Work

Resistant cultivar associated with a disease alert system: a viable way to reduce the number of sprays in controlling downy mildew of onion

Year: 2024

Type: article

Abstract: Downy mildew is a production limiting factor for Brazil's main onion producing region. In the present study we adopted two management strategies (resistant cultivar and disease alert system) with the aim of reducing the number of systemic fungicide sprays, maintaining satisfactory yield levels. By carrying out fungicide sprays only when the alert system indicated a severe risk and using the cultivar “SCS379 Robusta”, it was possible to reduce the number of sprays from 11 (calendar) to 5 (alert system), maintaining statistically similar yields (32.58 ton./ha – calendar; and 30.76 ton/ha – alert system). Furthermore, considering only the value of the fungicide, the production cost was BRL 0.069/Kg – calendar, and BRL 0.033/Kg – alert system. Integrated management, using different control strategies, appears to be a viable alternative to mitigate the damage caused by onion downy mildew.

Source: Australasian Plant Disease Notes

DOI: 10.1007/s13314-024-00543-4

Authors: Edivânio Rodrigues de Araújo, Renata Sousa Resende

Institution: Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina

Language: English

Topic: Fungal Plant Pathogen Control

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: bronze

Funder: Fundação de Amparo à Pesquisa e Inovação do Estado de Santa Catarina