News, events, articles
New publication highlighted on front cover of Phytopathology
06 Jul 2006
A photograph from a new paper from Steve Roberts' old research team has been used to illustrate the front cover of the July 2006 issue of the journal Phytopathology. The paper by Joana Vicente, Barbara Everett and Steve Roberts [Phytopathology 96, 735-745] reports that the bacteria causing a leaf spot disease of brassicas should be correctly identified as Xanthomonas campestris pv raphani and not as pv armoraciae. The text is available on-line:
HDC Onion downy mildew and leaf wax project continuation
01 Apr 2006
HDC has agreed to fund a further one-year project to continue work begun in 2005 looking at the interactions of leaf wax levels and downy mildew (Peronospora destructor) infection. Onion leaves are covered with a layer of wax and this represents the first line of defence against attack by pathogens such as downy mildew. A test kit developed as part of the earlier project will be used to compare varieties and monitor wax levels in field trials. Project no. FV 277a.
1st International Symposium on biological control of bacterial diseases.
23-26 Oct 2005
Held in Darmstadt, Germany. A handout of the presentation on biological control of seed-borne bacterial diseases made by Steve Roberts is now available to download:
HDRA / Warwick-HRI Organic Day at Kirton.
28 Jul 2005
A handout of the presentation made by Steve Roberts and presentations by the other speakers are now available for download: Get handout...Â
New HDC project on onion, downy mildew and leaf wax
01 Jun 2005
A new HDC project led by Steve Roberts in association with VCS will look at the relationship between leaf wax and downy mildew (Peronospora destructor) in onions. Results of a previous project suggested that intensive spray programmes may not always give the expected levels of disease control, and this could be a result of de-waxing leading to increased disease susceptibility. Project No. FV 277.
5th ISTA-SHC Seed Health Symposium, Angers
10-13 May 2005
Handouts of posters by Steve Roberts on seed testing for bacterial blight of carrots and spread of Xanthomonas in brassica transplants are now available for download.
Use of green waste compost in organic horticultural systems. Chichester.
27 Jan 2005
Green waste compost can be highly effective at suppressing diseases, improving soil structure and reducing weeding costs, delegates at the HDRA event were told. On the other hand growers need assurance that they won't be introducing new diseaese into the system. Steve Roberts presented evidence that the risk is fairly low as long as composting is done according to the PAS100 standard, ensuring temperatures are high enough to kill most pathogens. A handout of the presentation is available for download.
New pathology/microbiology laboratory established at HDRA
30 Jul 2004
Refurbishment of laboratory facilities at HDRA has now been completed. Two of the rooms have been equiped for and dedicated to plant pathology and microbiology, with a preparation room and a secure 'clean room'.
01 Jul 2004
HDRA joins EC project on Seed Treatments for Organic Vegetable Production (STOVE) taking over the responsiblities, and safeguarding the work, previously assigned to HRI, prior to its take-over by the University of Warwick. With the current changes to the organic farming regulations with respect to the use of organic and non-organic seeds, the issue of seed health has become critical for some organic vegetable producers. The development of new techniques for seed sanitation and the control of seed-borne diseases is now more urgent than ever and is of interest to both producers and users of organic vegetable seeds.