[Objective] The aim was to study the feature extraction of stored-grain insects based on ant colony optimization and support vector machine algorithm, and to explore the feasibility of the feature extraction of stored...[Objective] The aim was to study the feature extraction of stored-grain insects based on ant colony optimization and support vector machine algorithm, and to explore the feasibility of the feature extraction of stored-grain insects. [Method] Through the analysis of feature extraction in the image recognition of the stored-grain insects, the recognition accuracy of the cross-validation training model in support vector machine （SVM） algorithm was taken as an important factor of the evaluation principle of feature extraction of stored-grain insects. The ant colony optimization （ACO） algorithm was applied to the automatic feature extraction of stored-grain insects. [Result] The algorithm extracted the optimal feature subspace of seven features from the 17 morphological features, including area and perimeter. The ninety image samples of the stored-grain insects were automatically recognized by the optimized SVM classifier, and the recognition accuracy was over 95%. [Conclusion] The experiment shows that the application of ant colony optimization to the feature extraction of grain insects is practical and feasible.展开更多
采用文献计量学分析软件CiteSpace对中国知网(CNKI)和WoS(Web of Science)核心数据库中近50年来啮虫目昆虫的文献,从宏观到微观,对发文数量、学科门类、主要国家及研究机构的合作关系、重要文献、关键词聚类以及热点研究等方面展开计量...采用文献计量学分析软件CiteSpace对中国知网(CNKI)和WoS(Web of Science)核心数据库中近50年来啮虫目昆虫的文献,从宏观到微观,对发文数量、学科门类、主要国家及研究机构的合作关系、重要文献、关键词聚类以及热点研究等方面展开计量分析.研究结果表明:①欧美国家在该领域的研究较早,国际上近10年研究热点集中在种群生长、仓储害虫书虱、物种鉴定、趋避剂和抗性机制等方面.同时,不同机构作者间的合作较为紧密,开展的研究方向较为丰富.②就中文发文情况而言,自1985年开始,国内对该领域研究的重视程度不断提高,近10年来重点聚焦仓储害虫防控层面,且不同机构的研究方向重叠度较高.因此,未来我国应当突出研究重点,加强与国外研究团队的学术合作与交流,攻克技术瓶颈,以书虱为研究对象,重点开展害虫暴发成灾的生物学和内在分子机制研究,为我国科学防治书虱等仓储害虫提供理论支撑.展开更多
In January 2005, the United States Environmental Protection Agency registered spinosad as a stored grain protectant. No referenced data on the efficacy of spinosad on corn in suppressing major stored-grain insects hav...In January 2005, the United States Environmental Protection Agency registered spinosad as a stored grain protectant. No referenced data on the efficacy of spinosad on corn in suppressing major stored-grain insects have been published. In this paper, we evaluated the efficacy of spinosad against seven major stored-grain insects on shelled corn in the laboratory. Insect species tested were the red flour beetle, Tribolium castaneum （Jacquelin duVal）; rusty grain beetle, Cryptolestesferrugineus （Stephens）; lesser grain borer, Rhyzopertha dominica （F.）; sawtoothed grain beetle, Oryzaephilus surinamensis （L.）; rice weevil, Sitophilus oryzae （L.）; maize weevil, Sitophilus zeamais （Motschulsky）; and Indian meal moth, Plodia interpunctella （Htibner）. Corn kernels were treated with spinosad at 0, 0. 1, 0.5, 1, and 2 active ingredient （a.i.） mg/kg for controlling the seven species. Beetle adults or P. interpunctella eggs were introduced into each container holding 100 g of untreated or insecticide-treated corn. The seven insect species survived well on the control treatment, produced 28 to 336 progeny, and caused significant kernel damage after 49 days. On spinosad-treated corn, adult mortality of C. ferrugineus, R. dominica, 0. surinamensis, S. oryzae, and S. zeamais was 〉 98% at 1 and 2 mg/kg after 12 days. Spinosad at≥ 0.5 mg/kg completely suppressed egg-to-larval survival after 21 days and egg-to-adult emergence of P. interpunctella after 49 days, whereas 16% T. castaneum adults survived at 1 mg/kg after 12 days. Spinosad at 1 or 2 mg/kg provided complete or near complete suppression of progeny production and kernel damage of all species after 49 days. Our results indicate that spinosad at the current labeled rate of 1 mg/kg is effective against the seven stored-grain insect pests on corn.展开更多
The booklice genus,Liposcelis(Psocodea:Liposcelididae),owns some stored product pests and have economic importance.In this study,6 booklice specimens from Sri Lanka were collected and identified based on morphological...The booklice genus,Liposcelis(Psocodea:Liposcelididae),owns some stored product pests and have economic importance.In this study,6 booklice specimens from Sri Lanka were collected and identified based on morphological and molecular data.According to the morphological and phylogenetic analyses,the samples were identified as Liposcelis entomophila.The mitochondrial gene cytochrome c oxidase I(COI)and second internal transcribed spacer(ITS2)were sequenced for phylogenetic work.The phylogenetic trees show that the samples assemble with L.entomophila together and could be distinguished with other Liposcelis spp.apparently.The genus Liposcelis and the species L.entomophila are firstly reported in Sri Lanka.展开更多
基金Supported by the National Natural Science Foundation of China(31101085)the Program for Young Core Teachers of Colleges in Henan(2011GGJS-094)the Scientific Research Project for the High Level Talents,North China University of Water Conservancy and Hydroelectric Power~~
文摘[Objective] The aim was to study the feature extraction of stored-grain insects based on ant colony optimization and support vector machine algorithm, and to explore the feasibility of the feature extraction of stored-grain insects. [Method] Through the analysis of feature extraction in the image recognition of the stored-grain insects, the recognition accuracy of the cross-validation training model in support vector machine （SVM） algorithm was taken as an important factor of the evaluation principle of feature extraction of stored-grain insects. The ant colony optimization （ACO） algorithm was applied to the automatic feature extraction of stored-grain insects. [Result] The algorithm extracted the optimal feature subspace of seven features from the 17 morphological features, including area and perimeter. The ninety image samples of the stored-grain insects were automatically recognized by the optimized SVM classifier, and the recognition accuracy was over 95%. [Conclusion] The experiment shows that the application of ant colony optimization to the feature extraction of grain insects is practical and feasible.
