Effect of Bioagents, Resistance Inducers and Cow Milk on Controlling Cucumber Powdery Mildew
El-Dakar, H., Mahmoud, N. (2014). Effect of Bioagents, Resistance Inducers and Cow Milk on Controlling Cucumber Powdery Mildew. EKB Journal Management System, 42(2), 159-169. doi: 10.21608/ejp.2014.95591
Hala El-Dakar; Noher Mahmoud. "Effect of Bioagents, Resistance Inducers and Cow Milk on Controlling Cucumber Powdery Mildew". EKB Journal Management System, 42, 2, 2014, 159-169. doi: 10.21608/ejp.2014.95591
El-Dakar, H., Mahmoud, N. (2014). 'Effect of Bioagents, Resistance Inducers and Cow Milk on Controlling Cucumber Powdery Mildew', EKB Journal Management System, 42(2), pp. 159-169. doi: 10.21608/ejp.2014.95591
El-Dakar, H., Mahmoud, N. Effect of Bioagents, Resistance Inducers and Cow Milk on Controlling Cucumber Powdery Mildew. EKB Journal Management System, 2014; 42(2): 159-169. doi: 10.21608/ejp.2014.95591

Effect of Bioagents, Resistance Inducers and Cow Milk on Controlling Cucumber Powdery Mildew

Egyptian Journal of Phytopathology
Article 10, Volume 42, Issue 2, December 2014, Page 159-169  XML PDF (131.38 K)
Document Type: Original Article
DOI: 10.21608/ejp.2014.95591
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Authors
Hala El-Dakar* 1; Noher Mahmoud2
1Integ. Cont. Res. Dept., Plant Pathol. Res. Inst., A.R.C., Giza
2Identificat. Microorg., Biol. Control of Pl. Dis. & Evaluation of Biofungicides Unit., Plant Pathol. Inst., A.R.C., Giza
Abstract
Four bioagents, i.e. Bacillus megaterium, B. pumilus, B. subtilis and B. thuringiensis, and four resistance inducers (RI), i.e. chitosan, humic acid, potassium monophosphate and salicylic acid as well as cow full cream, skim and milk whey caused significant reduction in the germinated conidia of Golovinomyces cichoracearum var. cichoracearum (D.C.) Heluta (syn. Erysiphe cichoracearum D.C.), the causal of cucumber powdery mildew compared to the check treatment. This reduction was increased with increasing the tested concentration. In greenhouse experiment, spraying the tested bioagents and RI as well as cow full cream, skim and whey milk resulted in different decrements in the disease severity and increments in plant length as well as foliage fresh and dry weight. Field experiments during 2013 and 2014 growing seasons revealed that spraying of B. subtilis, potassium monophosphate and cow whey milk, individually or in combinations, caused significant reduction in the disease severity with significant increase in the fruit yield. Spraying these compounds individually was less efficient in this regard compared with spraying them in combinations. Combination of B. subtilis + potassium monophosphate + cow whey milk recorded more disease reduction and yield increase. Therefore, the reference fungicide was mostly efficient as the combined treatment.
Keywords
Bacillus spp; bioagents; cow milk; cucumber; inducer resistance and powdery mildew
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