Abstract

Aim: The aim of the study was to evaluate distribution and quantifying incidence and severity of garlic white rot disease and the associated environmental factors and cultural practices in northwestern Amhara region, Ethiopia.

Materials and Methods: Survey was conducted in twelve districts of 71 garlic fields in 2020/21 main cropping season. Field survey was conducted by using random sampling technique in 7-10 km intervals based on vehicle odometers following the main roads and accessible routes and growers were interviewed using structured questioner to obtain information on cropping systems and cultural practices.

Results: Survey results indicated that white rot was widely distributed in all garlic growing areas of the surveyed districts. The assessment results showed that about 47.89% of the fields were infested with white rot. Then, incidence of white rot was assessed by counting the number of plants showing white rot symptoms. Disease intensity was varied among districts, variety grown, plant density, cropping pattern, previous crop grown, tillage frequency, slop of fields, temperature, soil type and field management practices. Among the districts surveyed the highest 100% disease prevalence was recorded in Dera district followed by Bahirdar district recorded 75.0% disease prevalence. The higher disease incidence 43.33% was recorded in Dera district was as highest disease severity 55.71% was recorded in Yilmana Densa district.

Statistics