scholarly journals Comparison of root and foliar applications of potassium silicate in potentiating post-infection defences of melon against powdery mildew

2015 ◽  
Vol 64 (5) ◽  
pp. 1085-1093 ◽  
Author(s):  
L. J. Dallagnol ◽  
F. A. Rodrigues ◽  
S. F. Pascholati ◽  
A. A. Fortunato ◽  
L. E. A. Camargo
Keyword(s):  
Powdery Mildew ◽  
Post Infection ◽  
Potassium Silicate

scholarly journals Occurrence period, severity and management of powdery mildew and rust in Jatropha curcas

2018 ◽  
Vol 44 (3) ◽  
pp. 274-277
Author(s):  
Alexandre Dinnys Roese ◽  
Walmes Marques Zeviani ◽  
Harley Nonato de Oliveira ◽  
Cesar José da Silva
Keyword(s):  
Powdery Mildew ◽  
Azadirachta Indica ◽  
Jatropha Curcas ◽  
Metarhizium Anisopliae ◽  
Potassium Silicate ◽  
Evaluation Period ◽  
Jatropha Curcas L ◽  
Commercial Crop

ABSTRACT Jatropha curcas L. has been studied with the aim of attending the bioenergy demand in Brazil. In this study, the time of occurrence, the severity, and the control of powdery mildew and rust in a commercial crop were investigated. During the evaluation period, powdery mildew was first observed soon after the onset of the raining period in October. Rust was first observed in April. Metarhizium anisopliae. Azadirachta indica oil, J. curcas oil, and the fungicide triadimenol were efficient in controlling powdery mildew. None of these products nor potassium silicate did control rust.

Evaluation of biocontrol agents and potassium silicate for the management of powdery mildew of zucchini

2014 ◽  
Vol 73 ◽  
pp. 8-15 ◽  
Author(s):  
Habtom B. Tesfagiorgis ◽  
Mark D. Laing ◽  
Harold J. Annegarn
Keyword(s):  
Powdery Mildew ◽  
Potassium Silicate ◽  
Biocontrol Agents

MANAGEMENT OF POWDERY MILDEW IN SOILLESS TOMATOES BY USING POTASSIUM SILICATE

2011 ◽  
pp. 353-356
Author(s):  
G. Gilardi ◽  
A. Garibaldi ◽  
M.L. Gullino
Keyword(s):  
Powdery Mildew ◽  
Potassium Silicate

scholarly journals Control of powdery mildew (Leveillula taurica) on tomato by foliar sprays of liquid potassium silicate (K2SiO3)

2011 ◽  
Vol 10 (16) ◽  
pp. 3121-3123 ◽  
Author(s):  
Yanar Yusuf ◽  
Yanar Durdane ◽  
Gebologlu Naıf
Keyword(s):  
Powdery Mildew ◽  
Potassium Silicate ◽  
Foliar Sprays ◽  
Leveillula Taurica

scholarly journals Effectiveness of Peroxy Acetic Aacid (PAA), Perbicarbonate (PB) and Potassium Silicate (PS) on Okra Growth, Yield and Resistance to Powdery Mildew

2020 ◽  
Vol 11 (12) ◽  
pp. 1417-1425
Author(s):  
I. Tantawy ◽  
Reham Abdalla ◽  
Ranya EL-Ashmony ◽  
A. Galal
Keyword(s):  
Powdery Mildew ◽  
Growth Yield ◽  
Potassium Silicate

scholarly journals Effect of potassium silicate on epidemic components of powdery mildew on melon

2011 ◽  
Vol 61 (2) ◽  
pp. 323-330 ◽  
Author(s):  
L. J. Dallagnol ◽  
F. A. Rodrigues ◽  
F. A. O. Tanaka ◽  
L. Amorim ◽  
L. E. A. Camargo
Keyword(s):  
Powdery Mildew ◽  
Potassium Silicate

scholarly journals Suppression of Powdery Mildew on Greenhouse-Grown Cucumber by Addition of Silicon to Hydroponic Nutrient Solution Is Inhibited at High Temperature

Plant Disease ◽  
2003 ◽  
Vol 87 (2) ◽  
pp. 177-185 ◽  
Author(s):  
Andrew C. Schuerger ◽  
William Hammer
Keyword(s):  
Powdery Mildew ◽  
Light Intensity ◽  
Nutrient Solution ◽  
Potassium Silicate ◽  
Disease Suppression ◽  
Effect Of Temperature ◽  
Rooting Medium ◽  
Canadian Studies ◽  
The Difference ◽  
Nutrient Solutions

