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Study on the Effectiveness of Fertilization with Harmal Plant in Killing or Inhibiting the Movement of Nematodes in Plants
Organization(s):Um thar alghfari basic school
Country:Oman
Student(s):Prepared by: Al Yazia Al Rashidi
And: Salima Al Rashidi
Grade Level:Secondary School (grades 9-12, ages 14-18)
GLOBE Educator(s):Muna Amer Albadi
Contributors:Supervised by: Ms. Mona Al Badi
Report Type(s):International Virtual Science Symposium Report
Protocols:Air Temperature, Relative Humidity, Surface Temperature, Soil pH, Soil Temperature
Presentation Poster:
View Document
Language(s):English
Date Submitted:02/28/2025
The research aimed to study the effectiveness of using Peganum harmala (Harmal) plant fertilization in killing or inhibiting the movement of nematodes in plants. Conducted in Al Buraimi Governorate, Oman, the study was prompted by observations of declining tree growth, yellowing leaves, and gradual plant death. The Globe Environmental Team collaborated with relevant authorities and the STEM team to investigate the issue and develop solutions.
Field visits were conducted, and soil properties at the study site were analyzed, including pH, color, conductivity, and salinity. A Harmal extract was prepared by drying the plant's leaves and applying it to nematode-infected plants. Two soil samples were studied: a control sample (untreated soil) and an experimental sample (soil treated with Harmal leaves). The team also collaborated with Sultan Qaboos University to analyze Harmal leaves using High-Performance Liquid Chromatography (HPLC) to identify chemical compounds and determine the optimal extract concentration for combating nematodes.