Efficacy of some essential oils on controlling powdery mildew on zinnia (Zinnia elegans L.)

Hegazi, M. A.

doi:10.37855/jah.2010.v12i01.17

Cited by 4 publications

(8 citation statements)

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“…The highest activity of enzymes was linked with decreases of infection with the pathogen of powdery mildew disease. These results are in agreement with the results of [33]. , 25.73 mg and 4.443% µmol min -1 /g fresh tissue, respectively followed by clove oil (10 ml/L), clove oil (5 ml/L), camphor oil (10 ml/L) and camphor oil (5 ml/L) and the same trend cleared with PME and Cx-cellulase enzymes.…”

Section: Data In Table (supporting

confidence: 92%

“…As typical lipophiles, essential oils can travel through the cell wall and cytoplasmic membrane, disrupt the structure of the different layers of polysaccharides, fatty acids and phospholipids, and permeabilize those [32]. Hegazi and El-Kot [33] reported that ginger, cinnamon and clove oils decreased disease incidence and severity of powdery mildew on Zinnia elegans L. Camphor oil was found to be greatly antifungal and most effective against A. niger and A. flavus. The inhibitory effect of the essential oils was proportional to its concentration [34].…”

Section: In Vitro Evaluation Of Treatments On Spore Germinationmentioning

confidence: 99%

“…These results are in agreement with the findings of many researchers who reported that compounds produced by antagonistic microbes have been shown to have potential antifungal activities. Hegazi and El-Kot [33] reported that ginger, cinnamon and clove oils decreased disease incidence and severity of powdery mildew on Zinnia elegans, L. In cucumber, Si reduced the severity of Podosphaera xanthii infections by reducing the number of colonies and their size, the conidia germination and the number of haustoria per colony [17] & [47]. Also [1] showed that filtrates of different microbial isolates except for T. harzianum were more efficient against powdery mildew in squash than the tested fungicide alone at the suggested levels.…”

Section: Efficacy Of Some Alternative Pesticides Against Disease Sevementioning

confidence: 99%

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Alternative Safety Methods for Controlling Powdery Mildew in Squash under Field Conditions

El-Ghanam

Rahhal

Al-Saman

et al. 2018

AJAAR

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Almond (Prunus dulcis), camphor (Cinnamomum camphora) and clove (Syzgium aromaticum) crude oils, silicate, Gram-positive bacterium Streptomyces griseus and a fungus Gliocladium virens culture filtrates in addition to Topas-100 EC (10% penconazole) were used to study of their effects on powdery mildew caused by the fungus Erysiphe cichoracearum. Camphor oil (5 ml/L), clove + camphor + almond (2 and 5 ml/L), G. virens filtrate and Topas-100 (240 ppm) completely inhibited the conidial germination after 24, 48 and 72 h. Topas-100 treatment was the most effective treatment in reducing powdery mildew disease severity of squash with an average of 10.34%, followed by clove oil (5 and 10 ml/L), camphor oil (5 and 10 ml/L) and the mixture of clove +

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Section: Data In Table (supporting

confidence: 92%

Section: In Vitro Evaluation Of Treatments On Spore Germinationmentioning

confidence: 99%

Section: Efficacy Of Some Alternative Pesticides Against Disease Sevementioning

confidence: 99%

See 1 more Smart Citation

Alternative Safety Methods for Controlling Powdery Mildew in Squash under Field Conditions

El-Ghanam

Rahhal

Al-Saman

et al. 2018

AJAAR

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“…For example, Hafez () reported that the protective effect of oils against PMs resulted mainly from the inhibition of conidial germination and suppression of the mycelial growth of the pathogen and there is a slight activation of the host defence mechanisms. On the other hand, Hegazi and El‐Kot () found that spraying zinnia plants with essential oils caused higher activity of peroxidase and polyphenol oxidase enzymes than control. The highest activity of enzymes was correlated with decrease in infection with PM pathogen.…”

Section: Discussionmentioning

confidence: 99%

“…Some essential oils were evaluated for the control of PM ( Erysiphe cichoracearum ) on Zinnia ( Zinnia elegans L.) under field conditions. The highest significant decrease in disease incidence and severity and the best results for most studied growth and flowering parameters and total green colour were recorded with ginger, cinnamon and clove oils, respectively, each at 0.1 ppm (Hegazi and El‐Kot ). Orange oil, grapefruit extract and melaleuca oil gave satisfactory control of PM ( Oidium lycopersici ) of tomato grown under cover (Sobolewski et al.…”

Section: Introductionmentioning

confidence: 99%

Suppression of Powdery Mildew on Flax by Foliar Application of Essential Oils

Aly

Mohamed

Mansour

et al. 2013

Journal of Phytopathology

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Six essential oils were evaluated as to their efficiency in controlling powdery mildew (PM) of flax when they were applied as foliar sprays in an outdoor pot experiment. Onion, flax and fenugreek oils did not affect PM severity ratingsthat is, they were ineffective in controlling the disease. On the other hand, black cumin, jojoba and coriander oil showed variable levels of efficiency in controlling the disease. Black cumin was moderately effective in controlling the disease because it reduced disease severity by 32.87%, while jojoba and coriander oils were highly effective as they reduced disease severity by 66.24 and 68.64%, respectively. Essential oils did not affect seed weight; however, coriander oil was a notable exception as it reduced seed weight by 55%. Straw weight was not affected by any oil. Foliar application of essential oils resulted in significant changes in the levels of protein, phenols, ascorbic acid and malondialdehyde and in activities of peroxidase and polyphenol oxidase. The lack of significant correlation between levels and activities of these biochemical components and PM severity demonstrate that these components are not involved in the suppression of PM by essential oils. Therefore, direct toxicity of essential oils to the causal pathogen Oidium lini is the most likely explanation for the disease suppression.

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The Efficiency of some Essential Oils for Controlling Powdery Mildew on Flax Plants

Mansour

Habeb

Aly

et al. 2022

Journal of Plant Protection and Pathology

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Twenty-two essential oils were tested over three years to examine how effective they were in controlling powdery mildew of flax when they were used as foliar sprays in an outdoor pot experiment. Certain oils exhibited an inconsistency trend across years with some were effective in controlling the disease and others were not. None of the tested oils failed in controlling the disease in all tested years. The cluster analysis grouping of the oils was unrelated to the taxonomic position of their plant sources. Onion, caraway, celery, and black cumin oils were promising for commercialization due to two reasons; firstly, they significantly reduced incidence and severity of disease each year, and secondly, they had no negative effects on seed and straw production.

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Efficacy of some essential oils on controlling powdery mildew on zinnia (Zinnia elegans L.)

Cited by 4 publications

References 0 publications

Alternative Safety Methods for Controlling Powdery Mildew in Squash under Field Conditions

Alternative Safety Methods for Controlling Powdery Mildew in Squash under Field Conditions

Suppression of Powdery Mildew on Flax by Foliar Application of Essential Oils

The Efficiency of some Essential Oils for Controlling Powdery Mildew on Flax Plants

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