Djamila Hannah Djeddour

• Master of Science
• Project Manager at Centre for Agricultural Bioscience International

Background In Kenya, rice (Oryza sativa L.) is mainly produced under irrigation by small‐scale farmers. Mwea irrigation scheme (MIS) in Kirinyaga County accounts for 80–88% of rice production. Here, rice is the main source of livelihood and a source of revenue generation for the county. However, a recently established invasive freshwater snail, Pom...

Estimates of the economic impact of invasive non-native species (INNS) are important to support informed decision-making and prioritise resources. A detailed estimate of the direct costs of INNS to Great Britain, covering many sectors of the economy and the impacts of many INNS in diverse habitats, was made in 2010 and extended to Northern Ireland...

This datasheet on Hedychium gardnerianum covers Identity, Overview, Distribution, Dispersal, Hosts/Species Affected, Diagnosis, Biology & Ecology, Environmental Requirements, Natural Enemies, Impacts, Uses, Prevention/Control, Further Information.

This datasheet on Hedychium flavescens covers Identity, Overview, Distribution, Dispersal, Hosts/Species Affected, Diagnosis, Biology & Ecology, Environmental Requirements, Natural Enemies, Impacts, Uses, Further Information.

This datasheet on Hydrocotyle ranunculoides covers Identity, Overview, Distribution, Dispersal, Diagnosis, Biology & Ecology, Natural Enemies, Impacts, Uses, Prevention/Control, Further Information.

This datasheet on Hedychium coccineum covers Identity, Overview, Distribution, Dispersal, Hosts/Species Affected, Diagnosis, Biology & Ecology, Environmental Requirements, Natural Enemies, Impacts, Uses, Prevention/Control, Further Information.

Hedychium coronarium (Zingiberales: Zingiberaceae), native to the Himalayas and southern China, has become an environmental weed in many countries around the world. Reported in several provinces of Argentina, H. coronarium constitutes a serious environmental problem especially in the wetlands of natural areas of Misiones Province, such as the Iguaz...

Huanglongbing (HLB), also known as citrus greening disease, is one of the most devastating pathogens of citrus worldwide and is caused by closely-related species of systemic Candidatus bacteria. Vectored by the Asian citrus psyllid (ACP), Diaphorina citri, the heat-tolerant, Asian form of the disease, Candidatus Liberibacter asiaticus (CLas) is the...

The South American freshwater apple snail, Pomacea canaliculata (Lamarck) has been introduced and become invasive in many parts of the world, causing significant economic losses in wetland rice cultivation, threatening biodiversity and impacting on human health. The confirmed report in 2020 of this snail species damaging rice crops in Mwea, the mos...

Following reports of an invasive snail causing crop damage in the expansive Mwea irrigation scheme in Kenya, samples of snails and associated egg masses were collected and sent to CABI laboratories in the UK for molecular identification. DNA barcoding analyses using the cytochrome oxidase subunit I gene gave preliminary identification of the snails...

Following reports of an invasive snail causing crop damage in the expansive Mwea irrigation scheme in Kenya, samples of snails and associated egg masses were collected and sent to CABI laboratories in the UK for molecular identification. DNA barcoding analyses using the cytochrome oxidase subunit I gene confirmed the identity of the snails as Pomac...

The Convention on Biological Diversity and the Nagoya Protocol establish that genetic resources shall be accessed only upon the existence of prior informed consent of the country that provides those resources and that benefits arising from their utilization shall be shared. Pursuant to both agreements several countries have adopted regulations on a...

During surveys for the potential biocontrol agents Merochlorops species complex (Diptera: Chloropidae), to control the invasive weed Hedychium gardnerianum Sheppard ex Ker Gawl. (Zingiberaceae), two new species of Rhogadopsis Brèthes (Braconidae: Opiinae) viz., R. gratia Gupta & van Achterberg, sp. n. and R. macrusa Gupta & van Achterberg, sp. n. w...

The Nagoya Protocol is a supplementary agreement to the Convention on Biological Diversity (CBD) with the aim to provide a legal framework for the Access to Genetic Resources and the Fair and Equitable Sharing of Benefits Arising from their Utilization (ABS). The Protocol is impacting our work when searching for, collecting and studying natural ene...

Fallopia japonica, commonly known as Japanese knotweed, is an increasingly serious invasive alien weed in the UK and large parts of mainland Europe, as well as in North America. There is an urgent need to include classical biological control (CBC) into any integrated pest management strategy. The leaf-spot pathogen Mycosphaerella polygoni-cuspidati...

