Stewardship warns growers of increased leatherjacket threat
“Leatherjacket grubs are larger than usual for the time of year, so farmers need to be alert for any damage; particularly on establishing grass leys where they are following grass, but also to late drilled and spring cereal crops,” comments Brent Gibbon of Dow AgroSciences. “Hatched leatherjackets are vulnerable to desiccation, particularly when young, however the wet winter will have kept the soil moist and aided their survival.”
The stewardship initiative is urging growers to monitor fields known to have a history of leatherjacket damage, “Look out for large numbers of rooks and jackdaws feeding on the larvae,” notes Brent. “Cereals following established grass leys, a grassy stubble or spring barley are high risk crops. Permanent grassland and newly sown leys are also more likely to suffer yield damages from this pest, so growers need to be aware,” warns Brent.
“Chlorpyrifos is an effective insecticide, which following months of feeding by the pest can help prevent further damage, thus protecting the yield. It is vital that farmers firstly, have a strong knowledge of their land’s pest and disease history, and secondly look for indicators of leatherjackets in their crops, before treating.
“In recently planted crops, checking the top soil gives a good idea of pest activity; using a trowel, lift a few clods of soil working across the fields, a couple of inches deep to see if there are any grubs. Once the crops start germinating look for signs of damage around the base of the plant and the root. Be sure to treat at the first sign of activity,” advises Brent.
When applying chlorpyrifos for treatment of leatherjackets, growers should use LERAP rated 3 star nozzles and adopt a 20 metre no-spray buffer zone near to watercourses or a 1 metre near to dry ditches. “It is vital that growers adopt the stewardship guidelines when applying chlorpyrifos in order to help secure a future for this key insecticide,” concludes James.
No comments posted yet. Be the first to post a comment
Please enter your name
Please enter your comment
Your comment submitted successfully.Please wait for admin approval.
Some error on your process.Please try one more time.
The permanent eradication of Bovine Viral Diarrhoea [BVD] in Scottish cattl...
The abolition of milk quotas in Europe on 1st April has resulted in a numbe...
The top 14 milk producing countries in Europe will increase their productio...
Matt Ware is the NFU's head of government and parliamentary affairs, based ...
There is a 'desperate need' to improve farmgate returns given low incomes a...
Rapid stem extension, after a slow start to spring, is likely to create spl...
The time has come for landlords to expect to see reductions in farm rents, ...
Cogent’s reputation as a source of the highest calibre sires has been enhan...
The spread of exotic and aggressive strains of a plant fungus is presenting...