Abstract
Rust is a major disease of garlic in Ethiopia. A field experiment was conducted at Kabe and Segno Kebeles of Woreilu District in 2019 to determine the appropriate rate and spraying frequency of propiconazole fungicide and select cost-effective management options of garlic rust. A randomized complete block design with three replications was used. The combination of five rates and three spraying frequencies of propiconazole fungicide and unsprayed treatments was evaluated. A combination of rate and spraying frequencies of propiconazole significantly reduced disease with correspondingly increased bulb yield of garlic. The minimum percentage severity index and area under disease progress curve were scored from plots treated by all rates with three times spraying frequency of Tilt fungicide application. The highest bulb yield was obtained from plots treated with all fungicide rates with three times spraying frequencies of propiconazole application. But the highest (6896.36%) marginal rate of return was obtained from plots treated with 0.5 L with two times spraying. Generally, 0.5 liters with two times spraying of propiconazole was effective in controlling garlic disease and get the highest cost-benefit advantage as compared with other treatments. Therefore, it could be recommended for the management of garlic rust in Ethiopia.
Highlights
Garlic (Allium sativum L.) belongs to the Alliaceae family, and it is an important edible bulbous crop [1]. e origin of garlic is assumed to be in Central Asia and has spread to other countries through trade and colonization [2]
Garlic rust assessment was started in both locations at 72 days after planting (DAP) (Tables 1 and 2)
A significant difference (p < 0.05) among treatments was recorded for bulb yield at both locations (Tables 4 and 5). e highest (8047 kg ha −1) bulb yield was obtained from plots that were treated with 1.25 L with three times spraying frequency of propiconazole and the lowest (4660 kg ha −1) found from untreated control plots at Kabe (Table 4)
Summary
Garlic (Allium sativum L.) belongs to the Alliaceae family, and it is an important edible bulbous crop [1]. e origin of garlic is assumed to be in Central Asia and has spread to other countries through trade and colonization [2]. Garlic has been used in China and India for more than 5000 years, and in Egypt since 2000 BC [3]. It is the foremost important crop and ranks second next to onion within the world [4]. Garlic is one of the main vegetable crops in the world and used as a seasoning in many foods throughout the globe. It has medicinal value which is well known within the control and treatment of hypertension, worms, germs, bacterial and fungal diseases, diabetes, cancer, ulcer, rheumatism, etc. Garlic is one of the most important vegetable crops in Ethiopia and is used as a component of food and has a tremendous use in the formulation of local medicines
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