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- Organic Amendment, Biocontrol Agents and Soil Solarization Practice in Management of Fusarium Wilt of Carnation Caused by Fusarium oxysporum Schledit. F.sp. Dianthi (Prill. and Del.) Snyd. and Hans
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1 Department of Plant Pathology, Dr. Y.S.P University of Horticulture and Forestry, Nauni, SOLAN (H.P.), IN
1 Department of Plant Pathology, Dr. Y.S.P University of Horticulture and Forestry, Nauni, SOLAN (H.P.), IN
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International Journal of Plant Protection, Vol 8, No 1 (2015), Pagination: 130-133Abstract
Carnation is severely affected by Fusarium oxysporum f.sp. dianthi which considerably affect the yield and quality of the flowers. Use of organic amendments, biological control agents and soil solarization alone and in combination with antagonists was tried in the present investigation. The results revealed that neem cake and pine needles out of nine organic amendments gave 77.49 and 72.49 per cent disease control with minimum disease incidence. Combined application of two antagonists Trichoderma viride and T. harzianum after 60 days of soil solarization practices registered minimum incidence (16.25%) of the disease followed by T. viride and T. harzianum. The growth characteristics stem length, number of flowers and flower size per plant also increased significantly in these treatments.Keywords
Carnation, Wilt, Organic Amendment, Soli Solarization.
- Biological Control of Rose Powdery Mildew (Podosphaera pannosa (Wallr.: Fr.) De Bary
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Affiliations
1 Department of Plant Pathology, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), IN
1 Department of Plant Pathology, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), IN
Source
International Journal of Plant Protection, Vol 9, No 2 (2016), Pagination: 639-643Abstract
Powdery mildew, caused by Podosphaera pannosa (Wallr.: Fr.) de Bary (Syn. Sphaerotheca pannosa var rosae (Wallr.: Ex Fr.) Lev.), is one of the most important fungal diseases in roses. These are obligate parasites and considered as one of the most distributed and destructive groups of plant pathogens. The symptoms appear on leaves, shoots, buds, thorns, peduncles and flowers as powdery, whitish growth (mycelium, conidiophores and spores) of the mildew fungus. Plants can be severely stunted if they are heavily infected early in the growing season. The disease has been managed mainly by chemical fungicides but increasing public concern over the use of fungicides has made the development of biological control for powdery mildew highly desirable. Recent reports have highlighted the potential of biological control as an alternative strategy for disease management. Several biological control methods such as use of microbial antagonists (fungi, bacterial, yeast and yeast like organisms), botanicals and bioproducts have been found effective against rose powdery mildew fungi. The main objective of this review paper is to summarize the data on the microbial antagonists, bioproducts (anhydrous milk products, oils and compost extracts) and botanicals which have been reported effective for the better management of this plant pathogen.Keywords
Antagonists, Biological Control, Bioproducts, Botanicals, Podosphaera pannosa, Rose.References
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- Waghmare, M.B., Waghmare, R.M. and Kamble, S.S. (2011).Bioefficacy of plant extracts on growth of Botrytis Cinerea causing leaf blight of rose. Bioscan, 6 (4) : 643-645.
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- Role of Modelling in Plant Disease Management
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1 Department of Plant Pathology, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), IN
1 Department of Plant Pathology, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), IN
Source
International Journal of Plant Protection, Vol 11, No 1 (2018), Pagination: 124-134Abstract
Indian’s economy is agricultural based. Agriculture provides maximum employment in the country. Unfortunately, crop production is heavily affected by the pests and diseases. In addition to refinement in the existing management practices, there is a need for simulation models to assess the potential of emerging pathogens for a given crop production system and also shift in pathogen populations/fitness that may demand modifications in current production systems. Forecasting models which allows investigating multiple scenarios and interactions simultaneously has become most important for disease prediction, impact assessment and application of disease management measures. Many weather driven epidemiological models have been developed and used to predict plant disease epidemics under variable climate. Most forecasting models are meant for tactical and strategic decisions. Similarly, the Mill’s Table also had been modified for Apple scab epidemic under H.P conditions. Moreover, remote sensing and image analysis have been used in plant diseases epidemiology to forecast the plant diseases. These epidemiological tools have been designed to help the farmers in enhancing the efficiency and adequacy of disease management. A complete knowledge of these epidemiological tools provide quick, fast and accurate prediction of disease and helps in timely disease control.Keywords
Epidemic, Forecasting, Modelling, Simulation.References
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- First Report of Microstroma juglandis Causing Downy Leaf Spot or White Mould on Celtis australis from Himachal Pradesh, India
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1 Department of Plant Pathology, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), IN
1 Department of Plant Pathology, Dr. Y. S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), IN
Source
International Journal of Plant Protection, Vol 11, No 2 (2018), Pagination: 161-163Abstract
Microstroma sp. collected on living leaves of Celtis australis L. (Cannabaceae ) from Himachal Pradesh, India is a new host record. Symptoms of the disease on leaves appeared in the form of small, circular to irregular, white coloured spots or mouldy growth surrounded by a yellow zone. The fungus isolated was identified as Microstroma juglandis on the basis of cultural appearance and morphological characters. The pathogen was able to induce the characteristic symptoms of downy leaf spot or white mould within 14-16 days after inoculation.Keywords
Celtis Australis, Downy Leaf Spot, Microstroma Sp.References
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- Status of Arbuscular Mycorrhiza (AM) in Nurseries of Willow, Poplar and Pine Seedlings in Himachal Pradesh
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1 Department of Plant Pathology, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), IN
1 Department of Plant Pathology, Dr. Y.S. Parmar University of Horticulture and Forestry, Nauni, Solan (H.P.), IN
Source
International Journal of Plant Protection, Vol 13, No 1 (2020), Pagination: 87-92Abstract
Poplar and willow are economically-important, fast-growing tree species with the ability to colonize nutrient-poor environments. Willow (Salix sp.) offers a great potential as a source of renewable energy and for bioremediation and polluted environments. To initiate a study on the possible contribution of arbuscular mycorrhiza to this ability, we isolated mycorrhial fungi from in and around the rhizosphere of native poplar (Populus sp.), willow (Salix sp.) and pine (Pinus sp.) seedlings grown in research nurseries at Dr. Y.S. Parmar University of Horticulture and Forestry, Solan (H.P.). Several species of mycorrhizal fungi grew well in the rhizosphere of these trees, were characterized based on morphological studies. The number of spores per 50 g of rhizosphere soil from pinus, willow and poplar were found to be 1380, 1290, 1300 and 540, 490, 530 spores at 106 µ and 250 µ mesh sieves, respectively. The presence of these AM fungi may help explain the ability of these pioneering tree species to grow under nitrogen limitation. Their presence will be helpful in mitigating the losses due to soil borne diseases as well as enhancing the plant vigor.Keywords
VAM (Vesicular Arbuscular Mycorrhiza), Poplar, Willow, Pine, Salix, Rhizosphere.References
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