Leave OSR stubbles untouched to overcome CSFB

Farmers are urged to delay destroying OSR stubbles to manage Cabbage Stem Flea Beetle risk
Farmers are urged to delay destroying OSR stubbles to manage Cabbage Stem Flea Beetle risk

Farmers are urged to leave oilseed rape stubbles untouched to try and overcome the devastating infestations of Cabbage Stem Flea Beetle on newly sown crops.

Since the loss of neonicotinoid seed treatments, farmers have seen increasing problems with Cabbage Stem Flea Beetle damaging.

Most crops currently being harvested are alive with the beetle and such numbers is concerning for those looking to establish next seasons rape over the next few weeks.

Robert Sullivan, of GSC Grays, is urging farmers to leave the oilseed rape stubble in the field as long as possible before drilling the wheat.



This will reduce the incidence of beetles moving onto newly sown oilseed rape, he says.

“The question now is how we deal with this? Farmers can spray insecticides however many are, understandably, reluctant to do so given the impact on the wider environment.



“In addition, many of these insecticides are not particularly effective, which means damage still occurs to the detriment of the crop,” Mr Sullivan says.

He says farmers should do everything they can to ensure the newly sown rape gets to 2-3 true leaves as soon as possible.

“Lack of moisture won’t be a problem this year, but slugs may well be, so be vigilant and act swiftly if there is evidence of slugs,” he adds.

“Choose a variety with good autumn vigour and look to apply a product like Di-ammonium phosphate to the crop at/around drilling.

“This will give the crop every chance to fight off an attack from Cabbage Stem Flea Beetle.”