文摘采用文献计量学分析软件CiteSpace对中国知网(CNKI)和WoS(Web of Science)核心数据库中近50年来啮虫目昆虫的文献,从宏观到微观,对发文数量、学科门类、主要国家及研究机构的合作关系、重要文献、关键词聚类以及热点研究等方面展开计量分析.研究结果表明:①欧美国家在该领域的研究较早,国际上近10年研究热点集中在种群生长、仓储害虫书虱、物种鉴定、趋避剂和抗性机制等方面.同时,不同机构作者间的合作较为紧密,开展的研究方向较为丰富.②就中文发文情况而言,自1985年开始,国内对该领域研究的重视程度不断提高,近10年来重点聚焦仓储害虫防控层面,且不同机构的研究方向重叠度较高.因此,未来我国应当突出研究重点,加强与国外研究团队的学术合作与交流,攻克技术瓶颈,以书虱为研究对象,重点开展害虫暴发成灾的生物学和内在分子机制研究,为我国科学防治书虱等仓储害虫提供理论支撑.
文摘In January 2005, the United States Environmental Protection Agency registered spinosad as a stored grain protectant. No referenced data on the efficacy of spinosad on corn in suppressing major stored-grain insects have been published. In this paper, we evaluated the efficacy of spinosad against seven major stored-grain insects on shelled corn in the laboratory. Insect species tested were the red flour beetle, Tribolium castaneum （Jacquelin duVal）; rusty grain beetle, Cryptolestesferrugineus （Stephens）; lesser grain borer, Rhyzopertha dominica （F.）; sawtoothed grain beetle, Oryzaephilus surinamensis （L.）; rice weevil, Sitophilus oryzae （L.）; maize weevil, Sitophilus zeamais （Motschulsky）; and Indian meal moth, Plodia interpunctella （Htibner）. Corn kernels were treated with spinosad at 0, 0. 1, 0.5, 1, and 2 active ingredient （a.i.） mg/kg for controlling the seven species. Beetle adults or P. interpunctella eggs were introduced into each container holding 100 g of untreated or insecticide-treated corn. The seven insect species survived well on the control treatment, produced 28 to 336 progeny, and caused significant kernel damage after 49 days. On spinosad-treated corn, adult mortality of C. ferrugineus, R. dominica, 0. surinamensis, S. oryzae, and S. zeamais was 〉 98% at 1 and 2 mg/kg after 12 days. Spinosad at≥ 0.5 mg/kg completely suppressed egg-to-larval survival after 21 days and egg-to-adult emergence of P. interpunctella after 49 days, whereas 16% T. castaneum adults survived at 1 mg/kg after 12 days. Spinosad at 1 or 2 mg/kg provided complete or near complete suppression of progeny production and kernel damage of all species after 49 days. Our results indicate that spinosad at the current labeled rate of 1 mg/kg is effective against the seven stored-grain insect pests on corn.
基金supported by National Training Program of Innovation and Entrepreneurship for Undergraduates in China(201910019030)
文摘The booklice genus,Liposcelis(Psocodea:Liposcelididae),owns some stored product pests and have economic importance.In this study,6 booklice specimens from Sri Lanka were collected and identified based on morphological and molecular data.According to the morphological and phylogenetic analyses,the samples were identified as Liposcelis entomophila.The mitochondrial gene cytochrome c oxidase I(COI)and second internal transcribed spacer(ITS2)were sequenced for phylogenetic work.The phylogenetic trees show that the samples assemble with L.entomophila together and could be distinguished with other Liposcelis spp.apparently.The genus Liposcelis and the species L.entomophila are firstly reported in Sri Lanka.
