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bactericera cockerelli(Sulc), a potential threat to China’s potato industry

Journal of Integrative Agriculture 2020年第2期19卷 338-349页

作者： Oluwashola OLANIYAN Neus RODRÍGUEZ-GASOL Nathalie CAYLA Eleonor MICHAUD Steve D.WRATTEN Bio-Protection Research Centre Lincoln UniversityLincoln 7647New Zealand Institute for Research and Technology in Food and Agriculture(IRTA) Lleida 25003Spain Agrocampus Ouest Institut National Supérieur des Sciences AgronomiquesAgroalimentairesHorticoles et du PaysageRennes Cedex 35000France

The potato psyllid bactericera cockerelli(Hemiptera:Triozidae)has recently emerged as a serious pest of potatoes and other solanaceous crops.It causes direct feeding damage and also vectors Candidatus Liberibacter solanaceaerum(Lso),a pathogen that causes zebra chip disease in potatoes and which potentially costs growers millions of dollars each year.Such producers rely on frequent sprays of pesticides for psyllid control but the results are unsatisfactory and there are negative side effects.The psyllid has spread beyond its native range in southwest US and northern Mexico to Canada,El Salvador,Honduras,Guatemala and Nicaragua via medium to long range dispersal flights perhaps aided by wind currents,and through anthropogenic means.It was accidentally introduced into New Zealand in 2006 and most recently Australia,most likely through the importation of infested plant material.This review summarizes information from studies on the biology,impact and management of B.cockerelli,and highlights the imminent risk of this insect and its associated pathogen invading China,the world’s largest producer of fresh potatoes.Development of risk maps leading to increased surveillance,could prevent or delay an incursion and facilitate early detection or eradication should this occur.Long-term management with Lso-tolerant potato cultivars and psyllid control using the parasitic wasp Tamarixia triozae and other natural enemies should be pursued,rather than depending on synthetic pesticides.

关键词： bactericera cockerelli tomato-potato psyllid invasive pest Candidatus Liberibacter solanaceaerum biological control Tamarixia triozae

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Deleterious effects of electron beam irradiation on development and reproduction of tomato/potato psyllids, bactericera cockerelli

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Insect Science 2020年第6期27卷 1311-1321页

作者： Jiaxin Lei Jia Meng Ivy WChen Weining Cheng Andrea L.Beam Md-Sajedul Islam Woodward D.Bailey Suresh Pillai Keyan Zhu-Salzman Department of Entomology Texas A&M UniversityCollege StationTXUSA Institute for Plant Genomics&Biotechnology Texas A&M UniversityCollege StationTXUSA Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau Ministry of AgricultureNorthwest A&F UniversityYanglingShaanxiChina USDA-APHIS-PPQ-S&T-CPHST MiamiFLUSA National Center for Electron Beam Research Texas A&M UniversityCollege StationTXUSA

The potato/tomato psyllid bactericera cockerelli causes serious damage to several solanaceous crops by direct feeding and vectoring Candidatus Liberibacter solanacearum,a bacterial pathogen.Electron beam(eBeam)irradiation is an environmentally friendly,chemical-free alternative method that is increasing in use for disinfestation of insect pests.We hypothesize that this irradiation technology will have detrimental effects on potato psyllid and thus impede its disease vectoring.To this end,we explored the effects of eBeam treatment ranging from 50 to 500 Gy on survival,development and reproduction of this pest.Impact on psyllids was apparently dose-dependent.When irradiated at 350 Gy,eggs could not hatch,1st instar nymphs failed to emerge,and although a small portion of irradiated 5th instar nymphs survived,the emerged adults were mostly deformed.Abnormality in eclosed adults suggests harmful effects of eBeam on metamorphosis.Reproduction was seriously impaired when female psyllids were exposed to eBeam at the 5th instar nymphal or young adult stage,presumably due to inability to form oocytes.In addition,reciprocal crosses between irradiated and untreated psyllids indicated that female psyllids were more radiosensitive than males to eBeam.Taken together,these findings indicate that eBeam negatively impacted potato psyllid development and reproduction,which would inevitably compromise its disease transmission capacity.A dose of 350 Gy can be considered as a reference dose for effective control of potato psyllids.

关键词： bactericera cockerelli development electron beam(eBeam) irradiation reproductive system

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Ecology and management of bactericera cockerelli and Candidatus Liberibacter solanacearum in New Zealand

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Journal of Integrative Agriculture 2020年第2期19卷 333-337页

作者： Jessica VEREIJSSEN Applied Entomology the New Zealand Institute for Plant and Food Research Limited

The psyllid bactericera cockerelli was first reported in New Zealand in 2006 and spread quickly throughout all potato growing regions.In 2009,B.cockerelli was associated with the plant pathogenic bacterium Candidatus Liberibacter solanacearum,the putative causal agent of zebra chip disease in potato.Both the psyllid and the bacterium have non-crop host plants which can serve as reservoirs when the crop is not available.Growers apply different management strategies that fit integrated pest management programmes to manage B.cockerelli and subsequently lower incidence of zebra chip disease in potato crops.Despite best management efforts,complete control of B.cockerelli and zero incidence of zebra chip disease are not achievable at the current time.

关键词： bactericera cockerelli Candidatus Liberibacter solanacearum potato insect vector

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Impact of potato psyllid （Hemiptera： Triozidae） feeding on free amino acid composition in potato

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Insect Science 2011年第6期18卷 663-670页

作者： Xiang-Bing Yang Nasir S. A. Malik Jose L. Perez Tong-Xian Liu Key laboratory of Applied Entomology Northwest A＆F University Yangling Shaanxi China Vegetable IPM Laboratory Texas AgriLife Research Texas A＆M System Kika de la Garza Subtropical Agricultural Research Center USDA-ARS Weslaco Texas USA

The impacts of potato psyllid （bactericera cockerelli） feeding on potato foliage on the free amino acids （FAAs） composition in potato leaf and tubers were determined under greenhouse conditions. The free amino acids in plant extracts were separated by high-performance liquid chromatography, and in both leaf and tuber samples, at least 17 FAAs were detected. Psyllid feeding significantly changed the levels of several FAAs in both leaf and tuber samples. The concentration of leucine increased 1.5-fold, whereas that of serine and proline increased 2- and 3-fold, respectively. In contrast, the concentrations ofglutamic acid, aspartic acid and lyscine were significantly reduced by 42.0%, 52.1% and 27.5%, respectively. There were also significant changes in the levels of FAAs in the Zebra chip （ZC） infected tubers compared with the healthy tubers, and the levels of six of the FAAs increased, and the levels of nine of the FAAs decreased. The results from this study indicate that potato psyllid causes major changes in free amino acid composition of plant tissues, and this change in plant metabolism may contribute to the plant stress as indicated by increased levels of proline in the leaves and hence promoting the development of plant diseases such as ZC disease.

关键词： bactericera cockerelli free amino acids HPLC potato stress Zebra chip

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