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Journal of Ocean University of China 2020年第4期19卷 931-940页

作者： LI Yan LU Chunyu YU Zhanqiao MA Qingshan Fisheries College Ocean University of ChinaQingdao 266003China Dean’s Office Hainan Provincial Party SchoolHaikou 571100China School of Medicine and Pharmacy Ocean University of ChinaQingdao 266003China

In the present study,we isolated the lactic acid bacterium strain SC-01 from Pacific white shrimp(Litopenaeus vannamei)intestine.Using conventional and molecular methods,we identified the bacterium as Enterococcus faecium,and found it had the function of feeding attractant and could inhibit the development of Vibrio parahaemolyticus(zone of inhibition:14 mm).The attractant effect of its fermentation broth is significantly better than that of the chemical attractant trimethylamine oxide(TMAO)(Pattractant.A biosecurity evaluation revealed a negative result in hemolytic assays,and no shrimp mortality was resulted from SC-01 fermentation broth challenge.Feeding trials(60 days)indicated that the SC-01 fermentation broth(viable counts:5.7×109 cfu mL−1)could improve feed intake,weight gain rate(WGR)and specific growth rate(SGR),and decrease the count of Vibrio sp.in the intestine of shrimp.

关键词： lactic acid bacterium Enterococcus faecium probiotics attractant Litopenaeus vannamei

Development of synthetic volatile attractant for male Ectropis obliqua moths

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Journal of Integrative Agriculture 2016年第7期15卷 1532-1539页

作者： SUN Xiao-ling LI Xi-wang XIN Zhao-jun HAN Juan-juan RAN Wei LEI Shu Tea Research Institute Chinese Academy of Agricultural Sciences Key Laboratory of Tea Biology and Resources Utilization Ministry of Agriculture

The tea geometridEctropis obliquais one of the most serious leaf-feeding insect pests in tea （Camelia sinensis） in East Asia. Although several volatile chemicals emitted from tea plants have been reported to be attractive toE. obliqua moths, no synthetic attractants for E. obliqua moths have been developed. By measuring the behavioral responses of the moth to a series of chemicals in the lab, we found that a blend containing a ternary mixture containing （Z）-3-hexenal, （Z）-3-hexenyl hexanoate and benzyl alcohol clearly attracted toE. obliqua moths of both sex and that （Z）-3-hexenyl acetate could enhance the attractiveness of the ternary blend. Moreover, we found that the volatiles emitted from the plant-E. obliqua larva com-plex have the same attractiveness as： 1） the blend of volatiles containing the ternary mixture and 2） the blend containing （Z）-3-hexenyl acetate plus the ternary mixture to both male and female moths. In a ifeld bioassay, more male moths were observed on traps that were baited with the blend containing （Z）-3-hexenyl acetate plus the ternary mixture than on control traps. Our study raises the tantalizing possibility that synthetic blends could be deployed as attractants for pests in the ifeld.

关键词： attractant synthetic volatile blends Ectropis obliqua moth tea plantation

TICKET attracts pollen tubes and mediates reproductive isolation between relative species in Brassicaceae

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Science China(Life Sciences) 2019年第11期62卷 1413-1419页

作者： Jiang-Guo Meng Meng-Xia Zhang Wei-Cai Yang Hong-Ju Li State Key Laboratory of Molecular Developmental Biology Institute of Genetics and Developmental BiologyChinese Academy of SciencesBeijing 100101China Collage of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China

In flowering plants,pollen tubes are attracted to the ovule by secreted peptides to release the sperm cells for double fertilization.This process is species-specific and acts as an important stage of reproductive isolation between species.Here we identified a cysteine-rich peptide TICKET2 in Arabidopsis thaliana and its orthologs in Arabidopsis lyrata and Capsella rebella that can attract the conspecific pollen tubes,but not the pollen tubes of relative species in Brassicaceae.Genetic knockout of the AtTICKET subclade compromised the pollen tube attraction efficiency.This study identified a new pollen tube attracting signal and shed light on the molecular basis of reproductive isolation.

