Insights on biorational potential of Ocimum gratissimum essential oil and its binary combination with monoterpene phenol for control of rice weevil (Sitophilus oryzae) and aflatoxigenic fungi.  

作　　者：Archana V.Remesh Ashika Raveendran K.Bincy Vasudev S.Wagh Syed G.Dastager C.S.Vivek Babu 

机构地区：[1]Food Protectants&Infestation Control (FPIC) Department,CSIR-Central Food Technological Research Institute (CSIR-CFTRI),Mysuru,570 020,Karnataka,India [2]NCIM Resource Center,CSIR-National Chemical Laboratory,Pune,411008,India [3]Academy of Scientific and Innovative Research (AcSIR),Ghaziabad,Uttar Pradesh,201002,India

出　　处：《Food Bioscience》2022年第6期300-313,共14页食品生物科学（英文）

基　　金：AVR,AR and BK,acknowledges the financial support of UGC NET-JRF Fellowship by University Grant Commissions(UGC),Delhi,India;CSV greatly acknowledges the support of CSIR Endophyte Network Project under FBR Scheme(MLP 0048)and HCP31(CSIR-ATLAS Mission);Authors,acknowledge the support of Director,CSIR-Central Food Technological Research Institute Mysore(CFTRI),570020,Karnataka for providing the necessary facilities;Authors also thank Ms.M Asha(Sr.Technical officer),CIFS,CSIR-CFTRI for assistance in GC analysis and Mr.Bhavani Eswaran M(Sr.Technical Officer)CIFS,CSIR-CFTRI for GC-MS analysis.(PMC communication number:PMC/2021-22/373).

摘　　要：Food grain storage is a difficult task due to insect infestation and subsequent mycotoxin contaminations which adversely affects the nutritional quality of grains and leading to economic loss. Current research focuses on contact and fumigant toxicity effects of essential oils (EO) and aroma compounds against Sitophilus oryzae and growth inhibition of aflatoxigenic fungi. The EO of Ocimum gratissimum comprised of thymol (46.8%), γ-terpinene (14.04%) along with o-cymene (11.76%). Also, Cymbopogon flexuosus rich in citral (76.3%) and geraniol (84.6%) and Cymbopogon nardus having geraniol (49.24%) and geranyl acetate (20.9%) were all evaluated using a dose of 25 μL (Conc∼833.3 μL/L air) against S. oryzae . All the compounds showed significant mortality (>95%) at 24 h of exposure. The insecticidal property of O. gratissimum oil chemotype showed a strong contact and fumigant toxicity against S. oryzae at a highest dose of 25 μL (Conc∼833.3 μL/L air) within 24 h. It has been further evaluated on three aflatoxigenic fungal strains which showed reduction in growth and aflatoxin content (Aflatoxin B and G), which was markedly reduced upon the treatment. The binary mixture interaction of O. gratissimum oil with monoterpene phenol (carvacrol) was assessed and the specific binary mixture of 80:20 ratio (having additive property) acts as a contact insecticide with 100% mortality. Hence, essential oil of less explored Ocimum species (O. gratissimum ) and its binary mixture could be deployed as potential biorational for control of rice weevil (Sitophilus oryzae ) and aflatoxigenic Aspergillus spp.

关 键 词：Ocimum gratissimum Essential oil Sitophilus oryzae Aflatoxigenic fungi Binary combination 

分 类 号：O62[理学—有机化学]