The lack of an effective monitoring tool for capsids has been preventing effective control of these pests for years and has led to unnecessary use of pesticides.
Carnation tortrix moth and light brown moth are widespread pests of nursery stock causing damage to many species - Photinia, Chaenomoles, Daphne, Euonymus and Choisyia. They are both non-natives favoured by warm environments such as nursery stock grown under protection.
Even small numbers of adult flea beetles feeding on high-value speciality brassicas grown for salads can cause shot-holes in the leaves, which significantly reduces quality and thus marketability.
Reducing risk of infection - whether by indigenous or quarantine species like Phytophthora ramorum, depends on understanding the life cycle of Phytophthora and the weak points where the disease can enter and spread in trade and production systems.
Growers spend a lot of time and money each season trying to control canker (Nectria) but often find they have made little impact and so wasted the effort.
Damaging attacks of downy mildew on roses in nurseries can largely be prevented using a suitable spray programme of fungicides.
Incorporating composted onion waste into soil has given more effective control of Allium white rot (AWR) than a standard fungicide treatment in commercial trials pioneered at Warwick HRI over the past 10 years.
Ongoing HDC trials of herbicides to control problem weeds in container and field-grown nursery stock have yielded some helpful control tips for growers.
Dr Ken Cockshull, Emeritus Fellow at Warwick HRI, highlights the latest findings from horticultural research.
Dr Ken Cockshull, Emeritus Fellow at Warwick HRI, highlights the latest findings from horticultural research.
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