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Insect Science 2007年第6期14卷 497-502页

作者： FENG GAO XIANG-HUI LIU FENG GE State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of Zoology Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences Beijing China

Energy budgets of larval stages of the Chinese green lacewing, Chrysopa sinica （Tjeder）（Neuroptera： Chrysopidae） were determined under laboratory conditions at photoperiod of 14：10 L：D, 27 ± 1℃ and 75% ± 2% RH. The energy used as ingestion, assimilation, respiration, productivity and feces was constructed for each developmental stage. In addition, under these experimental conditions, the potential of C. sinica as a biological control agent was evaluated according to the ingestion by this predator and the energy content of cotton aphid, Aphis gossypii （Glover）（Homoptera： Aphididae）. The larval stage of C. sinica was able to consume 1281.4 1-day-old aphids, 1018.7 2-day-old aphids, 626.9 3-day-old aphids, 393.5 4-day-old aphids, 312.1 5-day-old aphids or 203.5 9-day-old aphids, respectively. No significant difference was detected between the estimated number of aphids consumed by the lacewings using energetic methods and the actual number of aphids consumed by the lacewings in this experiment. Our results showed that C. sinica is an important natural enemy of the cotton aphid, and energetic methods are very useful to quantify biological control efficacy of natural enemies.

关键词： Aphis gossypii biological control Chrysopa sinica ecological efficiency,energy budget predation

Identification and Characterization of Lysobacter enzymogenes as a biological control Agent Against Some Fungal Pathogens

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Agricultural Sciences in China 2009年第1期8卷 68-75页

作者： QIAN Guo-liang HU Bai-shi JIANG Ying-hua LIU Feng-quan Department of Plant Pathology College of Plant Protection Nanjing Agricultural University~Key Laboratory of Monitoring and Managementof Crop Diseases and Pest Insects Ministry of Agriculture Nanjing 210095 P.R.China

Strain OH11, a Gram-negative, nonspore forming, rod-shaped bacterium with powerful antagonistic activity, was isolated from rhizosphere of green pepper in Jiangsu Academy of Agricultural Sciences of China and characterized to determine its taxonomic position. 16S rRNA gene sequence analysis revealed that strain OH11 belongs to the Gammaproteobacteria and had the highest degree of sequence similarity to Lysobacter enzymogenes strain C3 （AY074793）（99%）, Lysobacter enzymogenes strain N4-7 （U89965）（99%）, Lysobacter antibioticus strain （AB019582）（97%）, and Lysobacter gummosus strain （AB16136）（97%）. Chemotaxonomic data revealed that strain OHI 1 possesses a quinine system with Q-8 as the predominant compound and C15：0 iso, C17：1 iso ω9c as the predominant iso-branched fatty acids, all of which corroborated the assignment of strain OH11 to the genus Lysobacter. Results of DNA-DNA hybridization and physiological and biochemical tests clearly showed that strain OH11 was classified as Lysobacter enzymogenes. Strain OH11 could produce protease, chitinase, and β-1,3-glucanase. It showed strong in vitro antifungal activity against Rhizoctonia solani, Sclerotinia scletotiorum, and several other phytopathogenic fungi. This is the first report of identification and characterization of Lysobacter enzymogenes as a biological control agent of plant diseases in China.

关键词： Lysobacter enzymogenes identification characterization biological control

biological control of Erwinia carotovora ssp. carotovora by Streptomyces Species

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Advances in Microbiology 2016年第2期6卷 104-114页

作者： Tinatin Doolotkeldieva Saykal Bobusheva Ayzat Suleymankisi Plant Protection Department Kyrgyz-Turkish Manas University Bishkek City Kyrgyzstan

