Effect of diethyl maleate on the toxicity of garlic (<i>Allium sativum</i>L.) extract to<i>Tribolium castaneum</i>Herbst under laboratory conditions

Garlic oil (GO) and cinnamon oil (CO) was successfully loaded in chitosan (CS) based polymeric nanoparticles (NPs). Fumigant, contact toxicities and persistent efficacy of these new Chitosan nano particles (CSNPs) were examined against Tribolium castaneum (T. castaneum) as a common stored product pest. Different ratios of polymer to sodium tripolyphosphate cross-linker were applied for NPs preparation. Stability of CSNPs loaded with oils was examined for 4 months. Bioassay tests were used to determine LC 50 values for fumigant toxicity evaluation and contact effects on red flour beetle, T. castaneum. The optimized CSNPs containing GO and CO had the particle size of 231.1 ± 7.5 nm and 303.4 ± 10 nm with encapsulation efficiency of 76.78% and 86.81%, respectively.Characterization results based on transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD) indicated the successful formation of CSNPs with spherical morphology, amorphous property, and high stability during the storage time. LC 50 index of pure oils and their nanoformulations suggested that CSNPs loaded oils have higher fumigant and contact effects on T. castaneum in a lower concentration than pure oils. Lethal effectiveness of CSNPs loaded GO and CO against T. castaneum were 18 and 20 days, respectively. However, GO and CO pure oils lost their efficacy in 10 and 14 days after exposure, respectively.

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“…The 2–7 day old adults were used for bioassays. The cultures were maintained in the dark and growth chamber set at 27 ± 1°C and 60 ± 5% RH 37 …”

Section: Methodsmentioning

confidence: 99%

Polymeric nanoparticles containing different oils as insecticides against the storage pest Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae)

Khandehroo

Moravvej

Farhadian

et al. 2022

J of Applied Polymer Sci

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Effect of diethyl maleate on the toxicity of garlic (Allium sativumL.) extract toTribolium castaneumHerbst under laboratory conditions

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References 22 publications

Polymeric nanoparticles containing different oils as insecticides against the storage pest Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae)

Polymeric nanoparticles containing different oils as insecticides against the storage pest Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae)

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