Influence of molecular descriptors of plant volatilomics on fumigant action against the three major stored product beetle pests.

Plant volatilomics such as essential oils (EOs) and volatile phytochemicals (PCs) are known as potential natural sources for the development of biofumigants as an alternative to conventional fumigant pesticides. This present work was aimed to evaluate the fumigant toxic effect of five selected EOs (cinnamon, garlic, lemon, orange, and peppermint) and PCs (citronellol, limonene, linalool, piperitone, and terpineol) against the Callosobruchus maculatus, Sitophilus oryzae, and Tribolium castaneum adults. Furthermore, for the estimation of the relationship between molecular descriptors and fumigant toxicity of plant volatiles, quantitative structural activity relationship (QSAR) models were developed using principal component analysis and multiple linear regression.

Profiling of semiochemicals from three stored product beetles by headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry.

This work focuses on the profiling of semiochemicals (SCS) from , and by headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography-mass spectrometry (GC-MS) technique. Totally, 6, 9 and 8 volatile compounds (VCS) were detected from , and , respectively. As a result of pherobase analysis and preference bioassay, stearic acid (); nonanal, lauric acid and stearic acid (); stearic acid () were identified as new SCS that could be useful for integrated pest management (IPM) practices.