The main aggregation pheromone component(1)of stored grain pest,Cryptolestes Pusillus, was synthesized with organosilicon and organolithium reagents in an overall yield of 18% from 1,7- heptanediol.
Only two fungus species,Beauveria bassiana and Metarhizium anisopliae,have been given serious attention as possible microbial controls for stored-product pests.Their host ranges are broad,but their potency for the var...Only two fungus species,Beauveria bassiana and Metarhizium anisopliae,have been given serious attention as possible microbial controls for stored-product pests.Their host ranges are broad,but their potency for the various target insects varies greatly,and some of the most important pests such as the red flour beetle are very tolerant of fungi.Accordingly,strategies are needed to improve the fungal performance.One such strategy is combination with other environmentally benign treatments such as controlled desiccant dusts and controlled atmospheres.Ironically the relatively dryness of stored-product environments favors fungal efficacy.Desiccation stress renders some insects more vulnerable to fungi.The longevity of fungus spores is also best under dry conditions.The prospects of fungi for control of stored-product pests can be improved by taking advantage of these phenomena and judicious selection of use venues and application strategies.展开更多
The potential for using imidacloprid （a neonicotinoid） and indoxacarb （an oxadiazine） as grain protectants was investigated in bioassays against resistant strains of five stored grain beetles. The species investig...The potential for using imidacloprid （a neonicotinoid） and indoxacarb （an oxadiazine） as grain protectants was investigated in bioassays against resistant strains of five stored grain beetles. The species investigated were Rhyzopertha dominica （E） （the lesser grain borer）, Sitophilus oryzae （L.） （the rice weevil）, Tribolium castaneum （Herbst） （the rust-red flour beetle）, Oryzaephilus surinamensis （L.） （the saw tooth flour beetle）, and Cryptolestesferrugineus （Stephens） （the fiat grain beetle）. Each of these species has developed resistance to one or more protectants, including organophosphorus insecticides, synthetic pyrethroids and the juvenile hormone analogue methoprene. Mortality and re- production after a 2-week exposure of adults to treated wheat depended on species, dose and insecticide. Imidacloprid had no effect on S. oryzae at any dose, but none of the other species produced any live progeny at 10 mg/kg. Indoxacarb had no effect on T. castaneum at any dose, but none of the other species produced any live progeny at 5 mg/kg. The results show that although both imidacloprid and indoxacarb can control at least four of the five key pests tested at doses comparable to those used for organophosphorus protectants, more potent neonicotinoid or oxadiazine insecticides would be needed than either of these to provide broad spectrum protection of stored grain .展开更多
The genus Omonadus Mulsant & Rey from China is reviewed, including a newly recorded species, O. cintomus(Marseul) and another four species and subspecies: O. confucii confucii(Marseul), O. confucii addendus(Krekic...The genus Omonadus Mulsant & Rey from China is reviewed, including a newly recorded species, O. cintomus(Marseul) and another four species and subspecies: O. confucii confucii(Marseul), O. confucii addendus(Krekich-Strassoldo), O. floralis(Linnaeus) and O. formicarius formicarius(Goeze). All species checked are redescribed and illustrated. An identification key for this species from China is presented. The study was based on specimens from the Insect Collection, School of Agriculture, Ningxia University(SANXU) and Institute of Zoology, Chinese Academy of Sciences(IZCAS).展开更多
文摘The main aggregation pheromone component(1)of stored grain pest,Cryptolestes Pusillus, was synthesized with organosilicon and organolithium reagents in an overall yield of 18% from 1,7- heptanediol.
文摘Only two fungus species,Beauveria bassiana and Metarhizium anisopliae,have been given serious attention as possible microbial controls for stored-product pests.Their host ranges are broad,but their potency for the various target insects varies greatly,and some of the most important pests such as the red flour beetle are very tolerant of fungi.Accordingly,strategies are needed to improve the fungal performance.One such strategy is combination with other environmentally benign treatments such as controlled desiccant dusts and controlled atmospheres.Ironically the relatively dryness of stored-product environments favors fungal efficacy.Desiccation stress renders some insects more vulnerable to fungi.The longevity of fungus spores is also best under dry conditions.The prospects of fungi for control of stored-product pests can be improved by taking advantage of these phenomena and judicious selection of use venues and application strategies.
文摘The potential for using imidacloprid （a neonicotinoid） and indoxacarb （an oxadiazine） as grain protectants was investigated in bioassays against resistant strains of five stored grain beetles. The species investigated were Rhyzopertha dominica （E） （the lesser grain borer）, Sitophilus oryzae （L.） （the rice weevil）, Tribolium castaneum （Herbst） （the rust-red flour beetle）, Oryzaephilus surinamensis （L.） （the saw tooth flour beetle）, and Cryptolestesferrugineus （Stephens） （the fiat grain beetle）. Each of these species has developed resistance to one or more protectants, including organophosphorus insecticides, synthetic pyrethroids and the juvenile hormone analogue methoprene. Mortality and re- production after a 2-week exposure of adults to treated wheat depended on species, dose and insecticide. Imidacloprid had no effect on S. oryzae at any dose, but none of the other species produced any live progeny at 10 mg/kg. Indoxacarb had no effect on T. castaneum at any dose, but none of the other species produced any live progeny at 5 mg/kg. The results show that although both imidacloprid and indoxacarb can control at least four of the five key pests tested at doses comparable to those used for organophosphorus protectants, more potent neonicotinoid or oxadiazine insecticides would be needed than either of these to provide broad spectrum protection of stored grain .
基金financially supported by the National Natural Science Foundation of China(31660630,31961143002)the First-class disciplines of Prataculture Science from Ningxia University(NXYLXK2017A01)
文摘The genus Omonadus Mulsant & Rey from China is reviewed, including a newly recorded species, O. cintomus(Marseul) and another four species and subspecies: O. confucii confucii(Marseul), O. confucii addendus(Krekich-Strassoldo), O. floralis(Linnaeus) and O. formicarius formicarius(Goeze). All species checked are redescribed and illustrated. An identification key for this species from China is presented. The study was based on specimens from the Insect Collection, School of Agriculture, Ningxia University(SANXU) and Institute of Zoology, Chinese Academy of Sciences(IZCAS).