Ten isolates of Erwinia carotovora ssp. carotovora (Ecc) were isolated from infected potato tubers of Picasso, Sante, and Nevskiy varieties collected from different regions in Kyrgyzstan. Isolates were identified as Erwinia carotovora ssp. carotovora (Ecc) by standard bacteriological techniques and pathogenicity tests on tubers and also by PCR analyses. Tests on the pathogenicity of E. carotovora ssp. carotovora (Ecc) strains to host plants by artificial inoculation have shown a high sensibility of the Picasso variety. As a result, five isolates were chosen, three isolates (EcPo1, EcPo2, and Eco3) were highly pathogenic, while two isolates (Eco4 and Eco5) were weakly pathogenic. The antagonistic bacteria, Streptomyces diastatochromogenes strain sk-6, and Streptomyces graminearuss strain sk-2, have a highly significant effect on soft rot bacteria isolates (Ecc), more than the other tested antagonistic organisms in vitro screening biotests. The Streptomyces diastatochromogenes sk-6 was selected for the control assay of storage potatoes against the most common soft rot bacterial strain in Kyrgyzstan, Erwinia carotovora sp. carotovora EcPo2. The pretreatment of potato tubers with antagonistic bacteria successfully prevented the initial infection multiplication of soft rot bacteria and reduced soft rot disease of potatoes in storage. These results justify selection of the dose 106 cells/ml of bacteria Streptomyces diastatochromogenes sk-6 for use in powdering the infected or non-infected potato tubers to suppress the development soft rot during storage. Streptomyces diastatochromogenes sk-6 as a biological disinfectant could destroy surface and internal infections, protect the tubers from the growth of phytopathogenic bacteria in the early period of their reproduction, and improve the overwintering of winter crops.

关键词： Potato Tubers Soft Rot Disease Erwinia carotovora ssp. carotovora biological control Streptomyces diastatochromogenes

biological control of Erosion of Banana Drains in Côte D’ivoire

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Agricultural Sciences 2016年第7期7卷 493-501页

作者： Kouadio Y. Prosper Boraud N’Takpé Kama Maxime Tiébré Marie-Solange Djakalia Ouattara Edouard Kouakou N’guessan Laboratory of Botany UFR Biosciences University Félix Houphou&#235 t-Boigny Abidjan C&#244 te d’Ivoire

The erosion of drains is a major limitation of the quality, the increasing of banana production and the environmental protection of industrial banana in Côte d'Ivoire. It leads inundations, death of banana trees and significant loss of production. Thence, the construction and the maintenance of drain costs too much and causes injure, snake bite, physical traumatisms, many diseases, … These events compromise the sustainable production of banana by reducing seriously worker’s the activities and finally increase the cost of production. The aim of the present work is to contribute to the sustainable development and human capacity building in the third world nations as far as banana production is concerned. The methods used so far to address this phenomenon proved inefficient. The technology innovation in this area has been to grow grass on the outer edges of the channels drained water. This resulted in a systematic reduction of erosion. Better still, it helped fertilize the soil, reduce the deportations of fertilizer and improve the quality of landscape of the plantations. Stenotaphrum secondatum is the best vegetable specie adapted to the biological control against water erosion of drains.

关键词： Banana biological control Ivory Coast Drain Environment

Evaluation of Selected Chemical,biological Fungicides,and Induced Resistance to control White Rot(Sclerotium rolfsii Sacc.)on Tomato

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Journal of Environmental Science and Engineering(A) 2022年第2期11卷 62-69页

作者： Penghaing Ly Kim Eang Tho RabyNget Socheath Ong Chanthin Ouk Savry Poeng Phanta Seng Theary Leng Socheat Chheum Division of Research and Extension Royal University of AgriculturePhnom Penh 120501Cambodia Faculty of Agronomy Royal University of AgriculturePhnom Penh 120501Cambodia

Tomato(Solanum lycopersicum)is one of the most widely grown and consumed as fresh vegetable in the world.Sclerotium rolfsii Sacc.is one of the most destructive diseases and affects more than 500 plant species.This study was conducted for“Evaluation of Selected Chemical,biological Fungicides,and Induced Resistant to control White Rot(Sclerotium rolfsii Sacc.)on Tomato”.The experiment was conducted at the Royal University of Agriculture and divided into two sections.The first section conducted under in vitro condition consists of four treatments T1 control treatment,T2 copper hydroxide,T3 azoxystrobin+difenoconazole,T4 metalaxyl+mancozeb in Nagoya Laboratory,and had been starting from 11st May to 15th May 2020.Section two was conducted in a pot in net-house which started from 1st January 2019 to 19th February 2019 and 1st January to 19th February 2020 and arranged in RCBD(Randomized Completely Block Design)with six replications and nine treatments.T0 negative control,T1 inoculate but not treatment,T2 metalaxyl+mancozeb,T3 azoxystrobin+difenoconazole,T4 copper hydroxide,T5 acibenzolar-S-methyl,T6 chicken dung+Trichoderma harzianum,T7 acibenzolar-S-methyl+chicken dung+Trichoderma harzianum,T8 acibenzolar-S-methyl+metalaxyl+mancozeb.Data were collected on colonizing diameter in vitro.For pot experiment collected on disease incidence,incubation period Based on the result under in vitro condition metalaxyl+mancozeb highly inhibited germination of Sclerotium rolfsii when compared with another treatment.However,the application of copper hydroxide seems less effective compared with control.For in pot experiment,when treated after symptom of southern blight appeared to seem less effective on the severity of southern blight.In contrast,when applied as a protectant and curative when symptoms appeared only systemic fungicide azoxystrobin+difenoconazole significantly reduced the severity of Sclerotium rolfsii and delayed incubation period while compared with other treatments(p<0.05)and was followed by metalaxyl+mancozeb,whereas

