Evaluation of Silicon for Managing Powdery Mildew on Gerbera Daisy

Moyer, Catalina; Peres, Natália A.; Datnoff, Lawrence E.; Simonne, Eric H.; Deng, Zhanao

doi:10.1080/01904160802459641

Cited by 32 publications

(20 citation statements)

References 26 publications

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“…However, Si amendment does not always result in reduced disease severity. Moyer et al. (2008) found that potassium and calcium silicate application to the growth medium of gerbera daisy was not able to reduce severity of powdery mildew caused by Erysiphe cichoracearum / Podosphaera fusca .…”

Section: Discussionmentioning

confidence: 96%

“…Bars represent standard errors and within each genotype, three asterisks on a column denotes a significant difference at P < 0AE001. Moyer et al (2008) found that potassium and calcium silicate application to the growth medium of gerbera daisy was not able to reduce severity of powdery mildew caused by Erysiphe cichoracearum ⁄ Podosphaera fusca. It was suggested that the reason for this lack of effect could be that the disease pressure was very high and that infection took place before Si had a time to exert sufficient protection.…”

Section: Discussionmentioning

confidence: 97%

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Silicon induced resistance against powdery mildew of roses caused by Podosphaera pannosa

et al. 2011

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Powdery mildew, caused by Podosphaera pannosa, is a very common disease in greenhouse potted roses, resulting in poor marketing value and hence economic losses. Alternatives to chemical control are necessary, and therefore the ability of silicon (Si) applied to roots to control the disease was investigated, as well as the mechanisms behind the observed disease reductions. Four genotypes of miniature potted roses representing different genetic backgrounds and susceptibility to disease were studied. Plants were watered with a nutrient solution containing either 3AE6 mM Si (100 ppm) supplied as K 2 SiO 3 (Si+) or no Si (Si)) before inoculation with P. pannosa. Si application increased leaf Si content two-to four-fold compared to control plants. Confocal microscopy showed that Si deposition was larger in Si+ than in Si) plants and that deposition mainly occurred in the apoplast, particularly in epidermal cell walls. Si application delayed the onset of disease symptoms by 1-2 days and disease severity was reduced by up to 48AE9%. The largest reduction was found in the two most resistant genotypes, which also had the highest increase in Si uptake. The Si-induced disease protection was accompanied by increased formation of papillae and fluorescent epidermal cells (FEC) as well as deposition of callose and H 2 O 2 , especially at the sites of penetration and in FEC, which are believed to represent the hypersensitive response. Si treatment reduced powdery mildew development by inducing host defence responses and can therefore be used as an effective eco-friendly disease control measure.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 97%

Silicon induced resistance against powdery mildew of roses caused by Podosphaera pannosa

et al. 2011

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“…Also, Sonavane et al (2011) found that Aspergillus spp., infection resulted in the lowest seed germination and seedling vigor index followed by F. oxysporum, F. moniliforme thin M. phaseolina and treatments with fungicidal (thiram+carbendazim) were significantly compared to the biological control agents (Trichoderma viride). Biological control of plant diseases can occur through different mechanisms, which are generally classified as: antibiosis, competition, suppression, direct parasitism, induced resistance, hypo virulence and predation (Moyer and Peres, 2008).…”

Section: Discussionmentioning

confidence: 99%

Effect of some Treatments on Seed Health and Viability of Soybean

Ibrahim¹

2015

Plant Pathology J.

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A B S T R A C TThis study was carried out in order to evaluate effect of treating soybean seed (Glycin max L.) as seed coating with fungicidal (Vetavax-thiram 200), seed dressing with biotic (Bio-arec, Bio-zeid) and seed soaking with abiotic (Salicylic acid) in controlling fungal diseases and improving seed and seedlings vigor of cultivars (Giza 21, G.35, G.111, G.22, G.82, Klark, Crawford) . The obtained results showed that, Alternaria spp., Aspergillus spp., Cercospora kikuchii, Diaporthe sojae, Fusarium moniliforme, F. semitectum, F. solani, F. oxysporum, Macrophomina phaseolina, Rhizoctonia solani and Penicillium spp., were associated with soybean seed with different percentage. All treatments gave high significant p#0.05 protection against seed-borne fungi in seed and seedling health evaluation test when applied seed treatments compared with control. Vitavax-200 was the most effective where lead to eliminated the mentioned fungi completely and improve of seed and seedling vigor characters. Giza 21 cv. recorded the less value borne of total fungi as compared of cultivars. Biotic reduced numbers of fungi and gave protection against pathogenic fungi and increased values seed and seedling vigor of soybean cultivars. Giza 82 cv. showing better seed and seedling vigor and less seed infection by pathogenic fungi in seedling health evaluation test. Fusarium moniliforme has been widely and most frequently with seed rot followed by F. semitectum. Fusarium solani was responsible for greater proportion of abnormal seedlings followed by F. oxysporum. Abiotic salicylic acid played important role in enhancing seed vigor, increased seedling length, dry weight of seedlings, reduced number of total fungi on seed and diseases incidence in seedlings (abnormal seedlings, seed rot).

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“…Fungal biocontrol agents, including the extensively studied Trichoderma spp., have been reported to reduce infection or reproduction of many pathogens. Successful biological control of powdery mildew in cucumber and other vegetable crops has been achieved by a number of researchers under greenhouses and field trials using fungal and bacterial antagonists (Kiss et al 2004;Hegazi and El-Kot 2008;Moyer and Peres 2008).…”

Section: Introductionmentioning

confidence: 99%

Management of cucumber powdery mildew by certain biological control agents (BCAs) and resistance inducing chemicals (RICs)

Awad

Abo-Elyousr

Abdel-Monaim

2012

Archives Of Phytopathology And Plant Protection

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The efficiency of some commercial biological control agents (BCAs), Bio Zaid and Bio Arc, and resistance inducers chemicals (RICs) (salicylic acid and Bion) on management of cucumber powdery mildew, caused by Sphaerotheca fuliginea, was evaluated in vitro and in vivo. In vitro experiments revealed that application of the tested BCAs and RICs significantly reduced the disease severity, number of conidia per leaf area unit (cm) and reduced germination of conidiospores of the causal pathogen. Under field conditions, application of BCAs and RICs caused significant decrement in the disease severity with significant increment in the fruit yield compared with check treatments. On the average, application of Bion recorded the highest values, either in reducing the disease severity or in raising the average fruit yield followed by Bio Arc. On the other hand, applying salicylic acid (SA) recorded, on the average, the lowest efficiency in reducing disease severity and low values of fruit yield in both growing seasons.

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Evaluation of Silicon for Managing Powdery Mildew on Gerbera Daisy

Cited by 32 publications

References 26 publications

Silicon induced resistance against powdery mildew of roses caused by Podosphaera pannosa

Silicon induced resistance against powdery mildew of roses caused by Podosphaera pannosa

Effect of some Treatments on Seed Health and Viability of Soybean

Management of cucumber powdery mildew by certain biological control agents (BCAs) and resistance inducing chemicals (RICs)

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