Effect of Bicarbonates on the control of powdery mildew (Oidium sp.) in Cucumber (Cucumis sativus L.)
DOI:
https://doi.org/10.29312/remexca.v5i6.884Keywords:
Cucurbitaceous, efficacy, antifungal properties, diseaseAbstract
To determine the efficacy of potassium bicarbonate (BP) and sodium bicarbonate (BS) in the control of powdery mildew (Oidium sp.) in cucumber plants, an investigation was conducted under greenhouse conditions cultivating plants of cv ‘Poinsett 76’ in pots with a capacity of 4.5 kg of chromic vertisol soil. Every third day was fertilized with a composed solution of 101 g KNO3, 200 g of CaNO3, 136 g KH2PO and 246 g MgSO4, diluted in 100 liters of water. Treatmentswere2,4and6gL-1ofBPwaterand2and4g L-1 BS, same as with manual spray applied onto foliage to drip point. At 31, 33 and 35 days after the first application (ddpa) the number of leaves, number of diseased leaves, incidence and severity of powdery mildew on leaves of the main stem was evaluated. The number of leaves was not affected by potassium or sodium bicarbonate; the highest decrease of diseased leaves (94.6, 93.3 and 92.4%) was obtained with 4 g L-1 of BP, at the respective 31, 33 and 35 ddpa. The maximum decrease (48.4 percentage points) of mildew incidence was observed in plants of 4 g L-1 BP (p≤ 0.05); with the same dose, the severity of powdery mildew decreased to 84.3 and 60.5 percentage points in leaves three and four, respectively; while in leaf five the disease was zero.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
The authors who publish in Revista Mexicana de Ciencias Agrícolas accept the following conditions:
In accordance with copyright laws, Revista Mexicana de Ciencias Agrícolas recognizes and respects the authors’ moral right and ownership of property rights which will be transferred to the journal for dissemination in open access. Invariably, all the authors have to sign a letter of transfer of property rights and of originality of the article to Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP) [National Institute of Forestry, Agricultural and Livestock Research]. The author(s) must pay a fee for the reception of articles before proceeding to editorial review.
All the texts published by Revista Mexicana de Ciencias Agrícolas —with no exception— are distributed under a Creative Commons License Attribution-NonCommercial 4.0 International (CC BY-NC 4.0), which allows third parties to use the publication as long as the work’s authorship and its first publication in this journal are mentioned.
The author(s) can enter into independent and additional contractual agreements for the nonexclusive distribution of the version of the article published in Revista Mexicana de Ciencias Agrícolas (for example include it into an institutional repository or publish it in a book) as long as it is clearly and explicitly indicated that the work was published for the first time in Revista Mexicana de Ciencias Agrícolas.
For all the above, the authors shall send the Letter-transfer of Property Rights for the first publication duly filled in and signed by the author(s). This form must be sent as a PDF file to: revista_atm@yahoo.com.mx; cienciasagricola@inifap.gob.mx; remexca2017@gmail.
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 International license.
