RAPID ACCESS TO THE LATEST REGIONAL CROP PEST AND DISEASE LEVELS 		HGCA logo
CropMonitor > Winter Wheat > National Surveys > 2005 GS71 aphid survey  


2004/2005 SURVEY: SUMMER APHID ASSESSMENT 2005
Unsprayed crops at growth stage 71(+)
 
Site Location Number of sites Grain aphid per head per site Rose-grain aphid per tiller per site
North 5 0.41 0.09
Midlands 11 0.53 0.11
East 10 3.52 1.91
Wales 2 0.68 0.09
South 12 1.10 0.33
mean of all 40 sites 1.44 0.62
 
Thresholds
Published thresholds are 5 per head for grain aphid and 5 per tiller for rose-grain aphid

Number of sites with more than 5 grain aphid per head:2 (5%)
Number of sites with more than 5 rose-grain aphid per tiller:1 (2.5%)

 
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This website was last updated on: 12/05/2008     © Crown Copyright Central Science Laboratory 2007
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All risk predictions published by CropMonitor are provided in good faith and are NOT a substitute for rigorous fieldwalking in combination with advice from BASIS qualified persons. CropMonitor accepts no liability for crop loss or damage resulting from the use of CropMonitor.