BYDV Risk in Spring Cereals
BYDV risk could be high for spring crops in areas that had early sown winter cereals and particuarly those that did not receive foliar insecticides. Alongside a mild autumn/winter, aphids caught in Syngenta water traps have had a BYDV incidence of 40% consisting mostly of the more serious strains. This in combination with the possibility of later planted crops due to the high workload this season and more volatile springs becoming more common, puts this season at risk of having susceptible crops as levels of aphid pressure grow. As such growers need to be vigilant especially when initial invasion occurs in <GS31 crops when foliar insecticides should be applied.
Growers should remember however, that Apps predicting secondary spread (BYDV Assist) are not applicable at this time of year, as primary infection is the main proponent of infection and yield loss.
Late sown spring cereal crops are most at risk of BYDV infection and need close monitoring this season as aphid flights haven’t been significantly perturbed by the cold wet weather.