p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal Biota
Claim Missing Document
Check
Articles

Found 2 Documents
Search

First Record of Milk thistle (Silybum marianum, Asteraceae) as Invasive Weed Species in Urban Green Areas of Addis Ababa City, Ethiopia Kassie, Weldesenbet Beze
Biota Vol 10 No 2 (2024): Jurnal Biota 2024
Publisher : Faculty of Science and Technology Universitas Islam Negeri Raden Fatah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/biota.v10i2.21961

Abstract

With increasing globalization and trade, the rate of invasive species entering and spreading has significantly increased globally. These include various invasive insect pests, pathogens, and weeds. Since three years ago, Milk thistle, Silybum marianum, an invasive weed species, has been observed widely in urban green spaces and roadsides in Addis Ababa city, Ethiopia. Weed surveys were conducted across 42 urban green sites located in Yeka, Lemi Kura, Bole, Nifas Silk-Lafto, Kolfie Keraniyo, Akaky Kality, and Gullele sub-cities during the main rainy season from June to September 2023, with the main objective of determining the current distribution of the weed in Addis Ababa city. The urban green areas were selected by using purposive sampling techniques. Field observations confirmed that Silybum marianum can invade and colonize wide habitats and is a highly competitive invasive weed to other important native plant species. High weed density rates and dense stands of weeds were recorded in the 34 urban green areas sampled. The survey result strongly suggests fast integrated weed management options such as mowing/tilling, weeding before the plant goes to seed, cutting (stems and/or seed heads), and burning (collected plant parts and/or seed heads) into a prepared burrow were done to minimize the spreading of the weed and its ecological impacts. The purpose of this survey study is to provide information about Silybum marianum to minimize or avoid its distribution and associated impacts by following sustainable invasive weed management programs in the city before spreading to other cities in the country.
Distribution of Uromycladium acaciae disease on Acacia mearnsii woodlots; response and farmers’ cultural management practices in Fagita Lekoma district, Ethiopia Yallew, Abebaw Alene; Abtew, Asmamaw Alemu; Kassie, Weldesenbet Beze
Biota Vol 11 No 1 (2025): Jurna Biota 2025
Publisher : Faculty of Science and Technology Universitas Islam Negeri Raden Fatah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/biota.v11i1.24739

Abstract

Acacia mearnsii-based rotational cropping was introduced to Ethiopia's highlands in the past two decades for its charcoal production and soil enhancement benefits. However, since 2020, plantations have been threatened by disease infestation. This study examines the distribution of Uromycladium acaciae on Acacia mearnsii and its management options in Fagita Lekoma, Ethiopia. Using systematic sampling, 28 woodlots were established. Data collection employed transect walks, 140 household interviews, 11 informant interviews, and 3 group discussions. Plantation size was analyzed using analysis of variance, while the relationship between education level and disease management decisions was tested using chi-square with R-software. Results revealed that only 4.5-, 5.5-, and 6.5-year plantations were observed during field assessment. Plantations less than 4-year old were not observed. New plantings in the past three consecutive years were abandoned. Complete (100%) distribution occurred in woodlots aged 4.5 and 5.5 years, however, a slight reduction (90.3%) was observed in 6.5-year woodlots. Seedlings and younger trees were more damaged than mature trees. Tree producers did not implement any cultural control measures and lacked information about the occurrence, identity, and damage caused by diseases. Instead, they converted their younger plantations to other land uses and harvested older ones for fences, firewood, and charcoal. The disease was perceived as severe during the rainy seasons (74.6%). Most respondents (94.3%) were still interested in production and related activities, while 5.7% were strongly discouraged. Commencing plantations with a mix of non-target, fast-growing, and environmentally-friendly trees is ideal. Research on the integrated management of Uromycladium acaciae should be strengthened.