Results 31 to 40 of about 261 (152)

Factors Influencing the Occurrence of Onion Downy Mildew (Peronospora destructor) Epidemics: Trends from 31 Years of Observational Data

Agronomy, 2020
Onion downy mildew (ODM) caused by Peronospora destructor has been increasing annually in south-western Québec since the early 2000s, reaching 33% of affected onion fields in 2014. Using observational data collected over a period of 31 consecutive years,
Hervé Van der Heyden, Pierre Dutilleul, Jean-Benoît Charron, Guillaume J. Bilodeau, Odile Carisse   +4 more
doaj   +1 more source

Altas diluições dinamizadas de nitrato de cálcio e sulfato de potássio no manejo de tripes, míldio e rendimento de cebola em sistema orgânico de produção

Revista Thema, 2017
Estudos com substâncias ultradiluídas também têm sido realizados como estratégia de manejo fitossanitário para sistemas orgânicos de produção. O objetivo deste trabalho foi avaliar o efeito de altas diluições dinamizadas de nitrato de cálcio e sulfato ...
Paulo Antonio de Souza Gonçalves, Pedro Boff, Edivânio Rodrigues de Araújo   +2 more
doaj   +1 more source

Doses of ash from carbonized rice husk on the incidence and damage of thrips, downy mildew severity and yield of onion under organic system

Vértices, 2017
The objective of this study was to evaluate the effect of ash from carbonized rice husk on the incidence and damage of thrips, downy mildew severity, yield, onion postharvest performance and chemical characteristics of the soil in organic system.
Paulo Antonio de Souza Gonçalves, Edivânio Rodrigues de Araújo, João Vieira Neto, Fábio Satoshi Higashikawa, Cristiano Mora   +4 more
doaj   +1 more source

Monitoring of Peronospora destructor Primary and Secondary Inoculum by Real-Time qPCR

Plant Disease, 2020
Onion downy mildew (ODM), caused by Peronospora destructor, is a serious threat for onion growers worldwide. In southwestern Québec, Canada, a steady increase in occurrence of ODM has been observed since the mid-2000s. On onion, P. destructor can develop local and systemic infections producing numerous sporangia which act as initial inoculum locally ...
Hervé Van der Heyden, Guillaume J. Bilodeau, Odile Carisse, Jean-Benoit Charron   +3 more
openaire   +2 more sources

Field performance and screening for resistance to Peronospora destructor of 46 onion cultivars in Brazil [PDF]

Australasian Plant Disease Notes, 2018
This work evaluated the field performance and resistance to Peronospora destructor of 46 onion cultivars in two different experiments. Two open-pollinated experimental cultivars: “Bola Precoce-Agroecologica, and “Superprecoce-Agroecologica” were more productive and resistant.
Daniel Pedrosa Alves, Edivânio Rodrigues de Araújo, Gerson Henrique Wamser, Paulo Antônio de Souza Gonçalves, Caillet D. Marinho, Rafael Simões Tomaz   +5 more
openaire   +2 more sources

Review of the existing maximum residue levels for benalaxyl‐M according to Article 12 of Regulation (EC) No 396/2005

EFSA Journal, Volume 17, Issue 9, September 2019., 2019
Abstract According to Article 12 of Regulation (EC) No 396/2005, EFSA has reviewed the maximum residue levels (MRLs) currently established at European level for the pesticide active substance benalaxyl‐M. To assess the occurrence of benalaxyl‐M residues in plants, processed commodities, rotational crops and livestock, EFSA considered the conclusions ...
European Food Safety Authority (EFSA), Maria Anastassiadou, Alba Brancato, Luis Carrasco Cabrera, Lucien Ferreira, Luna Greco, Samira Jarrah, Aija Kazocina, Renata Leuschner, Jose Oriol Magrans, Ileana Miron, Stefanie Nave, Ragnor Pedersen, Hermine Reich, Alejandro Rojas, Angela Sacchi, Miguel Santos, Alois Stanek, Anne Theobald, Benedicte Vagenende, Alessia Verani   +20 more
wiley   +1 more source

Entomopatógenos e óleo de nim associados a silício no manejo de tripes, míldio e rendimento de cebola

Agropecuária Catarinense, 2019
O objetivo desse estudo foi avaliar entomopatógenos e óleo de nim associados a silício no manejo de tripes, míldio e variáveis de rendimento em cebola.
Paulo Antonio de Souza Gonçalves, Edivânio Rodrigues de Araújo   +1 more
doaj   +1 more source

Review of the existing maximum residue levels for fluopicolide according to Article 12 of Regulation (EC) No 396/2005

EFSA Journal, Volume 17, Issue 7, July 2019., 2019
Abstract According to Article 12 of Regulation (EC) No 396/2005, EFSA has reviewed the maximum residue levels (MRLs) currently established at European level for the pesticide active substance fluopicolide. To assess the occurrence of fluopicolide residues in plants, processed commodities, rotational crops and livestock, EFSA considered the conclusions ...
European Food Safety Authority (EFSA), Maria Anastassiadou, Alba Brancato, Luis Carrasco Cabrera, Lucien Ferreira, Luna Greco, Samira Jarrah, Aija Kazocina, Renata Leuschner, Jose Oriol Magrans, Ileana Miron, Stefanie Nave, Ragnor Pedersen, Marianna Raczyk, Hermine Reich, Silvia Ruocco, Angela Sacchi, Miguel Santos, Alois Stanek, Anne Theobald, Benedicte Vagenende, Alessia Verani   +21 more
wiley   +1 more source

Modification of the existing maximum residue levels and setting of import tolerances for oxathiapiprolin in various commodities

EFSA Journal, Volume 17, Issue 7, July 2019., 2019
Abstract In accordance with Article 6 of Regulation (EC) No 396/2005, the applicant Du Pont de Nemours GmbH submitted two requests to the competent national authority in Ireland to modify the existing EU maximum residue levels (MRLs) and to set import tolerances for oxathiapiprolin in various plant commodities in order to accommodate the intended EU ...
European Food Safety Authority (EFSA), Maria Anastassiadou, Alba Brancato, Luis Carrasco Cabrera, Luna Greco, Samira Jarrah, Aija Kazocina, Renata Leuschner, Jose Oriol Magrans, Ileana Miron, Stefanie Nave, Ragnor Pedersen, Marianna Raczyk, Hermine Reich, Silvia Ruocco, Angela Sacchi, Miguel Santos, Alois Stanek, Anne Theobald, Benedicte Vagenende, Alessia Verani   +20 more
wiley   +1 more source

Modeling the Dynamics of Fungal Diseases in Onion Cultivation With Optimal Control Strategies

Engineering Reports, Volume 7, Issue 7, July 2025.
The HPLIRF model reveals fungal disease dynamics in onion crops, identifying spore deposition and infection rates as key drivers. Optimal control combining fungicide and plant removal minimizes disease spread cost‐effectively, enhancing crop resilience.
Dejen Ketema Mamo, Mathew Ngugi Kinyanjui, Yohannes Fissha Abebaw, Gizachew Kefelew Hailu, Shewafera Wondimagegnhu Teklu   +4 more
wiley   +1 more source