A5061386552- Plant Virus Research Studies
- Insect-Plant Interactions and Control
- Plant and Fungal Interactions Research
- Plant Pathogenic Bacteria Studies
- Forest Insect Ecology and Management
- Nematode management and characterization studies
- Plant Pathogens and Fungal Diseases
- Cassava research and cyanide
- Plant Disease Resistance and Genetics
- Agricultural pest management studies
- Plant Pathogens and Resistance
- Phytoplasmas and Hemiptera pathogens
- Research on scale insects
- Cocoa and Sweet Potato Agronomy
- Entomopathogenic Microorganisms in Pest Control
- Plant-Microbe Interactions and Immunity
- Yeasts and Rust Fungi Studies
- Mosquito-borne diseases and control
- Insect Resistance and Genetics
- Legume Nitrogen Fixing Symbiosis
- Animal Virus Infections Studies
- Insect Pest Control Strategies
- Agronomic Practices and Intercropping Systems
- Insect and Pesticide Research
- Plant Disease Management Techniques
Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures
2016-2025
Leibniz Association
2012-2023
Université Catholique de Bukavu
2019
ICAR - Central Island Agricultural Research Institute
2018
Government of Himachal Pradesh
2018
Michigan State University
2017
Institute for Biodiversity
2017
World Health Organization - Egypt
2017
Digital Europe
2017
Verlab (Bosnia and Herzegovina)
2017
EFSA JournalVolume 16, Issue 8 e05350 GuidanceOpen Access Guidance on quantitative pest risk assessment Panel Plant Health (PLH), Search for more papers by this authorMichael Jeger, authorClaude Bragard, authorDavid Caffier, authorThierry Candresse, authorElisavet Chatzivassiliou, authorKatharina Dehnen-Schmutz, authorJean-Claude Grégoire, authorJosep Anton Jaques Miret, authorAlan MacLeod, authorMaria Navajas Navarro, authorBjörn Niere, authorStephen Parnell, authorRoel Potting, authorTrond...
Cassava brown streak virus (CBSV) isolates were analysed from symptomatic cassava collected between 1997 and 2008 in the major cultivation regions of East Africa. An analysis complete RNA genomes seven Kenya, Tanzania, Mozambique, Uganda Malawi revealed a common genome structure, but clearly clustered two distinct clades. The first comprised Uganda, Malawi, north-western Tanzania CBSV described previously, shared 87 95% nucleotide sequence identity, whilst second included coastal Mozambique...
ABSTRACT The whitefly Bemisia tabaci (Gennadius) is a major cosmopolitan pest capable of feeding on hundreds plant species and transmits several viruses. most important widespread viruses vectored by B. are in the genus Begomovirus , an unusual group owing to their small, single-stranded DNA genome geminate particle morphology. begomoviruses persistent circulative nonpropagative manner. Evidence suggests that vector encounters deleterious effects following Tomato yellow leaf curl virus...
In July 2018, unusual fruit and leaf symptoms were observed in numerous greenhouses cultivating tomatoes commercially the Lower Rhine region of North-Rhine Westphalia, Germany. Foliar included chlorosis, mosaic with dark green bulges narrowing (Fig.1). Fruit consisted yellow spots, often concentrated around calyx (Fig. 2) occasional rugose rendering fruits non-marketable 3). total, more than 25 ha greenhouse affected. Initial investigation by electron microscopy showed presence filamentous...
The importance of cassava as a food security crop in Africa and the world Cassava, originally from South America, is fourth most important source calories developing after cereal crops wheat, maize, rice.Worldwide, it feeds an estimated 700 million people directly or indirectly.Cassava production has increased steadily for last 50 years, with 242 MT harvested 2012.The increase likely to continue farmers more than 105 countries come recognize crop's advantages.A semi-perennial root crop, can...
Abstract We here assessed the capability of MinION sequencing approach to detect and characterize viruses infecting a water yam plant. This platform consistently revealed presence several plant virus species, including Dioscorea bacilliform , Yam mild mosaic chlorotic necrosis . A potentially novel ampelovirus was also detected by complimentary Illumina approach. The full-length genome sequence determined using Sanger sequencing, which enabled determination coverage accuracy technology....
Following a request from the European Commission, EFSA Plant Health Panel updated its pest categorisation of Xylella fastidiosa, previously delivered as part risk assessment published in 2015. X. fastidiosa is Gram-negative bacterium, responsible for various plant diseases, including Pierce's disease, phony peach citrus variegated chlorosis, olive quick decline syndrome, almond leaf scorch and other diseases. The pathogen endemic Americas present Iran. In EU, it reported southern Apulia...
The European Commission requested EFSA to conduct a pest categorisation of Spodoptera frugiperda (Lepidoptera: Noctuidae) with hosts in 27 plant families. Favoured include maize, rice and sorghum (Poaceae). Hosts also crops within the Brassicaceae, Cucurbitaceae, Solanaceae, Rutaceae other S. is taxonomic entity reliable methods for identification. It regulated EU as harmful organism whose introduction into banned. native tropical subtropical regions Americas migrates temperate North South...
