Oilseed rape crops in Southern, Eastern and Midlands regions have been badly affected by cabbage stem flea beetle, with an estimated 10% of the planted area of winter oilseed rape lost over winter. A further 19% of crops are in poor or very poor condition. Where very poor crops remain in the ground, it is estimated that yields will be 20-40% lower than normal. However, in the North and West the condition of the crop is better with a higher proportion of crops considered to be in good to excellent condition.
Black grass remains the key weed of concern across the southern and Eastern parts of England. Where crops were competitive, herbicides for the most part gave moderate control, but with widespread issues of herbicide resistance, control was rarely complete. Overall, the disease pressure was low across all crops, with low rainfall and dry conditions reducing the risk of septoria spread in wheat and sclerotinia infection in oilseed rape.
Regional crop condition scores and growth stage data are available on the AHDB Crop Development report interactive dashboard.
The full Arable Crop Report for May 2019 is available for download here.
This crop development report has been prepared by ADAS using data provided by regional reporters from ADAS, NIAB TAG, SRUC and some independent agronomists.