Research Matters - Prolonging activity of pyrethroids
08 Apr 2011 | by Dr Ken Cockshull
Pyrethrum is an effective insecticide with low toxicity to humans, but it is rapidly destroyed by ultraviolet light.
Columnea latent viroid (CLVd) is one of nine viroids known to affect tomatoes.
Pyrethrum is an effective insecticide with low toxicity to humans, but it is rapidly destroyed by ultraviolet light.
Tuta absoluta, an increasingly important pest of tomato crops in southern Europe, is extremely damaging and currently controlled by intensive chemical pesticide applications. But such products would not be compatible with biological control agents.
Powdery mildew is a significant apple disease and extremely costly for growers to contain through pruning and routine fungicide application. Potassium bicarbonate has been used as a powdery mildew eradicant on many other crops with huge success.
This study for outdoor lettuce evaluated downy mildew fungicides.
Baby leaf crucifer crops, such as rocket grown at high densities, are particularly susceptible to downy mildew from emergence, especially the cotyledons and first true leaves.
Significant damage to watercress and baby leaf Brassica crops occurred in 2006 caused by turnip sawfly (TSF).
Over the past five years, the previously successful prophylactic bio-control strategy for whitefly in tomato crops of weekly releases of parasitic wasp Encarsia formosa seems to be failing.
As the use of methyl bromide -- the soil sterilant of choice for years -- has been phased out in the EU, it has become imperative to find efficient, cost-effective ways of disinfesting soils.
Summer-fruiting raspberries contain both floricanes (fruiting) and primocanes (spawn).



Latest Tenders
Contract for the Supply of Horticultural Machinery & Equipment
Sunderland City Council
CONTRACTS FOR THE SUPPLY OF PARKS
MAINTENANCE AND TREES MAINTENANCE
Wandsworth Borough Council
NEWS: Industry bodies turn attention to longer term water strategy
CHELSEA 2012: A full round-up
GROWER PROFILE: Investment fuels success for Lincolnshire Field Products
RETAIL: Water-wise retail sales
MARKET REPORT: Crop quality drives latest polytunnels
ARB SHOW 2012: A preview
BUSINESS PLANNING: Why advertising pays