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Acharya Narendra Deva University of Agriculture & Technology, Ayodhya

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Subject: Plant Pathology × Author: Kumar, Deepak × Start date: 2017 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Studies of the Variabilities in Alternaria Alternata causing leaf spot of Ber(Ziziphus mauritiana Lamk.)
    (ANDUAT, Kumarganj, Ayodhya, 2021-08-04) Kumar, Deepak; Singh, Dr. H.K.
    The Indian jujube (Zizyphus mauritiana Lamk.) is one of the most important fruit trees, widely planted in tropics, subtropics regions and Mediterranean regions. India is considered the origin of ber. The fruit is Rhamnaceae, which is generally considered the fruit of the poor. Ber is a good source of carbohydrates, essential minerals, ascorbic acid, iron, calcium, and phosphorus etc. Ber are attacked by many pests and pathogens. Many fungal diseases are also present such as powdery mildew (Oidium erysiphoides f.sp. zizyphi), rust (Phakospora zizyphus vulgaris), leaf spot (Alternaria alternata, Cercospora zizyphi, Cladosporium zizyphi, Phoma macrostoma, Isariopsis indica var. Zizyphi), etc. Due to the Alternaria Alternata fungus, it causes maximum damage to plants. As a result of this disease large parts of the blade are burnt and in such cases the leaflets often wilt and drop and cause severe yield loss. This study was conducted in the ber growing area of Uttar Pradesh, Ayodhya. The experiment carried out at ANDUAT, Kumarganj Main Experiment Station of Horticulture (MES)and plant pathology laboratory in 2019-2021. This fungus was isolated from infected leaves of ber plants and isolation, purification and identification of pathogen was performed. Morphological and cultural study was performed by Poison food technique to find that the fungus was Alternaria alternata with branching mycelium. And septate with light brown to blackish conidiophore in the acropetal sequence. And spores are olive colured, green to dark brown with transverse and longitudinal septa.