Arable News

  • Written by: Farmers Guide
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Early aphid activity forecast following relatively warm winter

Cerealand oilseed rape aphids are likely to fly considerably earlier this year,according to HGCAs Aphid News service.

 

Theservice, provided in association with Rothamsted Research, uses data from anational suction trap network and long-term weather data to forecast the startof aphid flights and aphid abundance in spring and early summer.

 

Theforecasts include dates when cereal and brassica aphids are expected to befirst caught in thirteen suction traps.

 

MissCaroline Nicholls, HGCA Research and Knowledge Transfer Manager, said: Averagetemperatures in January and February can be used to forecast the first aphidflights.

 

Thetemperature in January and February was considerably higher than the long-termaverage across the country by 1C to 1.5C in the north andaround 2C in the south and it is estimated the first aphid flights will betwo to four weeks earlier than average.

 

Theforecasts show that the suction trap, located in the South West, could capturethe first cereal aphids any day now, stated Miss Nicholls.

 

TheRothamsted suction trap, located in Hertfordshire, has been capturing brassicaaphids since its first year of operation 50 years ago in 1964. At this site,peachpotato aphid (Myzus persicae) is predicted to be captured on 15April this year the 8th earliest forecast date out of the 50years.

 

Theforecast data reveals the potential progression of aphid flights across the UKand the suction trap located at Dundee is not predicted to catch the firstpeachpotato aphid until 1 June.

 

Fromearly April, HGCA plans to issue weekly Aphid News bulletins so growers cankeep abreast of the latest regional aphid developments, including informationon virus transmission and potential resistance issues.

 

Toview the forecasts for 2014 (which include regional analysis) or to subscribeto the weekly Aphid News service, visit www.hgca.com/pests

 


  • Written by: Farmers Guide
  • Posted:
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