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Evaluation of Fungicides against Downy Mildew (Peronospora destructor Berk) of Onion (Allium cepa) in Bale Zone, South Eastern Ethiopia

Mohammedamin Abdurezake, Getachew Asefa

Asian Journal of Agricultural and Horticultural Research · pp. 161–168 · Published 20 Oct 2022

10.9734/ajahr/2022/v9i4204

Abstract

Aims: To evaluate the efficacy of tested fungicides against downy mildew of onion and determine the appropriate interval of fungicides application. Study Design: The experiment was laid out down in randomized complete block design with three replications for each treatments. Place and Duration of Study:  The experiment was carried out in farmers field of Aloshe village; Goba district of Bale zone in 2018/2019 during “Bona Season”. Methodology: Locally available onion variety and two tested fungicides (Mancozeb (Mancozeb 80 Wp) and Ridomil (Ridomil Gold MZ 68WG) were used. Locally available variety of onion was planted in a plot size of 3m x 2.4m with three replications. Each two fungicides were applied at interval of seven day, fourteen and twenty one day interval including unapplied fungicide plot as control. Results: The result indicated that, both fungicides (Mancozeb and Ridomil) were effectively reduces the severity level of the disease. The higher plant height(42.5cm), bulb weigh (289g), total weight of the bulbs (114Qt/ha) and lower severity (8.35%) were recorded from weekly application of Ridomil, fourteen day application of Ridomil and weekly application interval of Mancozeb. The higher marginal rate of return of 2833.45% and 1999.07% were recorded from weekly and fourteen applications of Mancozeb and Ridomil respectively. Conclusion: The minimum application frequency of three times of Ridomil in fourteen days and weekly interval application of Mancozeb were effective against downy mildew and profitable.

Downy mildew Peronospora destructor onion fungicide severity

References (11)

  1. 1 The Effect of Nitrogen Fertilization on the Expression of Slow-Mildewing Resistance in Knox Wheat [DOI]
  2. 2 From agronomic data to farmer recommendations : an economics training manual
  3. 3 From agronomic data to farmer recommendations : an economics training manual
  4. 4 Management of major diseases and insect pests of onion and garlic: A comprehensive review [DOI]
  5. 5 Management of downy mildew (Peronospora destructor) of onion (Allium cepa) [DOI]
  6. 6 Effects of Garlic Rust (Puccinia allii) on Yield and Yield Components of Garlic in Bale Highlands, South Eastern Ethiopia [DOI]
  7. 7 Incidence of onion downy mildew and its impact on yield
  8. 8 Control Efficacy of Several Fungicides against Downy Mildew of Onion at Nursery Seedling Stage [DOI]
  9. 9 Journal of Plant Breeding and Crop Science [DOI]
  10. 10 Compendium of onion and garlic diseases and pests [DOI]
  11. 11 RNA sequence analysis data of Peronospora destructor maintained on onions [DOI]

Cited by 2

Fungicide Preharvest Application Strategies and Their Effects on Crop Yield, Quality, and Sprouting of Dried Onion Bulbs

Ana Avilés-Quezada, Martín Fuentes-López, A. Guirao · Agronomy · 2025

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