关键词： pollen tube attraction peptide attractant reproductive isolation

An unsettling explanation for the failure of skatole-baited ovitraps to capture Culex mosquitoes

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Insect Science 2019年第5期26卷 873-880页

作者： Marcelo H.S.Paiva Rosangela M.R.Barbosa Suzane A.Santos Norma M.Silva Marcia B.Paula Constancia F.J.Ayres Walter S.Leal Depariamento de Entomologia Instituto Aggeu MagalhaesFundagao Oswaldo CruzAv. Professor Moraes RegoRecifePEBrazil CentroAcademicodoAgreste Universidade Federalde Pernambuco CaruaruPEBrazil Departamentode Biologia Celular Embriologia e GeneticaCentro de Ciencias Biologicas Universidade Federal de Santa CatarinaFlorianopolisSC.Brazil Faculdade de Saude PCiblica Departamento de Epidemiologia Universidade de Sao PauloSao PauloSPBrazil Department of Molecular and Cellular Biology University of California-DavisDavisCaliforniaUSA

Culex mosquitoes are primarily found in temperate and tropical regions worldwide where they play a crucial role as main vectors of filarial worms and arboviruses. In Recife, a northeast city in Brazil, high densities of Culex quinquefasciatus are often found in association with human populated areas. In marked contrast to another part of the city, field tests conducted in the neighborhood of Sitio dos Pintos showed that trapping of mosquitoes in skatole-baited ovitraps did not differ significantly from captures in control (water) traps. Thus, classical and molecular taxonomic approaches were used to analyze the Culex species circulating in Sitio dos Pintos. Results obtained from both approaches agreed on the cocirculation of Culex quinquefasciatus and Culex nigripalpus in three different areas of this neighborhood. What was initially considered as an unexpected failure of this lure turned out to be a more unsettling problem, that is, the first report in Recife of Culex nigripalpus, a vector of Venezuelan equine encephalitis virus and West Nile virus. Unplanned urbanization processes close to remnants of the Atlantic forest, such as observed in Sitio dos Pintos, may have contributed to the introduction of Cx. nigripalpus in urban areas.

关键词： Culex quinquefasciatus Culex nigripalpus dengue oviposition attractant skatole West Nile virus Zika

Honeydew volatile emission acts as a kairomonal message for the Asian lady beetle Harmonia axyridis （Coleoptera： Coccinellidae）

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Insect Science 2012年第4期19卷 498-506页

作者： Pascal D. Leroy Stephanie Heuskin Ahmed Sabri Fran( ois J. Verheggen Julien Farmakidis Georges Lognay Philippe Thonart Jean-Paul Wathelet Yves Brostaux Eric Haubruge Departments of Functional and Evolutionary Entomology Departments of Analytical Chemistry University of Liege Gembloux Agro-BioTech Walloon Center of Industrial Biology University of Liege B40 4000 Sart-Tilman Departments of General and Organic Chemistry Departments of Appfied Statistics Computer Science and Mathematics University of Liege Gembloux Agro-Bio Tech Gembloux Belgium

The Asian lady beetle Harmonia axyridis Pallas is considered as an invasive species in most territories where it has been introduced. Because aphid honeydew acts as an attraetant for many aphid predators and parasitoids, the objectives of this work were to collect and identify the volatile compounds released from the aphid excretory product to evaluate how these semiochemicals could affect the H. axyridis foraging behavior. Twelve volatile chemicals were identified from the Megoura viciae Buckton honeydew including four alcohols, three ketones, three aldehydes, a pyrazine and a monoterpene. The volatiles 3-methyl-l-butanol and 3-methyl-butanal were highlighted as the two most abundant semiochemicals released from the M. viciae honeydew. Vieia faba L. plants treated with crude honeydew attracted more than 80% of the tested individuals with 40% of attracted beetles located on the plant. Four volatile compounds （3-hydroxy-2-butanone, 3-methyl-butanal, 3-methyl-1-butanol and limonene） were also highlighted to attract more than 75% of the coccinellids toward the odor source and to locate about 35% of them on the plants. Limonene was the most efficient attractant since 89% of the H. axyridis responded to this odor. The use of the identified semiochemicals as well as the composition of an artificial honeydew could certainly be helpful to control the dispersal of the Asian lady beetle H. axyridis.

关键词： aphid honeydew attractant Harmonia axyridis kairomone semiochemicals

The diurnal flight activity and influential factors of Frankliniella occidentalis in the greenhouse

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Insect Science 2010年第6期17卷 535-541页

作者： Xing-Hui Liang Zhong-Ren Lei Jin-Zeng Wen Ming-Liang Zhu State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant Protection Chinese Academy of Agricultural Sciences Beijing China

The daily flight activity of westem flower thrips, Frankliniella occidentalis （Pergande）（Thysanoptera： Thripidae） was examined using color, yellow-light and chemical attractant traps in a cucumber greenhouse and under controlled laboratory conditions. In the greenhouse, flying thrips were most abundant between hours 08：00-10：00, declined at mid-day, and then slightly increased during hours 14：00-16：00; however they decreased to a very low level at 18：00. The use of light traps showed no thrip flight activity during the night. The total number of thrips that flew onto cards on rainy or cloudy days was higher than that on sunny days. We reconfirmed that traps treated with attractant attracted 4.0-9.4 times more thrip than the untreated traps. Under laboratory controlled conditions, thrip flight activity was highest under light intensity between 4 000 and 6 000 lux, air temperature of 28℃, and RH of 70%. In addition, starved thrips flew more readily than non-starved thrips.

