Management of Rust (Puccinia allii R.) through Host Resistance and Alternate Application of Fungicides on Garlic (Allium sativum L.) in North Wollo, Ethiopia

  • Zemenu Endalew Dryland Agricultural Research Center
  • Habtamu Terefe School of Plant Sciences
  • Mashilla Dejene School of Plant Sciences
Keywords: AUDP; Bulb yield; DPR; Fungicides, Nativo; Severity, Tilt

Abstract

Rust (Puccinia allii R.) is the major problem constraining garlic production in most
areas of northern Ethiopia. Thus, this study was conducted during 2018 with the objectives
to (1) evaluate the effects of integrated disease management through host resistance and
alternate fungicide applications on rust epidemic and bulb yield; and (2) determine the
economics of fungicide application in the management of garlic rust. Field experiments were
conducted in Gidan and Lalibella districts of North Wollo, Ethiopia, using three garlic
varieties, namely Chelenko-1, Tseday, and a local cultivar. Nativo and Tilt fungicides were
sprayed with alternate and alone applications during the 2018 cropping season. Treatments
were arranged factorially in a randomized complete block design with three replications.
Analyses of variance revealed that interaction effects of Nativo, Tilt, and their alternate
applications with Chelenko-1 and Tseday varieties showed the lowest disease severity, area
under the disease progress curve, and disease progress rate as compared to the unsprayed
plots of all varieties. In Lalibella, the variety Chelenko-1 showed significantly higher (9 t ha-1)
yield and, exhibited 28 and 21% yield advantages over Tseday variety and the local cultivar,
respectively. However, there was no significant difference among the fungicides tested on
bulb yield in both districts, but lower relative yield losses were recorded in response to
application of Nativo and Tilt alone. The economic analysis also confirmed that sole
application of Nativo on Local and Tilt on both Tseday and Chelenko-1 showed higher net
profit and marginal rates of return than other treatment combinations. Thus, the fungicides
Tilt and Nativo alone were relatively effective against garlic rust and economically profitable
in Lalibela and related agro-ecologies for the variety Chelenko-1. However, there was no
significant variation in garlic bulb yield of all varieties in Gidan, and the same fungicides with
local garlic variety can be used for rust management and sustainable garlic production.

Author Biographies

Zemenu Endalew, Dryland Agricultural Research Center

Sekota Dryland Agricultural Research Center, ARARI, P.O.Box 62, Sekota, Ethiopia

Habtamu Terefe, School of Plant Sciences

School of Plant Sciences, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia

Mashilla Dejene, School of Plant Sciences

School of Plant Sciences, Haramaya University, P.O. Box 138, Dire Dawa, Ethiopia

Published
2020-01-01

Most read articles by the same author(s)

Obs.: This plugin requires at least one statistics/report plugin to be enabled. If your statistics plugins provide more than one metric then please also select a main metric on the admin's site settings page and/or on the journal manager's settings pages.