Faculty of Agriculture, Meals and Rural Enterprise (CAFRE) agronomist Leigh McLean is advising the usage of stale seed beds to get on prime of grass weeds over the approaching weeks.
This chance is a direct consequence of this yr’s early cereal harvest.
“Mild cultivation after harvest encourages a flush of weeds which might be burnt off earlier than ploughing and drilling,” he defined.
“The place grass weeds are recognized to be an issue, delay drilling if circumstances permit and use excessive seed charges to assist the crop smother out undesirable grasses.
“If the grass weed burden is extreme and will impacts yields, growers ought to take into account spring cropping. This enables a number of alternatives to domesticate, chit and spray off weeds, thereby decreasing the weed seed financial institution.”
Weeds and illness
Turning to the problem of Barley Yellow Dwarf Virus (BYDV), McLean confirmed that earlier sown crops are the best threat of an infection.
Analysis has proven that an infection by migrating winged aphids is the commonest route for BYDV to develop into established in autumn cereals.
As a consequence, growers ought to take away the ‘inexperienced bridge’ for wingless aphids by burning off 7-10 days earlier than ploughing or ready 14 days between ploughing and sowing.
As autumn progresses aphid migration and consequent BYDV an infection, stress diminishes.
Nevertheless, growers ought to steadiness this profit in opposition to the truth that later sowing means slower emergence and probably poorer institution.
The CAFRE consultant additional defined: “Solely apply pyrethroid sprays when aphid colonies, not particular person aphids, are current on leaves, to sluggish improvement of pyrethroid resistance.
“A couple of winter barley varieties present tolerance to BYDV, that means if contaminated, undergo much less of a yield penalty in extreme outbreaks than non-tolerant varieties.
“Small portions of tolerant seed can be found this autumn so these needs to be thought-about for early sown, high-risk conditions,” he added.
Given the latest rains, slugs may pose an actual drawback in autumn-drilled cereal crops over the approaching weeks. Farmers ought to assess slug numbers earlier than crops are sown.
It’s a case of setting traps on damp soil utilizing dry bait below a tea tray sized cowl.
The traps needs to be left in a single day and checked for slugs the following day.
Based on McLean, eradicating inexperienced cowl reduces their habitat and feed supply.
If slug numbers exceed 4 per lure in cereals, or one per lure in oilseed rape, farmers ought to take into account making use of ferric phosphate-based pellets, if rising crops are nonetheless in danger.