关键词： attractant daily flight activity Frankliniella occidentalis factors traps

Behavioral responses for evaluating the attractiveness of specific tea shoot volatiles to the tea green leafhopper, Empoaca vitis

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Insect Science 2012年第2期19卷 229-238页

作者： Dan Mu Lin Cui Jian Ge Meng-Xin Wang Li-Fang Liu Xiao-Ping Yu Qing-He Zhang Bao-Yu Han Tea Research Institute of Chinese Academy of Agricuitural Sciences Zhejiang Provincial Key Laboratory of Biometrology and Inspection&Quarantine College of Life Sciences of China Jiliang UniversityHangzhouChina Sterling International Inc.SpokaneWAUSA

The tea green leafhopper, Empoasca vitis Gothe, is one of the most serious insect pests of tea plantations in China's Mainland. Over the past decades, this pest has been controlled mainly by spraying pesticides. Insecticide applications not only have become less effective in controlling damage, but even more seriously, have caused high levels of toxic residues in teas, which ultimately threatens human health. Therefore, we should seek a safer biological control approach. In the present study, key components of tea shoot volatiles were identified and behaviorally tested as potential leafhopper attractants. The following 13 volatile compounds were identified from aeration samples of tea shoots using gas chromatography-mass spectrometry （GC-MS）：（E）-2-hexenal, （Z）-3-hexen-1- ol, （Z）-3-hexenyl acetate, 2-ethyl-1-hexanol, （E）-ocimene, linalool, nonanol, （Z）-butanoic acid, 3-hexenyl ester, decanal, tetradecane, β-caryophyllene, geraniol and hexadecane. In Y-tube olfactometer tests, the following individual compounds were identified：（E）-2- hexenal, （E）-ocimene, （Z）-3-hexenyl acetate and linalool, as well as two synthetic mixtures （called blend 1 and blend 2） elicited significant taxis, with blend 2 being the most attractive. Blend 1 included linalool, （Z）-3-hexen-l-ol and （E）-2-hexenal at a 1： 1：1 ratio, whereas blend 2 was a mixture of eight compounds at the same loading ratio：（E）-2-hexenal, （Z）- 3-hexen-l-ol, （Z）-3-hexenyl acetate, 2-penten-l-ol, （E）-2-pentenal, pentanol, hexanol and 1-penten-3-ol. In tea fields, the bud-green sticky board traps baited with blend 2, （E）-2- hexenal or hexane captured adults and nymphs of the leafhoppers, with blend 2 being the most attractive, foUowed by （E）-2-hexenal and hexane. Placing sticky traps baited with blend 2 or （E）-2-hexenal in the tea fields significantly reduced leathopper populations. Our results indicate that the bud-green sticky traps baited with tea shoot volatiles can provide a new tool for monitoring and managing the tea leafhopper.

关键词： attractant behavior green leaf volatiles tea green leafhopper tea shoot volatiles

Testing semiochemicals from aphid, plant and conspecific： attraction of Harmonia axyridis

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Insect Science 2012年第3期19卷 372-382页

作者： Pascal D. Leroy Thomas Schillings Julien Farmakidis Stephanie Heuskin Georges Lognay Francois J. Verheggen Yves Brostaux Eric Haubruge Frederic Francis Departments of Functional and Evolutionary Entomology Departments of Analytical Chemistry Departments of Applied Statistics Computer Science and Mathematics University of Liege Gembloux Agro-Bio Tech Gembloux Belgium