关键词： Sclerotium rolfsii Sacc. biological control Trichoderma hazianum induced resistance chemical control

Effects of Plant Growth Promoting Rhizobacteria (PGPR) on In Vitro Bread Wheat (Triticum aestivum L.) Growth Parameters and biological control Mechanisms

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Advances in Microbiology 2016年第9期6卷 677-690页

作者： Benderradji Laid Kellou Kamel Ghadbane Mouloud Salmi Manel Saibi Walid Benmahammed Amar Bouzerzour Hamenna Brini Faiçal Faculty of Sciences Mohamed Boudiaf University M’sila Algeria Genetics Biochemistry and Plant Biotechnology Laboratory Constantine 1-University Constantine Algeria Faculty of Sciences FERHAT Abbes University Sétif Algeria Biotechnology and Plant Improvement Laboratory Centre of Biotechnology of Sfax/University of Sfax Sfax Tunisia

Three endemic plants rhizosphere (Astragalus gombo Coss. & Dur., Daucus sahariensis Murb., Ononis angustissima Lam.), were used for actinomycetes isolation. Ninety-three (93) isolates have been screened to evaluate their antagonistic properties against phytopathogenic microorganisms and to determine their biocontrol properties against Fusarium culmorum, especially responsible for several cereal diseases like font’s seedlings, rust, and burn of ears. Four (04) isolates (D2, D5, D8, and AST1) have been in vitro tested to determine PGPR effect and biocontrol characters of bread wheat (Triticum aestivum L.), Hidhab (HD) variety cultivated in the Murashigue and Skoog (MS) culture medium. The aim of this study is the evaluation of antagonistic isolates of pathogenic fungi F. culmorum, without and within commercial fungicide (Tebuconazole, 60 g/l) solution. Our results showed clearly that these isolates have a significant effect on seed germination and seedling growth. However, results argue that these actinomycetes isolates show a very interesting activity compared to the commercial fungicide. As a result, these bacteria isolates can be used as biocontrol agents against Fusarium wilt disease of wheat, which have a beneficial effect on growth parameters.

关键词： Bread Wheat biological control Endemic Plants Fusarium culmorum PGPR

controlling Dengue: Effectiveness of biological control and Vaccine in Reducing the Prevalence of Dengue Infection in Endemic Areas

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Health 2016年第1期8卷 64-74页

作者： Bryan Paul Wai Liang Tham Faculty of Science University of Alberta Edmonton Canada Faculty of Medicine University of British Columbia Vancouver Canada

With the increased prevalence of dengue infection in tropical countries, concerned members of the public are now pressing their local health ministries to act immediately and effectively in managing the rising numbers of reported cases. This includes reviews of the methodologies and the effectiveness of current combative systems to find other possible novel approaches that might yield better results. One of those novel approaches is the integration of a parasite into mosquito vector, manipulating the parasite-host interaction to reduce the transmission of dengue in endemic hotspots. Another alternative is by Sanofi-Pasteur’s dengue vaccine that showed over 60.8% success rate in reducing severe dengue infection in children aged 9 - 16 during its final clinical implementation phase. This report will compare and contrast these two novel ideas to determine which of the approaches are more likely to be effective in the long run. The aspects covered will include the application, effectiveness, functionality, and problems with these approaches. The results could then be utilised by governments or organizations to select precise and effective methods in reducing the prevalence of dengue infections in their countries.

