scholarly journals Natural insecticides for the control of urticating ant, Tetramorium aculeatum Mayr (Hymenoptera: Formicidae) in a coffee plantation of Southwestern Ethiopia

Heliyon ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. e06546
Author(s):  
Sisay Kidanu ◽  
Ferdu Azerefegne ◽  
Esayas Mendesil
Keyword(s):  
Coffee Plantation ◽  
Southwestern Ethiopia ◽  
Natural Insecticides

Association of Mycoflora with Coffee (Coffea arabica L.) Beans at Limmu Coffee Plantation, Southwestern Ethiopia

2015 ◽  
Vol 14 (3) ◽  
pp. 136-141 ◽  
Author(s):  
Fikre Lemessa ◽  
Amsalu Abera ◽  
Girma Adunga ◽  
Weyessa Garedew
Keyword(s):  
Coffea Arabica ◽  
Coffee Plantation ◽  
Southwestern Ethiopia ◽  
Coffea Arabica L

Larvicidal Activity of Essential Oils Against Aedes aegypti (Diptera: Culicidae)

2020 ◽  
Vol 26 (33) ◽  
pp. 4092-4111
Author(s):  
Mikael A. de Souza ◽  
Larissa da Silva ◽  
Maria A. C. dos Santos ◽  
Márcia J. F. Macêdo ◽  
Luiz J. Lacerda-Neto ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Essential Oils ◽  
Larval Mortality ◽  
Analytical Techniques ◽  
Extraction Methods ◽  
Control Programs ◽  
Plant Parts ◽  
Natural Insecticides ◽  
Methods Analytical ◽  
Meta Analyses

The Aedes aegypti is responsible for the transmission of arboviruses, which compromise public health. In the search for synthetic product alternatives, essential oils (OEs) have been highlighted by many researchers as natural insecticides. This systematic review (SR) was performed according to PRISMA guidelines (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) and its objective was to evaluate studies addressing OEs with larvicidal properties against Ae. aegypti, through electronic database searches (Pubmed, Science Direct and Scielo), covering an overview of the plant sources OEs, which plant parts were used, the extraction methods, analytical techniques, major and/or secondary constituents with greater percentages, as well as the LC50s responsible for larval mortality. Following study analysis, plants distributed across 32 families, 90 genera and 175 species were identified. The Lamiaceae, Myrtaceae, Piperaceae, Asteraceae, Rutaceae, Euphorbiaceae and Lauraceae families obtained the highest number of species with toxic properties against larvae from this vector. Practically all plant parts were found to be used for OE extraction. Hydrodistillation and steam distillation were the main extraction methods identified, with GC-MS/GC-FID representing the main analytical techniques used to reveal their chemical composition, especially of terpene compounds. In this context, OEs are promising alternatives for the investigation of natural, ecologically correct and biodegradable insecticides with the potential to be used in Ae. aegypti control programs.

scholarly journals Sources and level of heavy metal contamination in the water of Awetu watershed streams, southwestern Ethiopia

Heliyon ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. e06385
Author(s):  
Higemengist Astatkie ◽  
Argaw Ambelu ◽  
Embialle Mengistie Beyene
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Heavy Metal Contamination ◽  
Southwestern Ethiopia

scholarly journals The critical thinking dispositions of students around coffee plantation area in solving algebraic problems

2018 ◽  
Vol 7 (2.10) ◽  
pp. 18
Author(s):  
Kurniati Dian ◽  
Zayyadi Moh
Keyword(s):  
Critical Thinking ◽  
Junior High School ◽  
Video Recording ◽  
Thinking Skills ◽  
Critical Thinking Skills ◽  
Research Subjects ◽  
Coffee Plantation ◽  
Thinking Dispositions ◽  
Critical Thinking Dispositions ◽  
Thinking Disposition

The present study aimed at describing the dispositions of students around a coffee plantation in solving algebraic problems, especially those pertaining to fraction and comparison. Critical thinking disposition denotes the initial milestone to developing students’ critical thinking skills. The study investigated four components of critical thinking dispositions, comprising of truth-seeking, open-mindedness, self-confidence, and inquisitiveness. The subjects under investigation were 45 students at the second grade of a junior high school situated around Garahan coffee plantation in Jember district, East Java, Indonesia. The study covered several phases, inter alia, (1) describing problems on Algebra to the students, (2) recording any activities of the research subjects when doing tasks given, (3) analyzing the students’ answer sheets based on four components of critical thinking dispositions, (4) conducting method triangulation projected to confirm the preliminary findings on the students critical thinking dispositions, and (5) determining the students’ critical thinking dispositions based on the results of direct observation, video recording, and interview. The study gained several findings related to the students’ dispositions. First, the students’ tendency in truth-seeking was characterized by their analysis on the problems given on themes regarding coffee. This prevented them from making mistakes as they checked some information, be it known or unknown, as the bases for problem solving. However, not every student was aware of what was unknown about the problem or what was required to solve the problem. Second, their tendency in open-mindedness was evinced by the fact that they were assured of their answer as they related it to their experience in planting coffee. Nevertheless, some students tended to ask their parent when they had to determine the amount of diameter comparison between two logs to be connected. Third, they tended to be confident in solving problems given as they had experienced the activities described in the problem when they assisted their parents in planting coffee, but still some students had yet to be sure of their answers as they lacked the experience in planting coffee. Lastly, they tended to possess sound inquisitiveness concerning various issues pertinent to solving algebraic problems, especially themed on coffee. They acquired the inquisitiveness by observing the actual activity in their environment. Nonetheless, their inquisitiveness could not be generalized to algebraic lessons at school. 

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