Mungbean (Vigna radiata (L.) Wilczek) is an important pulse crop in India. A major constraint for improved productivity the yield loss caused by mungbean yellow mosaic disease (MYMD). This several begomoviruses which are transmitted whitefly Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae). The objective of this study was to identify predominant infecting and cryptic species B. associated with indigenous Asia II 1 found dominant Northern India, whereas 8 Southern Repeated samplings over...
The whitefly Bemisia tabaci (Gennadius) is one of the most threatening pests to crop production in tropical and subtropical regions. Severe damage results from its effective transmission plant viruses; serious are members genus Begomovirus. B. a complex at least 34, species with Middle East-Asia Minor 1 (MEAM1) Mediterranean being aggressive due their broad host range enhanced resistance pesticides. Because invasion these into new areas often linked severe outbreaks virus diseases,...
Cassava brown streak disease (CBSD) is a severe virus of cassava and prevalent in the eastern regions Africa. The characterized by distinct vein chlorosis symptoms on leaves stems necrosis storage roots. This can encompass large areas root, rendering it inedible so that entire harvest be lost. African varieties are susceptible to either two viruses causing disease, (CBSV) Uganda virus, while there less sensitive varieties, all eventually succumb disease. lack CBSD resistance prompted this...
Growing cassava in Africa requires resistance against the viruses causing mosaic disease (CMD) and brown streak (CBSD). A dominant CMD2 gene from a West African landrace provides strong viruses. However, is limited to varieties that show tolerance disease. recently identified germplasm cannot be infected with new source of required protect CBSD. We present synopsis status virus report on research combine CBSD CMD. improve lengthy erratic screening for by proposing infection protocol CMD,...
Bemisia tabaci (Gennadius) populations, collected from cassava and other plants in major cassava-cultivation areas of Sub-saharan Africa elsewhere around the world, were studied to determine their biotype status genetic variation. Random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR) markers used examine structure populations. The dendogram obtained using neighbour joining method (NJ) split cassava-associated populations non-cassava types with a 100% bootstrap probability....
Four forms of Colletotrichum representing three distinct virulence phenotypes were found associated with foliar anthracnose yam in Nigeria: the highly virulent (= severity disease) slow‐growing grey (SGG); moderately fast‐growing salmon (FGS); weakly (FGG); and olive (FGO) morphotype. Isolates four identified as C. gloeosporioides , based on morphology. The reaction monoconidial cultures casein hydrolysis medium (CHM), PCR‐RFLP sequence analysis internal transcribed spacer region ribosomal...
Damage to agricultural crops by tospoviruses has occurred sporadically in Iran the past; however, since 2000, outbreaks of have been recorded every year. The most affected ornamental were surveyed two main cultivation areas provinces Markazi (Mahallat) and Tehran 2000-01 2001-02. A few weed species also collected. In all, 513 samples (with or without any conspicuous virus symptoms) collected analyzed double- triple-antibody sandwich enzyme-linked immunosorbent assay (ELISA) with polyclonal...
Bemisia tabaci is a serious pest of agricultural and horticultural crops in greenhouses fields around the world. This paper deals with distribution under field conditions. In Europe, insect currently found coastal regions Mediterranean countries where it subject to quarantine regulations. To assess risk presented by B. area potential establishment this insect, light climate change scenario, was assessed temperature-dependent physiologically based demographic model (PBDM).The simulated...
Three field experiments were conducted to assess the effect of planting date on incidence viral diseases and severity susceptibility cultivars. Two cultivars cucumber (Hybrid Tokyo F1 Poinsett) one local variety zucchini (Bolle) used for evaluation in May-July 2014, September-November February-April 2015. A randomized complete block design with three replications was experiments. Data collected disease incidence, severity, time until first symptoms occurred. Area under index progress curve...
Two-component plant defenses such as cyanogenic glucosides are produced by many species, but phloem-feeding herbivores have long been thought not to activate these due their mode of feeding, which causes only minimal tissue damage. Here, however, we report that glycoside from cassava (Manihot esculenta), a major staple crop in Africa, activated during feeding pest insect, the whitefly Bemisia tabaci, and resulting hydrogen cyanide is detoxified conversion beta-cyanoalanine. Additionally, B....
Flexuous, filamentous, viruslike particles with a modal length of 950 nm were consistently observed in leaf dip preparations Ipomoea setosa infected the whitefly-transmitted component sweet potato virus disease (SPVD) from Nigeria. Ultrastructural examinations tissue I. revealed membrane-enclosed vesicles containing fibrillar material phloem parenchyma, which are indicative clos- terovirus infections. These structures also present thin sections prepared SPVD-infected (...)