22 March 1996

Leatherjacket risk to grass

pasture is at risk from leatherjacket damage this spring, according to DowElanco. It predicts that one in six fields will be vulnerable if step are not taken to control the pest.

The companys Pestwatch service pinpoints Cheshire as one of the hot spots for pest activity. Here 25% of established grassland is above the threshold for yield loss.

"On a national level, 16% of established grassland has populations exceeding one million leatherjackets a hectare," says DowElancos James Knight. "The after-effects of the drought mean that pest impact will be greater in fields where populations exceed this threshold for damage."

He stresses that measures must be taken to control leatherjacket populations in established grass. &#42