Willow-carrot aphid forecasts 2022
The graph below shows the 鈥榙ay-degree forecast鈥� for willow-carrot aphid (Cavariella aegopodii). The forecast is based on accumulated day-degrees (D掳) from 1 February (base 4.4掳C). Information from the Rothamsted Suction trap captures have been used to estimate the mean number of D掳 from 1 February until the first aphid of the year is caught in a suction trap (the start of the migration to carrot) and when 10% of aphids are caught. This is after approximately 325 and 451D掳 respectively.
Forecast updated on 21st April 2022.
