It used to be thought that day and night temperatures had separate effects on the growth and development of tomatoes and that they should therefore be controlled independently and within narrow ranges.
14 Jan 2011
| by HDC
The aim of HDC project FV 348 was to provide an independent assessment by the National Institute of Agricultural Botany of the yield, quality and storage potential of new onion varieties propagated from both seed and sets during 2009 and stored over the winter until May.
Growers might be able to use CO2 more effectively if they had better information about the carbon status of their crops. In the experiments reported here, beefsteak tomato plants were grown with CO2 enrichment in commercial glasshouses in British Columbia.
Samples of leaves were taken monthly from...
26 Nov 2010
| by HDC
Glasshouse lettuce is prone to colonisation by aphids, which can become established quickly. Visual detection can be difficult until the populations are already quite large.
Bitter pit in apples is caused by a lack of calcium in the fruit's outer tissues that ought to be easily overcome by spraying with solutions containing calcium. Unfortunately, the apple's surface often forms an impenetrable barrier to these solutions.
"Golden Reinders" trees in Spain were sprayed...
12 Nov 2010
| by HDC
Much of the knowledge used to optimise feeding and water management in strawberries grown in soil-less substrates has come from overseas experience and no scientific work has ever been conducted in the UK for the specific needs of UK growers.
Many growers would like to control plant diseases with "natural" materials and as copper salts occur naturally, there is interest in using them to control fungal diseases.
05 Nov 2010
| by HDC
Only a decade or so ago growers were spoilt for herbicides approved for use on strawberries.
Raspberries can be produced out of season by chilling canes so as to overcome their dormancy before they are forced into flower in a heated greenhouse.
22 Oct 2010
| by HDC
Recent research on cavity spot has completely changed our understanding of how the disease behaves in a carrot crop. It is now clear that Pythium violae does not behave like "classic" soil-borne diseases, where disease is directly proportional to initial inoculum levels.