Bio Efficacy of Bio Agents and Botanicals against Alternaria alternata (Fr.) Keissler Causing Leaf Spot of Pomegranate

Kadam, Vasudha A.; Dhutraj, DN; Pawar, D. V.; Patil, Dinanath D

doi:10.20546/ijcmas.2018.711.133

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…The results align with the prior discoveries of the study conducted by [15]. All seven fungal and two bacterial antagonists demonstrated noteworthy inhibition of mycelial growth in A. alternata.…”

Section: As Bio-agentssupporting

confidence: 89%

Fungal Bioagents and Botanicals Efficacy against Alternaria alternata Responsable for Leaf Blight Disease of Stevia rebaudiana

Nayak,

Dhange,

Farooqkhan

et al. 2023

IJPSS

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Stevia rebaudiana, a herbaceous perennial prized for its natural sweetness, has gained global acclaim and found in various parts of India including Karnataka. An exploration into leaf spot disease (caused by Alternaria alternata (FR.) Keissler) in Stevia was conducted under the conditions of southern Karnataka to identify effective management strategies. The symptoms initially manifested as petite circular spots of a light brown colour, subsequently evolving into irregular shapes ranging from dark brown to grey. Some spots maintained their circular form, exhibiting concentric rings or zones. Severely affected leaves exhibited the merging of numerous spots, forming expansive necrotic areas. On older leaves, concentric spots were predominantly found at the tips. The diameter of the leaf spots ranged from 2 to 18 mm. The conidial dimensions varied from 10 to 40 × 6-12 mm, displaying a mid to dark brown or olive-brown color. They were short-beaked, arranged in long chains, and had an oval and bean-shaped structure with 3–5 transverse septa. Considering the adverse effects of chemical fungicides, the exploration for a safer alternative to control the pathogen became a preferable option. This led to experiments involving the use of bioagents for pathogen control. The six known bioagents were evaluated by dual culture, pathogen at periphery and pathogen at the center technique to monitor antagonistic effect. The results revealed that out of all the six bioagents used, two bioagents namely Trichoderma viride (74.77%, 69.04% and 79.45%) and T. harzianum (71.25%, 59.96% and 74.78%) showed maximum growth inhibition in dual culture, pathogen at periphery and pathogen at the center methods, respectively. among the botanicals used neem (36.63%) and ginger (36.42%) found to be effective in inhibiting mycelial growth. Unraveled the strong antagonistic effect to inhibit the mycelia growth of the pathogen significantly.

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Section: As Bio-agentssupporting

confidence: 89%

Fungal Bioagents and Botanicals Efficacy against Alternaria alternata Responsable for Leaf Blight Disease of Stevia rebaudiana

Nayak,

Dhange,

Farooqkhan

et al. 2023

IJPSS

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“…The present result of turmeric rhizome extract 54.92% are in accordance with Kansara and sabalpara (2015) [7] who reported mycelial growth inhibition of Alternaria alternata causing leaf spot disease of niger with turmeric rhizome extract upto 54.37%. Kadam et al (2018) [6] also recorded 60.19% mycelial inhibition of Alternaria alternata isolated from pomegranate with turmeric rhizome.…”

Section: In Vitro Evaluation Of Botanicals Against Alternaria Alternatamentioning

confidence: 90%

In vitro evaluation of fungicides, botanicals and bio-agents against Alternaria alternata causing leaf spot disease of niger

Shingne¹,

Giri²,

Bagade³

2020

Int. J. Chem. Stud.

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Niger [Guizotia abyssinica, family:compositae] is commonly known as ramtil. It is minor oilseed crop. Under favourable condition niger is attacked by various diseases. Out of which, leaf spot caused by Alternaria alternata is one of the predominant disease of niger causes yield loss. The present investigation was carried out to test the efficacy of fungicides, botanicals and bio-agent in vitro against the Alternaria alternata. Among the fungicides tested carboxin + thiram was found most effective arresting 100% mycelial growth inhibition while carbendazim + mancozeb 93.15%, copper oxychloride 92.22%, propineb 90.00% and pyraclostrobin 80.37%. Bioefficacy of botanicals is tested by poisoned food technique and result revealed that maximum mycelial growth inhibition was recorded in turmeric rhizome extract 54.92% followed by neem leaf extract, garlic bulb extract, tulsi leaf extract and eucalyptus leaf extract 35.83%, 26.38%, 18.47% and 14.72% respectively. Among the bio-agents tested by dual culture technique Trichoderma reesei was found superior recorded 75.00% mycelial growth inhibition of Alternaria alternata followed by Pseudomonas fluorescens, bacillus subtilis and Trichoderma asperellum recorded 65.36%, 60.36% and 58.88% respectively.

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Efficacy of Biological and Conventional Fungicide Programs for Foliar Disease Management on Pomegranate (Punica granatum) in Florida

Xavier

Vallad

2020

Plant Health Progress

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Pomegranate (Punica granatum L.) is an emerging alternative perennial crop in the southeastern United States. However, foliar diseases are present across this production area, causing almost 100% premature defoliation. A series of fungicide efficacy trials were conducted to evaluate biological, systemic, and contact fungicides at two locations in Florida, Plant City (cv. Angel Red) and Parrish (cvs. Christina, Azadi, Vikusnyi, Alsirinnar, Sakerdze, and Wonderful), for foliar disease management. Based on AUDPC, the fungicides Captan 80 WDG (captan, 78.2%), Penncozeb 75DF (mancozeb, 75%), Merivon (pyraclostrobin, 21.3% + fluxapyroxad, 21.3%), and Topsin 4.5 FL (thiophanate methyl, 45%) significantly reduced the percentage of foliar disease severity compared with biologicals consisting of Serenade OPTI and Tenet WP (Plant City) and the nontreated control (Plant City and Parrish cv. Wonderful). All treatments applied in a rotational program three times at bloom significantly reduced disease severity compared with the nontreated control in both locations. Rotational programs applied throughout the season also reduced disease severity compared with nontreated controls and repeated applications of neem oil. Foliar disease management is critical for long-term establishment of pomegranate as a viable economic crop in the southeastern United States.

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Bio Efficacy of Bio Agents and Botanicals against Alternaria alternata (Fr.) Keissler Causing Leaf Spot of Pomegranate

Cited by 4 publications

References 7 publications

Fungal Bioagents and Botanicals Efficacy against Alternaria alternata Responsable for Leaf Blight Disease of Stevia rebaudiana

Fungal Bioagents and Botanicals Efficacy against Alternaria alternata Responsable for Leaf Blight Disease of Stevia rebaudiana

In vitro evaluation of fungicides, botanicals and bio-agents against Alternaria alternata causing leaf spot disease of niger

Efficacy of Biological and Conventional Fungicide Programs for Foliar Disease Management on Pomegranate (Punica granatum) in Florida

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