Harmonia axyridis Pallas （Coleoptera： Coccinellidae） is an invasive specie affecting the dynamics and composition of several guilds. Nowadays, no biological control method is available to reduce the populations of this harmful coccinellid. attractants and semiochemicals seem to be the best alternative but only few studies have tested the impact of semiochemicals on this Asian lady beetle. In this work, through wind- tunnel experiments, semiochemicals from aphids （Z,E-nepetalactone, [E]-β-farnesene, a-pinene and β-pinene）, from coccinellids （[-]-β-earyophyllene） and from the nettle Urtica dioica L. were evaluated as potential attractants. The nettle volatile compounds （[Z]-3- hexenol and [E]-2-hexenal） were extracted using a Clevenger Apparatus and identified by headspace gas chromatography-mass spectroscopy. In the wind-tunnel experiments, the main components of the aphid alarm pheromone as well as a component of the aphid sexual pheromone strongly attracted both sexes of the Asian lady beetle while （-）-β- caryophyllene only attracted few individuals and had no impact on the males. The nettle extract as well as the （Z）-3-hexenol oriented both males and females to the odor source. The （E）-2-hexenal was shown to have no effect on females even if this green leaf volatile attracted males. Because Z,E-nepetalactone was identified as the most efficient attractant in the wind-tunnel experiments, this volatile was also tested in a potato field where H. axyridis has been showed to respond to this semiochemical. This study highlighted that Z,E-nepetalactone orientated the Asian lady beetle H. axyridis under natural condi- tions, indicating that this volatile compound could certainly help for an efficient biological control approach against this invasive specie.

关键词： aphids attractant Harmonia axyridis plant semiochemicals wind-tunnel

Attraction of bruchid beetles Callosobruchus chinensis (L.) (Coleoptera: Bruchidae) to host plant volatiles

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Journal of Integrative Agriculture 2020年第12期19卷 3035-3044页

作者： WANG Hong-min BAI Peng-hua ZHANG Jing ZHANG Xue-min HUI Qin ZHENG Hai-xia ZHANG Xian-hong College of Agricultural Economics and Management Shanxi Agricultural UniversityTaigu 030801P.R.China College of Plant Protection Shanxi Agricultural UniversityTaigu 030801P.R.China Institute of Plant Protection Tianjin Academy of Agricultural SciencesTianjin 300384P.R.China

Host-plant volatiles play an important role as cues for herbivores in search of resources, mates and oviposition sites in complex environments. Plant volatile-based attractants can be developed for pest monitoring and control. Previously, we indicated that mated female adults of Callosobruchus chinensis showed choice preference behavior toward 2-hexenal and benzaldehyde. Our objective here was to investigate the synergistic effect of host-derived attractive volatiles in attracting C. chinensis under laboratory and field conditions in Shanxi Province, China. We hypothesized that the ratio and concentration of volatiles derived from Vigna radiata play critical roles for C. chinensis in locating this host. Therefore, we collected and identified the volatiles of mungbean by using headspace collection and GC-MS. The effectiveness of different ratios and concentrations of two compounds (2-hexenal and benzaldehyde) that elicit C. chinensis searching behavior were examined in Y-tube olfactometer assays. The combination of 300 μg μL^–1 2-hexenal and 180 μg μL^–1 benzaldehyde loadings exhibited a synergistic effect on attracting C. chinensis (82.35%). Compared to control traps, the adults were significantly attracted to traps baited with blends, and more attraction to females than males was found for blend traps in the field experiments. Our results suggest that blends of this specific concentration and ratio of benzaldehyde and 2-hexenal can be used in traps as attractants for C. chinensis monitoring and control in the field.

关键词： Callosobruchus chinensis plant volatiles synergistic effect olfactometer attractant

Yeast-generated CO2:A convenient source of carbon dioxide for mosquito trapping using the BG-Sentinel?traps

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Asian Pacific Journal of Tropical Biomedicine 2017年第10期7卷 896-900页

作者： dhanique c.t.jerry terry mohammed azad mohammed University of the West Indies St AugustineTrinidad and Tobago

Objectives: To evaluates carbon dioxide(CO_2) production from yeast/sugar mixtures and its efficiency as an attractant in BG-Sentinel traps.Methods: The rate of CO_2 production was optimized for different yeast/sugar mixtures.The optimized mixture was then used as bait in BG-Sentinel traps. The efficiency of this bait was then compared to octenol baited traps.Results: The yeast/sugar(5g: 280g) in 300 m L water generated the highest volume of CO_2. The CO_2 baited traps caught significantly more mosquitoes than octenol baited traps.Conclusions: Yeast-produced CO_2 can effectively replace octenol baits in BG traps.This will significantly reduce costs and allow sustainable mass-application of the CO_2 baited traps in large scale surveillance programs.

关键词： Trinidad and Tobago Carbon dioxide bait BG sentinel trap attractant