scholarly journals Control of powdery mildew (Podosphaera leucotricha) on apple seedlings using anhydrous milk fat and soybean oil emulsions

2011 ◽  
Vol 64 ◽  
pp. 201-208 ◽  
Author(s):  
K.V. Wurms ◽  
A. Ah Chee

Powdery mildew (PM) is one of the most serious global diseases of apples roses cucurbits grapes and cereals The potential of anhydrous milk fat (AMF) and soybean oil (SBO) formulations to control apple PM (caused by Podosphaera leucotricha) on the apple cultivar Royal Gala was investigated Potted seedlings in a glasshouse were left unsprayed or subjected to weekly sprays of AMF SBO fungicide (sulphur as Kumulus DF) or water During 67 weeks of treatment the AMF and SBO formulations significantly reduced PM to

2011 ◽  
Vol 64 ◽  
pp. 195-200 ◽  
Author(s):  
A. Ah Chee ◽  
K.V. Wurms ◽  
M. George

Powdery mildew (PM) is a serious fungal disease of a wide range of horticultural crops and can adversely affect crop yield and quality Anhydrous milk fat (AMF) and soybean oil (SBO) emulsions were evaluated for control of PM (Sphaerotheca pannosa var rosae) on potted rose plants (Rosa L sp Splendid Surprise and Sahara) maintained in a controlled environment Foliage was sprayed weekly with AMF (07 w/v) SBO (2 w/v) fungicide (Supershield 1 v/v) water or left unsprayed PM infection increased to 100 leaf area in water and unsprayed control plants over 6 weeks The fungicide reduced infection to a severity rating of 5 (>40 leaf area infection) The AMF and SBO treatments gave significantly better disease control (P


2015 ◽  
Vol 68 ◽  
pp. 380-388 ◽  
Author(s):  
K.V. Wurms ◽  
J.D. Hofland-Zijlstra

Powdery mildew (PM) is a very serious disease affecting glasshousegrown roses and tomatoes in the Netherlands Control is limited because of resistance to existing fungicides Anhydrous milk fat (AMF) and soybean oil (SBO) emulsions were evaluated for control of PM in roses and tomatoes Both AMF (14 g/litre) and SBO (14 g/litre) provided powdery mildew control on rose leaves and blooms that was significantly better (P


Author(s):  
I. J. Holb

Apple powdery mildew (Podoshphaera leucorticha) occurs wherever apples are grown. One of the most important fungal disease of apple which causing severe econimic loss on susceptible apple cultivars. This review focuses on the control of apple powdery mildew. The first part of the study provides details of novel aspects of non-chemical control approaches, including agronomic measures, mechanical and biological control options as well as essential features of apple cultivar resistance. After this, developments in chemical control options are described sperately for integrated and organic apple orchards.


2018 ◽  
Vol 71 ◽  
pp. 272-284 ◽  
Author(s):  
Kirstin Wurms ◽  
Annette Ah Chee

Powdery mildew is a major cause of damage to squash plants. Anhydrous milk fat (AMF) or soybean oil (SBO) may be effective at treating this disease but these active ingredients must be mixed with an emulsifier to enable even distribution and suspension of fat globules, and an antioxidant to prevent rancidity. The overall formulation may affect disease control efficacy, leaf health and product stability. The effect of different emulsifiers and antioxidants on emulsion stability, odour and shelf-life of AMF and SBO bio-fungicides was tested in laboratory assays, and on powdery mildew disease control efficacy and leaf health on glasshouse-grown squash plants. Both AMF and SBO formulations including a polyglycerol ester emulsifier (Grindsted® PGE 20 Veg) resulted in the best emulsion stability, disease control and leaf health. None of the antioxidants tested significantly affected on disease control efficacy in AMF formulations, but SBO formulations containing vitamin E as the antioxidant provided the best disease control efficacy and emulsion stability.


2020 ◽  
Vol 132 ◽  
pp. 109038
Author(s):  
Maria Isabel Landim Neves ◽  
Mayara de Souza Queirós ◽  
Rodolfo Lázaro Soares Viriato ◽  
Ana Paula Badan Ribeiro ◽  
Mirna Lúcia Gigante

LWT ◽  
2021 ◽  
pp. 112276
Author(s):  
Maria Isabel Landim Neves ◽  
Mayara de Souza Queirós ◽  
Rodolfo Lázaro Soares Viriato ◽  
Ana Paula Badan Ribeiro ◽  
Mirna Lúcia Gigante

Author(s):  
David Adam Strickland ◽  
Kathie Hodge ◽  
Kerik Cox

Within is a comprehensive review of current apple powdery mildew literature, with the taxonomy, morphology, and life cycle of the causal phytopathogen Podosphaera leucotricha described. A discussion of economic impact, environmental aspects contributing to apple powdery mildew epidemiology, options for cultural, chemical, and biopesticide disease control, and fungicide resistance in P. leucotricha is also detailed. The present status of breeding for host resistance and apple cultivar susceptibility are discussed. Finally, emerging research into the biology and management of apple powdery mildew are discussed along with how they may aid future research endeavors.


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