Insect pests enjoy autumn warmth
With many crops now reaching over six weeks since sowing, the beneficial effects of insecticidal seed treatments are being stretched, warned Syngenta Field Technical Manager, Simon Roberts. “Whilst most farms are incredibly busy with establishing wheat, oilseed rape growers must still be vigilant for early signs of pest activity, and prepared to act quickly,” he advised.
Mr Roberts advocated control of Flea Beetle and stopping damage by most other insect pests would be best achieved with an application of fast-acting Hallmark Zeon. “That would also control most aphids, except where pyrethroid-resistant Myzus persicae are present. Where resistant Myzus are suspected, growers would have to switch to Plenum.”
Control of Myzus persicae is especially important, since it is the primary vector of Turnip Yellows Virus (TuYV) that can reduce oilseed rape yields by up to 30%. Early season virus infection is likely to lead to greater yield losses. Monitoring of aphid populations has revealed numbers of pyrethroid-resistant Myzus have increased significantly over recent months. Plenum effectively controls all aphid species, to minimise the spread of virus and stop further damage.
Most well grown oilseed rape crops should now avoid the worst of damage from Flea Beetle feeding activity. “However, any later emerging seedlings could still be hit, and the damage from the characteristic ‘shot-holing’ of leaves puts plants under additional stress that could make them more susceptible to other problems,” he advised.
“Establishing strong, compact plants with good root systems now, will give the potential to drive up oilseed rape yields in the spring.”
Mr Roberts added that autumn applications of either Hallmark Zeon or Plenum could be combined with control of volunteer cereals and grassweeds when using Fusilade Max, or with Plover treatments for Phoma and Light Leaf Spot.
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.
Butchers in the UK are losing a generation through lack of training opportu...
NASA research has revealed how dust blown from the Sahara desert helps supp...
“In the run up to the Budget 2015 most commentators were predicting that th...
The UK’s first fully operational floating solar panel system has been unvei...
Axing the badger cull in England and Wales will save more than £120 million...
By 2025, solar power could become one of the cheapest forms of energy in ma...
Demand for Scottish farm land remains strong and continues to be better val...
The Welsh red meat industry should aim to increase sales by at least 34 per...
Fears about the impact that a proposed transatlantic trade agreement could ...