2018 Volume 5 Issue 2

Efficacy of Essential Oils against Oryzaephilus Surinamensis L. (Coleop-tera: Silvanidae) and Application to Packaging Film by Extrusion Coat-ing

Pangnakorn U., Chuenchooklin S.

This study was carried out to investigate the toxicity properties of essential oils against saw-toothed grain beetle Oryzaephilus surinamensis L. The highest efficiency of the essential oils from 5 plants: lemon grass Cymbopogon citratus Stapf, citronella grass Cymbopogon nardus Linn, pomelo peel Citrus maxima (Burm) Merr, eucalyptus Eucalyptus globulus Labill, and kaffir lime peel Citrus hystrix was selected and applied on extrusion coating film for rice storage life. The toxicity test was evaluated under laboratory conditions by using two methods, namely Topical Application Method (contact poison) and Residual Exposure Method (inhalation poison or fumigant toxicity). Mortality of the adult saw-toothed grain beetle Oryzaephilus surinamensis was observed and recorded every 12 hours until 72 hours. The results revealed that lemon grass and kaffir lime peel achieved a high mortality of saw-toothed grain beetle at 86.66 % and 76.67% by topical application and at 100% and 93.33% by residual exposure respectively. A lower toxicity of treatments was found for pomelo and wood vinegar. Hence, lemon grass oil, kaffir lime peel oil and citronella grass oil were selected and applied to extrusion coating film formed into bags to test for its ability to extend the storage life of rice. One month after observing the infestation of store product pests, the 1% of lemon grass oil, kaffir lime oil and citronella grass oil show significant protection against the saw-toothed grain beetle Oryzaephilus surinamensis L., throughout the experiment when compared to the control (uncoated). Additional, the essential oils may be useful as a grain protectant with extrusion coating film against the other stored product insects infested rice in the coated bags including red flour beetle Tribolium castaneum (Herbst) and rice weevils Sitophilus oryzae Linn.


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Entomology and Applied Science Letters is an international peer reviewed publication which publishes scientific research & review articles related to insects that contain information of interest to a wider audience, e.g. papers bearing on the theoretical, genetic, agricultural, medical and biodiversity issues. Emphasis is also placed on the selection of comprehensive, revisionary or integrated systematics studies of broader biological or zoogeographical relevance. Papers on non-insect groups are no longer accepted. In addition to full-length research articles and reviews, the journal publishes interpretive articles in a Forum section, Short Communications, and Letters to the Editor. The journal publishes reports on all phases of medical entomology and medical acarology, including the systematics and biology of insects, acarines, and other arthropods of public health and veterinary significance.
Issue 2 Volume 7 - 2020
Call for Papers
Entomology and Applied Science Letters supports the submission of entomological papers that contain information of interest to a wider reader groups e. g. papers bearing on taxonomy, phylogeny, biodiversity, ecology, systematic, agriculture, morphology. The selection of comprehensive, revisionary or integrated systematics studies of broader biological or zoogeographical relevance is also important. Distinguished entomologists drawn from different parts of the world serve as honorary members of the Editorial Board. The journal encompasses all the varied aspects of entomological research. This has become the need felt in scientific research due to the emphasis on intra-, inter-, and multi-disciplinary approach.