the leaves. All media are not equally good for all fungi, nor there is a universal substrate or artificial medium, upon which all fungi can grow. So, different media including both synthetic and non-synthetic were tried for C. beticola in the present experiment. Cultural studies of C. beticola grown on different solid media showed that Potato dextrose agar and Oat meal agar were good for growth. Among the nine liquid media evaluated, maximum dry mycelial weight of the fungus was obtained in Soypeptone broth which was significantly superior to all other media. Temperature requirement of the fungus was found 25°C where good growth was observed.Keywords
Cercospora Beticola, Cultural Characters, Palak- Study on Host Range and Susceptible Stage of the Leaf Spot of Palak Caused by Cercospora Beticola Sacc.
Abstract Views :410 |
PDF Views:0
Authors
Poornima
1,
Yashoda R. Hegde
1
Affiliations
1 Department of Plant Pathology, University of Agricultural Sciences, Dharwad (karnataka), IN
1 Department of Plant Pathology, University of Agricultural Sciences, Dharwad (karnataka), IN
Source
International Journal of Plant Protection, Vol 7, No 2 (2014), Pagination: 489-491Abstract
Leaf spot disease is one of the major diseases of palak caused by Cercospora beticola. Symptoms of the leaf spot disease of palak were noticed on both leaf and petiole. On leaf brown coloured spots with circular or irregular margin or straw coloured centre with brown margin were observed. On petiole, brown coloured lesions were noticed. To know the alternate hosts of C. beticola, five different leafy vegetables viz., Amaranthus spp. Beta vulgaris, Coriandrum sativum, Trigonella foetum graceam, Lactuca sativa were tested. Among these Amaranthus and Beta vulgaris showed the positive reaction to C.beticola and to know the susceptibility stage of the palak to C.beticola different ages of the plants like 7, 14, 21, 28, 35, 42, 49, 56, 63 days old plants were tested among these 28 days old plants showed the highest disease severity.Keywords
Palak, Host range, Susceptible stage, Cercospora beticola- Traditional Landraces of Rice for Blast (Magnaporthe oryzae) Resistance and Analysis of Biochemical Components Involved in Disease Reaction
Abstract Views :330 |
PDF Views:0
Authors
Affiliations
1 Department of Plant Pathology, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Biotechnology, University of Agricultural Sciences, Dharwad (Karnataka), IN
1 Department of Plant Pathology, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Biotechnology, University of Agricultural Sciences, Dharwad (Karnataka), IN
Source
Asian Journal of Bio Science, Vol 9, No 2 (2014), Pagination: 261-266Abstract
Rice blast disease is the major biotic threat to rice production and the pathogen Magnoporthe oryzae is highly genetically diverse. Rice germplasm are the important reservoirs of valuable traits possessing specialty uses and tolerance to various biotic and abiotic stresses. The present study was aimed to evaluate the collected landraces of rice against blast and to understand the biochemical changes in landraces in response to blast infection. Field evaluation of 186 rice landraces collected from Karnataka state, along with improved lines resulted in identification of land races with consistent resistance to blast. The key biochemical factors involved in disease reaction, Phenol, orthodihydroxy phenol, protein and enzyme PAL at different crop growth stages was studied. Total phenol, OD phenol and PAL accumulation and increase were rapid and more in resistant landraces as well as in improved lines due to blast infection. Landrace Beesginsali, Siddasala and Casebatta showed highly resistant reaction with disease grade either 1 or 0 and lesion type A or B. Enhancement of defense responsive biochemical components was quick and more in these landraces. These resistant landraces may serve as source of novel allele/genes to blast for future study.Keywords
Rice, Landraces, Blast, Resistance, Biochemical FactorsReferences
- Arnow, L.E. (1937). Colorimetric determination of the components of 2, 4-dihydroxy phenylalanine-tyrosine mixture. J. Biol. Chem., 118: 531-537.
- Bonman, J.M., Dedios, T.I.V. and Khin, M.M. (1986). Physiologic specialization of Pyricularia oryzae in the Phillippines. Plant Dis., 70: 767–769.
- Bray, H.G. and Thrope,W.Y. (1954). Analysis of phenolic compounds of interest In: metabolism. In: Moth Biochem: Annual (Ed.) Glick, D. Intersarnae Publishing Inc., New York, 1 : 27-52.
- Byre, Gowda (1997). Genetics of blast resistance and biochemical compounds associated with disease resistance in finger millet (Eleusine coracana G.) M.Sc. (Ag.) Thesis, Univeristy Agriculture Science, Dharwad, KARNATAKA (INDIA).
- Correa-Victoria, F. and Zeigler, R. (1993). Pathogenic variability in Pyricularia grisea at a rice blast hot spot breeding site in eastern Colombia. Plant Disease, 77 : 1035.
- IRRI (2002). Standard evaluation system for rice. In Los Banos, Manila, Philippines, International Rice Research Institute,
- Lee, E.J. and Cho, S.Y. (1990). Variation in races of rice blast disease and varietial resistance in Korea. In: Papers presented at the focus on Irrigated Rice, Seoul, Korea, pp. 27-31.
- Lowry, O.H., Rosebrough, Fan, A.L. and Randall, R.J. (1951). Protein measurement with folin phenol reagent. J. Biological Chem., 193 : 265-275.
- Prashanthi, S.K., Kulkarni, Srikant, Meena, B.S., Yashoda, R.H. and Hanamaratti, N.G. (2010). Molecular variability of rice blast pathogen, Pyricularia grisea and resistant gene deployment in Karnataka. In: Gangawane L.V and Khilare V.C (eds), Molecular Biology of Plant Pathogens, Daya publishing House, Delhi. pp. 191-202.
- Ralph, L. and Nicholson (1992). Phenolic compounds and their role in disease resistance. Ann. Rev. Phytopath, 30 : 369-389.
- Ramkumar, G., Biswal, A., Mohan, K.M., Sakthivel, K., Sivaranjani, A., Neeraja, C., Ram, T., Balachandran, S., Sundaram, R. and Prasad, M. (2010). Identifying novel alleles of rice blast resistance genes Pikh and Pita through allele mining. Int. Rice Res. Notes, 117 : 4185.
- Sadasivam, S. and Manickam, A. (1996). Biochemical Methods. II Ed., New Age International (P) Ltd., New Delhi, pp. 256.
- Srinivasachary, Shailaja, Hittalmani, S.S., Vaishali, M.G., Shashidhar, H.E. and Kumar, Girish K. (2002). Genetic analysis of rice blast fungus of southern Karnataka using DNA markers and reaction of popular rice genotypes. Curr. Sci., 42 : 25-28.
- Widawsky, D.A. and O’Toole, J.C. (1990). Prioritizing the rice biotechnology research agenda for Eastern India. In: New York, The Rockefeller Foundation.
- Zhang, J.T., Duan, G.M. and Yu, Z.Y. (1987). Relationship between Phenylalanine ammonia lyase (PAL) activity and resistance to rice blast. Plant physiol. comm., 6 : 34-37.