Citokinin-mediated Suppression of Cucumber Powdery Mildew Disease: 6-benzyladenine Suppresses the Growth of Cucumber Powdery Mildew Fungus, Sphaerotheca fuliginea

2006 ◽  
Vol 5 (3) ◽  
pp. 299-306 ◽  
Author(s):  
Shunji Suzuki . ◽  
Shin-ichi Fuji . ◽  
Hiromitsu Furuya . ◽  
Hideki Naito .
Keyword(s):  
Powdery Mildew ◽  
Sphaerotheca Fuliginea ◽  
Powdery Mildew Fungus ◽  
Cucumber Powdery Mildew ◽  
Powdery Mildew Disease

scholarly journals Sensitivity of Cucumber Powdery Mildew Fungus (Sphaerotheca fuliginea) to Several Fungicides

1991 ◽  
Vol 16 (2) ◽  
pp. 271-273
Author(s):  
Norio OHTSUKA ◽  
Kazuhiro SOU ◽  
Tetsuo AMANO ◽  
Yasuhiko NAKAZAWA ◽  
Yoshiaki YAMADA
Keyword(s):  
Powdery Mildew ◽  
Sphaerotheca Fuliginea ◽  
Powdery Mildew Fungus ◽  
Cucumber Powdery Mildew

Incidence of powdery mildew on cucurbit plants in Katsina, Nigeria

2019 ◽  
pp. 05-09
Keyword(s):  
Powdery Mildew ◽  
Low Cost ◽  
Frequency Of Occurrence ◽  
Sphaerotheca Fuliginea ◽  
Causal Organism ◽  
Powdery Mildews ◽  
Powdery Mildew Disease ◽  
Important Disease

The presence study deals with powdery mildews in various cucurbits in Katsina city (Barhim Estate, Kofar Durbi, Kofar Sauri, Kofar Marusa and Low Cost), Nigeria. The finding shows that the areas infested with powdery mildew is one of the important disease of cucurbits. The Sphaerotheca fuliginea was identified to be the causal organism present on all observed cucurbits in the study. Highest frequency of disease was found in Kofar Sauri(79%) fallowed by Kofar Marusa (68%), Kofar Durbi (66%), Barhim Estate (65%) and the lowest frequency of occurrence of disease was found in Low Cost (55%).The intensity of the disease was moderate to severe in general but it was high in many fields, the area-wise variation was also noticed. On vegetables, the highest frequency of occurrence of powdery mildew disease was observed on L. cylindrica (76.4%) followed by C. moschata (60%), C. sativus (59.3%), C. vulgaris (53.9%) and lowest was found on C. melo (44.4%). The highest intensity of disease was found on C. moschata, followed by L. cylindrica, C. sativus, C. vulgaris and C. melo.

scholarly journals Effective Management of Cucumber Powdery Mildew with Essential Oils

Agriculture ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1177
Author(s):  
Yasser S. Mostafa ◽  
Mohamed Hashem ◽  
Ali M. Alshehri ◽  
Saad Alamri ◽  
Ebrahem M. Eid ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Essential Oils ◽  
Disease Incidence ◽  
Its Region ◽  
Dry Weight ◽  
Positive Control ◽  
Powdery Mildew Fungus ◽  
Membrane Injury ◽  
Cucumber Powdery Mildew

This research evaluated the efficacy of essential oils in the management of cucumber powdery mildew. Essential oils of lemongrass, lemon, thyme, peppermint, abundance blend, purification blend, and thieves blend were tested in vitro and under greenhouse conditions in two separate experiments. The effects of essential oils were tested against powdery mildew disease at concentrations of 1.0–2.5 mL/L, and the consequent impact of the oils on plant growth was evaluated. Powdery mildew fungus, Podosphaera xanthii, was identified using sequencing of the ITS region. The essential oils significantly reduced disease incidence up to 77.3% compared with the positive control (p < 0.5). Moreover, the essential oils increased the plant length (up to 187 cm), leaf area (up to 27.5 cm2), fresh weight (up to 123 g), dry weight (up to 22.5 g), number of flowers (16.3), and metabolite content compared with the positive control (p < 0.5). Cell membrane injury decreased significantly in the oil-treated pants (p < 0.5), indicating the protective effect of essential oils. This study recommends the application of essential oils in an appropriate dose (2.5 mL/L) to protect cucumber plants against powdery mildew. Overdose of the oils (more than 2.5 mL/L) should be avoided due to adverse effects.

A Powdery Mildew Fungus Levels the Playing Field for Garlic Mustard (Alliaria petiolata) and a North American Native Plant

2009 ◽  
Vol 2 (3) ◽  
pp. 253-259 ◽  
Author(s):  
Don Cipollini ◽  
Stephanie Enright
Keyword(s):  
Powdery Mildew ◽  
Plant Communities ◽  
North American ◽  
Alliaria Petiolata ◽  
Garlic Mustard ◽  
Native Plant ◽  
Powdery Mildew Fungus ◽  
Powdery Mildew Disease ◽  
Seed Output ◽  
Aboveground Growth

AbstractWhen exposed to native or introduced herbivores and pathogens, invasive plants may become weaker competitors with more benign impacts on individual plants and plant communities. In a greenhouse pot study, we tested whether the presence of powdery mildew disease caused by Erysiphe cruciferarum could alter the competitive impact of garlic mustard on Impatiens pallida, a North American native understory plant. Target I. pallida plants were grown alone or with one, two, or three garlic mustard neighbors. Half of the pots exposed to garlic mustard were inoculated with conidia of E. cruciferarum. Competition with garlic mustard moderately affected aboveground growth of I. pallida, particularly at high garlic mustard density, but it strongly reduced seed output across all densities. In contrast, inoculation of garlic mustard plants with E. cruciferarum completely abolished their competitive impact on seed output of I. pallida across all densities, independent of effects on aboveground growth of target plants. This effect was likely due to alteration in the ability of garlic mustard to compete for belowground resources. Even without killing garlic mustard, these results indicate that the presence of powdery mildew disease in the field will likely dampen the competitive impact of garlic mustard on individual plants and plant communities. Escape from such attackers has likely contributed to the invasiveness and impacts of garlic mustard in North America.

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