Evaluation of biological control agents for managing squash powdery mildew under greenhouse conditions

Elsisi, Ahmed A.

doi:10.1186/s41938-019-0194-9

Cited by 13 publications

(8 citation statements)

References 21 publications

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“…Hafez et al, (2018) found a positive correlation between resistance and oxidative enzymes. Peroxidase also creates hydrogen peroxide that are poisonous to several pathogens, and an increase in its activities, as well as polyphenol oxidase, can prevent disease from spreading via producing phenolic barriers around infection (Elsisi, 2019). Salicylic acid increases the activity of oxidative enzymes (El-Lethy et al, 2011), by oxidizing phenolic compounds to quinines, which are essential in the defense mechanism against pathogens, triggering an increase in antimicrobial activity (El-Khallal, 2007).…”

Section: Discussionmentioning

confidence: 99%

Integration of bioagents with antioxidants to control Powdery Mildew disease in sunflower

Yousef

2021

Egyptian Journal of Agricultural Research

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Powdery mildew disease, caused by Erysiphe cichoracearum, is considered one of the most severe pathogenic threats of sunflower worldwide. This study discusses how to improve the effect of biocontrol agents, as a more economic and ecofriendlier alternative to fungicides, by mixing different bioagents (Trichoderma harzianum and Bacillus subtilis) with different antioxidants (ascorbic acid and salicylic acid), either individually or combined. They were applied to sunflower during two successive seasons to determine their effectiveness in promoting growth and inducing resistance in sunflower against powdery mildew disease under field conditions. Results show that all treatments reduced the severity of powdery mildew disease significantly compared with control. A synergistic effect was noticed when combining T. harzianum and salicylic acid led to a significant decrease in powdery mildew disease severity in sunflower in comparison to control. In general, the results suggested that the integration of antioxidants with bioagents showed a better response to control powdery mildew disease than single treatments. Applied treatments in the field significantly increased all of the studied growth parameters, plant length, fresh and dry weight. All treatments showed a remarkable increase in physiological aspects (enzymes activity and total phenol content).

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Section: Discussionmentioning

confidence: 99%

Integration of bioagents with antioxidants to control Powdery Mildew disease in sunflower

Yousef

2021

Egyptian Journal of Agricultural Research

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“…[17,27], that treatment of cucumber plants with microorganisms, has significantly reduced the severity of powdery and downy mildew diseases, as the organisms activate the production of defense-related enzymes, such as, peroxidase and polyphenol oxidase, as well as, increase the accumulation of phenolic compounds. Reported by [22,18], show that, resistance to powdery mildew is negatively correlated with increased biochemical changes, such as, defense-related enzymes and increased accumulation of phenolic compounds, in probiotic-treated squash plants.…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, a parallel increase in the activities of these enzymes is important for optimal function in plant defense [36]. In addition, peroxidase enzymes (PO), phenylalanine ammonia (PAL), and polyphenol oxidase (PPO), have been reported as inducers of systemic induced resistance (ISR) in plant disease control [45,18,15]. These enzymes act as catalysts of the phenylpropanoid pathway, leading to the biosynthesis of a variety of plant metabolites, such as, phenolic compounds, flavonoids, tannins and lignin [39].…”

Section: Introductionmentioning

confidence: 99%

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Efficiency of Using Some Biological Organisms as Biological Catalysts to Reduce the Incidence of Cantaloupe Downy Mildew Disease Under Greenhouse Conditions

Khalil¹

2022

AJLS

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Infection of cantaloupe plant with Downy mildew caused by the fungus Pseudoperonospora cubensis leads to significant losses in the amount of the crop, in addition to, reducing its marketing value in many countries around the world, therefore, the efficacy of each of the organisms (Trichoderma harzianum, Trichoderma viride, Bacillus subtilis, Bacillus megaterium and Pseudomonas fluorescens), and the fungicide Ridomil gold plus 71.5 WP for the control of cantaloupe downy mildew under laboratory and greenhouse conditions was studied, initially, under laboratory conditions, the results obtained showed that, when using bio filters, in addition to, the recommended concentration of the fungicide to inhibit the germination of P. cubensis sporangia, a significant reduction in the germination rate of the pathogenic fungus sporangia was observed, also, under greenhouse conditions, treatment of cantaloupe with the tested organisms and with the fungicide significantly reduced the severity of downy mildew, compared to the control treatment, where, the best of these treatments in reducing the severity of the disease was the use of the fungicide, while, the organisms were arranged according to their efficiency in reducing the severity of the disease in the following descending order: B. subtilis, Ba. megaterium, P. fluorescens, T. viride and T. harzianum, In addition, cantaloupe plants showed a significant increase in plant growth parameters, for example, (number of leaves, leaf area and total chlorophyll content), also, an increase in yield components, For example, (number of fruits/plant and fruit weight /plant), the above treatments also increased the activity of defense-related enzymes, for example, peroxidase and polyphenol oxidase enzymes, as well as, total phenol content compared to the control treatment.

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“…Meanwhile, a potential approach to disease management due to soil-borne pathogens [17,11,18]. The defense-related enzymes β-1,3 glucanase, peroxidase (PO), phenylalanine and polyphenol oxidase (PPO) were already recognized as induced systemic resistance (ISR) elicitors in plants associated with disease control [19,20,21]. These enzymes contribute to the -85 -phenylpropanoid pathway, causing the synthesis of a variety of plant metabolites, such as phenolic compounds, flavonoids, tannins, and lignin [17,14].…”

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confidence: 99%

Systemic Resistance in Chickpea (Cicer arietinum L.) Elicited by Some Biotic Inducers Against Root Diseases

Mawad

Sarhan

Abo-Ghalia

et al. 2021

Journal of Scientific Research in Science

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The effect of seed treatment of chickpea (Cicer arietinum L.) with biotic inducers such as Trichoderma viride, Trichoderma harzianum, Pseudomonas fluorescens and Bacillus subtilis in contrast to the fungicide Rizolex-T, were evaluated in the greenhouse and under field conditions during the 2017/2018 season to control the plant disease caused by Fusarium oxysporum, Rhizoctonia solani, or Sclerotinia sclerotiorum, at

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Evaluation of biological control agents for managing squash powdery mildew under greenhouse conditions

Cited by 13 publications

References 21 publications

Integration of bioagents with antioxidants to control Powdery Mildew disease in sunflower

Integration of bioagents with antioxidants to control Powdery Mildew disease in sunflower

Efficiency of Using Some Biological Organisms as Biological Catalysts to Reduce the Incidence of Cantaloupe Downy Mildew Disease Under Greenhouse Conditions

Systemic Resistance in Chickpea (Cicer arietinum L.) Elicited by Some Biotic Inducers Against Root Diseases

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