关键词： Dengue Pathogenesis Pathology Immunology biological control Vaccine

Integrated biological control of Tobacco Bacterial Wilt (<i>Ralstonia solanacearum</i>) and Its Effect on Rhizosphere Microbial Community

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Journal of Biosciences and Medicines 2021年第3期9卷 124-142页

作者： Yun Hu Chunli Li Xiaoqiong Yang Ji Feng Lin Wang Shouwen Chen Yanyan Li Yong Yang State Key Laboratory of Biocatalysis and Enzyme Engineering School of Life Science Hubei University Wuhan China Tobacco Research Institute of Hubei Province Wuhan China Hubei Tobacco Industry Co. Ltd. Wuhan China

biological control agents and soil amendments have been applied to control tobacco bacterial wilt, but the mechanism is not well-known. In the present study, a field experiment was performed to investigate the soil physicochemical properties, disease index (DI) and disease incidence of tobacco bacterial wilt, and rhizosphere microbial community. The results show that the control efficacy of single application of antagonistic bacteria and calcium cyanamide was 46.43% and 51.92%, respectively. While the combined control efficacy of antagonistic bacteria and calcium cyanamide was 65.79%. Besides, the combined application of antagonistic bacteria and calcium cyanamide could increase soil pH, total N alkaline N, and exchangeable Ca, which were negatively associated with the microbial diversity, soil-borne pathogenic microorganisms, and incidence of tobacco bacterial wilt. Additionally, the combination of antagonistic bacteria and calcium cyanamide can improve the proportion of some antagonistic microbial species, and these antagonistic microbial species were inversely associated with the DI of tobacco bacterial wilt. In conclusion: The integrated measure may influence soil microbial communities through enhancing soil physicochemical properties and rebuild healthy soil microbial community structure to mitigate tobacco bacterial wilt. The current study presented valuable insights into the mechanisms enhancing soil health in the integrated measure.

关键词： biological control Tobacco Bacterial Wilt Alkaline Fertilizer Physicochemical Property Rhizospheric Microorganism

An Attenuated Strain of Cucumber Green Mottle Mosaic Virus as a biological control Agent against Pathogenic Viral Strains

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American Journal of Plant Sciences 2016年第5期7卷 724-732页

作者： Anna A. Slavokhotova Ekaterina A. Istomina Emma N. Andreeva Tatyana V. Korostyleva Vitalij A. Pukhalskij Alexander N. Shijan Tatyana I. Odintsova Vavilov Institute of General Genetics Russian Academy of Sciences Moscow Russia

Cucumber green mottle mosaic virus (CGMMV), a member of the Tobamovirus genus, causes a severe disease of cucurbits. In the Moscow region of Russian Federation, the incidence of infection on cucumber plants in greenhouses is high;however, the virus is poorly studied. In this work, the full-length genomes of two pathogenic MC-1 and MC-2 strains of CGMMV isolated from cucumber plants grown in greenhouses in the Moscow region and the attenuated VIROG-43M strain were sequenced. Comparison of VIROG-43M nucleotide sequence with those of the pathogenic strains revealed three missense mutations. Their role in attenuation is discussed. For the first time, in a number of trials conducted under laboratory conditions and in commercial greenhouses, the efficiency of the attenuated VIROG-43M strain as a biocontrol agent for cucumber plant protection resulting in significant yield gain was demonstrated. Phylogenetic analysis with 83 full-length CGMMV coat protein genes isolated in 16 different countries showed that Russian strains are related to isolates from Spain, Greece, USA and Israel.

关键词： Cucumber Green Mottle Mosaic Virus Tobamovirus Attenuated Virus Strain Cross-Protection biological control

Primary Study on biological control Potential of Trichoderma harzianum TL-1

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Plant Diseases and Pests 2014年第2期5卷 25-28页

作者： Su Zhenyu Xiao Man Gao Xinzheng Tang Libo Li Li College of Science Hainan Medical University

Trichoderma harzianum is a widely used biocontrol fungus. The growth promoting effect of strain Trichoderma harzianum TL-1 on tomato and pepper and its biological control effects against tomato seedling damping-off and pepper blight were investigated through pot experiments. The results showed that the stain TL-1 had significant promotion effect on growth of pepper and tomato in sterilized and natural soils. With the application dose of 3. 0 and 0. 5g/ pot,their dry weight were increased up to 46% and 150% compared with control,respectively. In addition,TL-1 had good control effects against tomato seedling damping-off and pepper blight. Compared with fungicide treatment,TL-1 treatment could control diseases for long term,without repeat occurrence of diseases.

关键词： Trichoderma harzianum TL-1 Growth promoting effect biological control