International collaboration facilitates research into the natural control of two highly invasive plant species Djeddour*, D., Tanner*, R.A., Ballal, Chandish R. ** *CABI, Bakeham Lane, Egham Surrey, TW20 9TY **ICAR-NBAII, Post Bag No:2491, H.A. Farm Post, Bellary Road, Bangalore - 560 024. Karnataka, INDIA. Email: d.djeddour@cabi.org ballalchand...

Clearly defining the taxonomic identity of a potential biocontrol agent is an essential component of any biological control programme. As part of such a programme against Impatiens glandulifera, a highly invasive annual weed in both Europe and North America, the rust fungus Puccinia komarovii was collected on this host plant in its native Himalayan...

Fallopia japonica（Japanese knotweed, Polygonaceae）, native to Japan, has been a serious invasive perennial weed in North America and large parts of Europe, especially in the UK, where there is an urgent need for a classical biological control strategy. Surveys have confirmed the presence of specialized plant pathogens in the native range of Japan....

Hydrocotyle ranunculoides is a perennial macrophyte that forms dense interwoven mats on stagnant or slow moving waters. It is native to the Americas, but has become invasive in many countries. Its rapid and thick growth can block watercourses interfering with their economic and ecological functions. The ecology of H. ranunculoides and of some of it...

The ecological and economic impacts of invasive species are significant and diverse in nature. Globalisation has led to increased introduction and establishment rates of invasive species in Europe, a trend which is likely to continue. The management of invasive weeds in Europe currently relies on chemical and manual methods which can be costly and...

Shaw RH, Tanner R, Djeddour D & Cortat G (2011). Classical biological control of Fallopia japonica in the United Kingdom – lessons for Europe. Weed Research51, 552–558. The programme for the biological control of Fallopia japonica in the United Kingdom has provided some valuable insights into the practicalities of delivering a classical biological...

Japanese knotweed, Fallopia japonica var. japonica (Polygonaceae) is one of the most pernicious invasive weeds in Europe. A vigorous, herbaceous perennial, it was introduced from Japan to the nursery of Philipp von Siebold in the Netherlands in 1849 and was subsequently made widely available to the European public, soon becoming a much-prized ornam...

Native to Japan, Fallopia japonica, most frequently referred to as Japanese knotweed, is a highly problematic invasive weed, particularly in the UK and North America. During surveys for natural enemies of this plant in Japan, two species of Mycosphaerella were collected. One of these was identified as M. polygoni-cuspidati, and is redescribed and n...

Japanese knotweed, Fallopia japonica is an invasive alien weed causing serious environmental and economical problems in Europe and North America. During field surveys in Japan, a rust fungus was observed in summer/autumn causing severe damage to the weed. This rust pathogen was identified as Puccinia polygoni–amphibii var. tovariae based on morphol...

Fallopia japonica, commonly known as Japanese knotweed or “itadori”, is an increasingly invasive and troublesome weed in Europe and North America. Classical biological control is being assessed as a potential management strategy in the UK. During surveys in its native Japan, a distinctive rust fungus which commonly appeared in spring was recorded....

Native to Japan, Fallopia japonica, most frequently referred to as Japanese knotweed, is a highly problematic invasive weed, particularly in the UK and North America. During surveys for natural enemies of this plant in Japan, two species of Mycosphaerella were collected. One of these was identified as M. polygoni-cuspidati, and is redescribed and n...

The neotropical rust fungus, Puccinia spegazzinii, was released in India in 2005 for the classical biological control of the invasive alien weed, Mikania micrantha. This paper contains data from the pest risk assessment that was undertaken prior to release. It includes studies on the life-cycle, pathotype variation, infection parameters and host-sp...

These proceedings contain the full-length papers and abstracts of papers presented at the symposium. Subjects covered include: ecology and modelling in biological control of weeds; benefits, risks and cost analysis of biological weed control; target and biological control agent selection; pre-release specificity and efficacy testing; regulations an...

The effects of faecal drug residues following the administration of anthelmintics in the form of sustained-release boluses, on dung-colonising Coleoptera and Diptera are reported. In blind field trials, pats of standard weight and size were prepared from the dung of cattle treated with an ivermectin (Ivomec SR Bolus, MSD Agvet) or a fenbendazole (P...

Japanese knotweed, Fallopia japonica (Houtt.) Ronse Decr., (Polygonaceae), is a serious environ-mental and economic weed in its adventive range of Europe and much of North America. Such is the scale of the problem in the UK that a pioneering biocontrol programme began in 2003 which would possibly make it the first target of a full classical biologi...