22 August 1997

Powdery mildews spreading in beet

POWDERY mildew is spreading rapidly in sugar beet during the warm dry weather, warns IACR Brooms Barn.

Although a large area of the crop has now been sprayed, crops where the disease is appearing will still benefit from a sulphur spray, at least up until the end of August, it says.

With British Sugar predicting a C price of £15-£17/t, including transport allowance, and an average yield response of 5-7% in trials, economic benefits at the C price could be £38.60/ha for an outlay of about £10.n