Organic fertilization and alternative products in the control of powdery mildew
Open Access
- 1 March 2020
- journal article
- research article
- Published by FapUNIFESP (SciELO) in Ornamental Horticulture
- Vol. 26 (1), 57-68
- https://doi.org/10.1590/2447-536x.v26i1.2109
Abstract
Rose is a plant of high nutritional requirement, susceptible to powdery mildew disease caused by fungus Oidium leucoconium, which causes leaf fall and losses in flower production. The objective of this study was to evaluate powdery mildew severity in rose cultivar 'Grand Gala' in response to organic fertilization and the application of alternative products to disease control. The first experiment was set in a factorial arrangement, with 5 alternative products: spraying with water as a control (PA), lime sulfur (CS), neem oil (ON), mixture of sodium bicarbonate and canola oil (BC) and coffee pyroligneous acid (APC) and 2 organic fertilizers: chicken manure (EA) and biofertilizer based on banana stalk (B). Disease severity was assessed at 0, 15, 30 and 45 days after the treatments. In the second experiment, asymptomatic leaves or with different powdery mildew severity levels were sprayed only once with the same alternative products mentioned above. Severity was assessed at 0, 7 and 14 days. The organic fertilizations did not influence the reduction in powdery mildew severity in rose. At 45 days, APC yielded a greater reduction in disease severity (81.6%), followed by treatments based on BC, ON and CS. Greater reduction in disease severity in experiment 2 occurred in the treatments of BC and CS, followed by APC. Therefore, it is possible to conclude that APC and the BC have the potential to control rose powdery mildew in an organic cultivation system.Keywords
This publication has 28 references indexed in Scilit:
- Inhibitory effect of exogenous sodium bicarbonate on development and pathogenicity of postharvest disease Penicillium expansumScientia Horticulturae, 2015
- Biocontrol of gray mold in grapes with the yeast Hanseniaspora uvarum alone and in combination with salicylic acid or sodium bicarbonatePostharvest Biology and Technology, 2014
- Insecticidal and anti-microbial activity of bio-oil derived from fast pyrolysis of lignin, cellulose, and hemicelluloseJournal of Pest Science, 2014
- Produção e qualidade de morangueiro sob diferentes concentrações de calda bordalesa, sulfocálcica e biofertilizante supermagroSemina: Ciências Agrárias, 2013
- Controle de mancha-angular utilizando-se caldas fertiprotetoras em cultivo orgânico de feijoeiro irrigadoPesquisa Agropecuária Tropical, 2010
- Combining biological control with physical and chemical treatments to control fruit decay after harvestStewart Postharvest Review, 2010
- Efeito de produtos alternativos para o controle do bolor verde (Penicillium digitatum) em pós-colheita de citrosRevista Brasileira de Fruticultura, 2002
- Controle químico do oídio do mamoeiroFitopatologia Brasileira, 2002
- Novel disease control compounds: the potential to ‘immunize’ plants against infectionPlant Pathology, 1995
- Effect of Sodium Bicarbonate and Oils on the Control of Powdery Mildew and Black Spot of RosesPlant Disease, 1992