Silicon amendments to hydroponic nutrient solutions have been used successfully in Canada to suppress powdery mildew (PM) caused by Sphaerotheca fuliginea on cucumber (Cucumis sativus). In contrast, preliminary trials in Florida greenhouses failed to achieve the level of disease suppression reported in the literature for Canadian studies. A series of greenhouse experiments were conducted in Florida to determine the factors involved in reducing the effectiveness of silicon amendments for PM suppression on cucumber. Three horticultural practices (cultivar, nutrient solution formula, and rooting medium) and two environmental factors (light intensity and temperature) were tested in combination with silicon amendments for their effects on the suppression of PM on cucumber. When plants were irrigated with a standard nutrient solution amended with potassium silicate at 0 mg/liter, the cucumber cv. Vetomil was found to be resistant and cvs. Corona, Cilla, Farbio, and Toska were found to be susceptible to PM. Susceptible cultivars irrigated with potassium silicate at 100, 150, or 200 mg/liter exhibited a slight but statistically significant reduction in PM over the course of a 49-day trial. Although PM in the cultivar trial was slightly lower in treatments with added silicon, disease suppression with silicon was not commercially useful because it failed to increase fruit yields. Nutrient solution formula, rooting medium, and light intensity had no effects on the levels of PM suppression, regardless of whether plants were irrigated with potassium silicate at 0 or 100 mg/liter. Temperature was found to act in a synergistic manner with silicon. The greatest effect of temperature on PM suppression was observed at 20°C in which cucumber plants, irrigated with silicon at 100 mg/liter, exhibited significant reductions in the numbers of PM colonies per leaf. Disease suppression by silicon was observed at 25 and 30°C, but the magnitude of the disease suppression was significantly lower than when plants were maintained at 20°C. The effect of temperature on PM suppression by silicon may explain the difference in results between previous experiments in Canada, where greenhouse temperatures averaged 20 to 25°C, and the current study in Florida, where greenhouse temperatures averaged 24 to 32°C.

scholarly journals Management of Apple Scab and Powdery Mildew Using Bicarbonate Salts and Other Alternative Organic Products with Fungicide Effect in Apple Cultivars

2018 ◽  
Vol 46 (1) ◽  
pp. 115-121 ◽  
Author(s):  
Viorel MITRE ◽  
Erzsébet BUTA ◽  
Lehel LUKÁCS ◽  
Ioana MITRE ◽  
Răzvan TEODORESCU ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Apple Scab ◽  
Ammonium Phosphate ◽  
Potassium Silicate ◽  
Potassium Bicarbonate ◽  
Resistant Cultivars ◽  
Lime Sulphur ◽  
Fruit Growing ◽  
Apple Cultivars ◽  
Organic Fruit

The control of apple scab and powdery mildew is a challenge for organic fruit growing. Bicarbonate salts are already consecrate in reducing the attack of scab and powdery mildew in organic apple culture. In the current study the influence of some products accepted in organic apple production to control scab and powdery mildew (potasium bicarbonate, lime sulphur, wettable sulphur, potassium silicate, cooper ammonium-phosphate, potassium bicarbonate + potassium silicate, potassium bicarbonate + wettable sulphur) in comparison with untreated control, were used.  The biological material was represented by three scab resistant cultivars (‘Luna’, ‘Topaz’ and ‘Sirius’) and three scab susceptible cultivars (‘Elstar’, ‘Pinova’ and ‘Golden Delicious’). The experiments were carried out during 2014-2016 at Steluța LTD, Cluj-Napoca, N.W. Romania, as a bifactorial experiment arranged in randomized blocks. The trees were planted in 2011 at a density of 3,175 trees/ha. Depending of the year, a number of 18-22 treatments were made annually after each rain. It can be concluded that the combination of potassium bicarbonate + wettable sulphur significantly reduced the attack degree of scab and powdery mildew on leaves and fruits and increased the yield of the scab-susceptible and scab resistant cultivars. Good results were obtained in the case of treatment with potassium bicarbonate with potassium silicate, potassium bicarbonate and cooper ammonium phosphate. The treatments with the products used in the experiments did not register symptoms of phytotoxicity on leaves or fruits, except lime sulphur and wettable sulphur and cooper ammonium phosphates.

scholarly journals Suppressive effect of potassium silicate against strawberry powdery mildew

2001 ◽  
Vol 43 (0) ◽  
pp. 27-28
Author(s):  
Takeshi Kanto ◽  
Yutaka Iwamoto ◽  
Yasuyuki Osada
Keyword(s):  
Powdery Mildew ◽  
Suppressive Effect ◽  
Potassium Silicate

scholarly journals Foliar Applications of Potassium Silicate Reduce Severity of Powdery Mildew on Cucumber, Muskmelon, and Zucchini Squash

1992 ◽  
Vol 117 (6) ◽  
pp. 902-905 ◽  
Author(s):  
Jim Menzies ◽  
Pat Bowen ◽  
David Ehret ◽  
Anthony D.M. Glass
Keyword(s):  
Powdery Mildew ◽  
Active Ingredient ◽  
Potassium Silicate ◽  
Separate Experiment ◽  
Distilled Water ◽  
Sphaerotheca Fuliginea ◽  
Erysiphe Cichoracearum ◽  
Foliar Sprays ◽  
Application Methods ◽  
Nutrient Solutions

The effect of soluble potassium silicate applied to cucumber (Cucumis sativus L.), muskmelon (C. melo L.), and zucchini squash (Cucurbita pepo L.) on the severity of powdery mildew was examined. Application methods included amending nutrient solutions to a concentration of 1.7 mm Si and foliar sprays containing 1.7, 8.5, 17, and 34 mm Si. Untreated plants and plants sprayed with distilled water were used as controls. The leaves of all plants were inoculated with known concentrations of conidia of Sphaerotheca fuliginea (Schlecht.:Fr.) Poll. (cucumber and mu&melon) or Erysiphe cichoracearum DC.: Merat (zucchini squash) 1 day after the sprays were applied. Inoculated leaves on plants receiving the Si-amended nutrient solution or foliar sprays of ≥ 17.0 mm Si developed fewer powdery mildew colonies than those on control plants. Results of a separate experiment that included a potassium spray, indicated that the active ingredient of the potassium silicate sprays appears to be Si. Experiments to test the persistence of Si foliar sprays on cucumber demonstrated that a 17 mm Si spray applied 7 days before inoculation with S. fuliginea reduced mildew colony formation.

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