Evaluation of the Adulticiudal Efficacy of Multi-Active Inmsecticide (Cypermethrin + Tetramethrin + PBO) on Housefly (Musca domestica)

Date

2024

Degree

Doctor of Veterinary Medicine

Adviser/Committee Chair

Joseph F. Dela Cruz

Abstract

Effective chemical control of housefly (Musca domestica) infestations is imperative in light of mounting pest management challenges, e.g., insecticide resistance and residue accumulation, accompanying the growth of the local poultry industry. Thus, bioefficacy testing, particularly for formulations with adjusted concentrations or synergist additions, becomes vital to guarantee safety, cost-effectiveness, and sustainability while providing information into local pest resistance and susceptibility patterns. The present study evaluated the adulticidal efficacy of cypermethin 12% + tetramethin 4% + piperonyl butoxide 16% against M. domestica under field conditions. The assay was conducted by administering the multi-active insecticide on adult housefly populations at dosage rates of 1 mL mixture per 120 mL distilled water (dH≥O) (0.83% v/v) and 1 mL mixture per 70 mL dH≥ (1.41% v/v) and application rates of 50 mL/m2 and 100 mL/m2. Mean and rate of mortality were recorded at specific time marks over the 180-minute duration of the experiment, with each treatment having five replicates. Results showed a dose-dependent relationship between the insecticide and the test organism, showing increased mortality in groups treated with higher insecticide concentration and optimal efficacy at a dosage of 1:70 and application rate of 100 mL/m2. Moreover, half-rate application (50 mL/m2) at the same dosage produced comparable mortality, indicating its potential as an economical alternative to the full-rate application especially in non-production settings. Future research may explore evaluating the knockdown effect of this mixture against houseflies while laboratory assessments could validate the study's findings in a more controlled environment.

Language

English

Location

UPLB College of Veterinary Medicine (CVM)

Notes

Awards: Compania J.M. Inc. Best Undergraduate Thesis Award in Veterinary Pharmacology

Document Type

Thesis

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