Aphid Trap Data
- The number of cereal aphids caught in Rokeby suction trap (blue square) between the 4th and 10th of May 2017 (May week 2) was 34 and is displayed in the graph below, along with:
- Other aphid numbers for 2017 (orange line)
- Average weekly temperatures for 2017 (purple line), calculated from mean daily temperatures from NIWA CliFlo data for Ashburton (Station no: 26170) and
- The 7 year average of weekly temperature between 2010 and 2016 (red line)
- Cereal aphid numbers for 2016 (green line)
- Cereal aphid numbers caught in suction traps are an indication of flights and do not replace the need for direct searching and monitoring in your crop.
- Relatively high numbers of aphids are expected till the end of May, with spring flights occurring late September or October
- Generally the warmer the temperature, the faster an aphid will develop into an adult. However other factors, such as amount of rain, can affect aphid development and survival.
Notes: The Rokeby Aphid Trap being operated for Dow AgroSciences is being monitored for any incursion of Russian Aphid.
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