Investigating the effect of the pesticide obtained from straw by the pyrolysis process on the Pseudomonas aeruginosa and Pectobacterium carotovorum microorganisms and the Macrophomina phaseolina fungus

Subject Areas :

Fatemeh Khojastehrad ¹ , Mortaza Gholizadeh ² , Reza Khakvar ³

1 - Ph.D. Student of Chemical Engineering, Faculty of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, Iran.
2 - Associat Prof. of Chemical Engineering, Faculty of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, Iran.
3 - Associat Prof. of Plant Pathology, Department of Plant Pathology, Faculty of Agriculture, University of Tabriz, Tabriz, Iran.

Received: 2022-11-28 Accepted : 2023-03-06 Published : 2023-05-22

Keywords: Pesticide, pyrolysis, phenolic compounds, Bio-oil,

Abstract :

In this research, the possibility of producing pesticide from straw by using pyrolysis process at 500 °C was investigated. In the pyrolysis products, compounds such as phenol and carboxylic acid as well as highly polar fatty acids such as hexadecanoide and octadecanoide were identified by gas chromatography-mass spectrometer. The separation of these compounds during bio-oil production can provide a source of effective pesticide compounds. Therefore, the aqueous parts of the bio-oil of straw were separated. After optimizing the extraction of pesticide in water, its pesticidal properties was investigated on the Pseudomonas aeruginosa and Pectobacterium carotovorum microorganisms, and the Macrophomina phaseolina by the direct agar disk method. On Pectobacterium carotoverum, larger halo radii were formed by the pesticide with 0.57 weight percentage, which indicates the greater inhibitory property of this weight percentage of the pesticide. By using a high-performance liquid chromatography device, it was determined that the aqueous parts contain many phenolic compounds. So, it can be concluded that the aqueous extract extracted from straw bio-oil can be a pesticide with the potential to replace artificial and synthetic pesticides.

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