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Pesticidal Activities of Some Schiff Bases Derived from Benzoin, Salicyl-aldehyde, Aminophenol and 2,4 Dinitrophenyl Hydrazine

M. M. Ali
Department of Applied Chemistry and Chemical Technology, Rajshah, University, Rajshahi-6205

M. Jesmin
Department of Applied Chemistry and Chemical Technology, Rajshah, University, Rajshahi-6205

S. M. A. Salam
Department of Applied Chemistry and Chemical Technology, Rajshah, University, Rajshahi-6205

J. A. Khanam
Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi-6205

M. F. Islam
Department of Biochemistry and Molecular Biology, Rajshahi University, Rajshahi-6205

M. N. Islam
Department of Zoology, Rajshahi University, Rajshahi-6205

Abstract/ Executive Summary:

The pesticidal activities of three Schiff bases namely PDH [N- (1 phenyl 2 hydroxy 2 phenyl ethylidine) 2′4′ dinitrophenyl hydrazine], PHP [N(1-phenyl 2 hydroxy -2 phenyl ethylidine) 2′ hydroxy phenyl imine] and HHP [N (2-hydroxy benzylidine) 2′ hydroxy phenyl imine] derived from benzoin, salicylaldehyde, 2 aminophenol and 2,4 dinitrophenyl hydrazine were evaluated against Tribolium castaneum. Probit mortality were studied by surface film treatment method at different doses of the compounds. The results showed that the LD50 values as recorded after 24 hours of treatment were 15.1268, 3.0922 and 3.0922 mg /cm² for PDH, PHP and HHP, respectively as compared with 0.2416 mg/cm² for a standard pesticide λ-cyhalothrin. With Schiff base complexes of cobalt(II), copper(II) and zinc(II), the LD50 values were 1.5206, 14.8576 and 3.2829 mg/cm² respectively. Better results were obtained when recorded with longer treatment time. These three compounds may, therefore, be considered as potent pesticides.

Keywords: Pesticidal activities; Schiff bases; Surface film treatment method.

Location: “Crop Protection and Toxicology Laboratory”, Department of Zoology, Rajshahi University, Bangladesh

Start Date:

End Date:

Program Area: Pest Management

Non-commodity: Performance

Objectives:

In the present paper, we have studied the pesticidal activities of these three compounds (PDH, PHP and HHP) against the pest Tribolium castaneum.

Methodology:

Chemicals All chemicals used during the research work were purchased from BDH (England) and used as received. Insects Adults of red flour beetle Tribolium castaneum were used for the experiment. They were collected from the “Crop Protection and Toxicology Laboratory”, Department of Zoology, Rajshahi University, Bangladesh. Experimental detail Residual film treatment was followed for the experiment. The compounds were dissolved in alcohol and then poured in to the petridishes (60 mm diameter) and allowed them to dry. Pilot experiments were done to obtain doses in which mortality rate was in between 10 to 90%. The actual dose was calculated from the amount of the compounds present in 1 ml of the solution. The amount of the active ingredient was expressed in mg/cm². For PDH, the doses were 0.708, 1.414, 2.123, 2.831 and 3.539 mg/cm² and for both PHP and HHP, the doses adjusted were 0.354, 0.708, 1.062, 1.414 and 1.709 mg/cm². Thirty insects were released in each of treated petridishes. All the petridishes were kept in an incubator at a fixed temperature (30±0.5°C). A control experiment was also conducted by applying the solvent only instead of the solution under similar condition. The mortality of these beetles was observed by every 24 hours and the data were recorded. A simple microscope was used to check each and every beetle by tracing natural movement of its organ.

Source of Information: J. Sci. Res. 1 (3), 641-646 (2009)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

All the Schiff bases are fairly active in killing pest Tribolium castaneum. The compounds specially PHP and HHP may be considered as effective pesticides.

Knowledge Management: Journal