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Insecticidal activity of n-hexane extract of P. crispa (HPC) on N. cinerea cockroaches. The results were expressed as the number of dead animals per dose. Statistical analyses were performed by one-way ANOVA followed by the Dunnett’s test. * p < 0.05 (n = 3); *** p < 0.001 (n = 3), compared to control 10% DMSO.
