Farming
Super pest survives winters
A ‘SUPER PEST’ moth resistant to a class of common plant protection is now also capable of surviving through the UK’s cold winter conditions, according to new research.
Diamondback moths have arrived in their tens of millions in the past few days with more expected. Crop experts have warned the animals could have a devastating effect on cabbages and other vegetables
Diamondback moth (DBM) caterpillars feed on crops including cabbage, broccoli, swedes and Brussels sprouts, causing cosmetic damage, which could result in the loss of up to 100% of the crop. Brassicas were worth more than £200m to UK agriculture last year.
The pests, which have developed resistance to the pyrethroid class of plant protection products often have reduced fitness levels so don’t survive through winter. However, experts from Rothamsted Research and AHDB are concerned because this is not the case with this new strain of moth.
Growers are being asked to submit samples of the DBM either when seen through winter, or in spring when numbers start to rise, to aid the continued monitoring and development of control strategies to manage the pest.
Dr Dawn Teverson, Knowledge Exchange Manager at AHDB, said: “This new research reconfirms what we found last year. It’s important that Brassica growers are aware of this pyrethroid resistance and plan their crop protection programmes to treat against diamondback moths, accordingly.
“If pyrethroids are used, not only does this now fail to control DBM but it could also kill beneficial insect predators which would naturally help control the pest, further exacerbating the problem.”
Pyrethroid resistant DBM have been found overwintering on swede crops grown under insect netting.
Dr Steve Foster, research entomologist at Rothamsted Research, said: “We have seen in aphids that those which have developed resistance may not survive the winter, however this doesn’t seem to be the case with this new strain of DMB.
“The identification of pyrethroid resistance in this season’s population of moths suggests that they are descendants of 2016’s migrating diamondbacks and therefore that the resistance hasn’t stopped them from surviving over winter.”
Andrew Rutherford, farm and agronomy manager at K. S. Coles, said: “This study has been extremely helpful to growers, allowing them to increase their understanding of the pests they are trying to control and which actives will be effective.”
The diamondback moth is often described as a ‘super-pest’ because it has a rapid lifecycle, providing more opportunities for resistance to develop through gene mutation. In 2016, Steve Foster at Rothamsted Research tested three diamondback moth samples for resistance from Lincolnshire, Suffolk and Scotland. All three samples were resistant to pyrethroids.
AHDB’s co-funded project ‘FV 344a Monitoring and Managing Insecticide Resistance in UK Pests’ is currently due to end in March 2018. For further information about diamondback moth and control options, visit horticulture.ahdb.org.uk/diamondback-moth or contact [email protected] for more details.
Farming
‘Poor decision’ New Creamston housing condition overturned
A “POOR DECISION” agricultural worker-only imposed nearly 40 years ago has been removed from a Pembrokeshire property by county planners.
In an application recommended to be approved at the December meeting of Pembrokeshire County council’s planning committee, Tim and Cathy Arthur sought permission for the removal of an agricultural worker-only condition at New Creamson, Creamston Road, near Haverfordwest.
An officer report for members said the agricultural condition was imposed when the dwelling was built in 1988/89, with a later certificate of lawful development granted this year after it was proven the site had been occupied for more than 10 years on breach of that condition.
An application for a certificate of lawfulness allows an applicant to stay at a development if they can provide proof of occupancy over a prolonged period.
Speaking at the meeting, agent Andrew Vaughan-Harries of Hayston Developments & Planning Ltd told members the original agriculture-only condition was a poor decision by planners back nearly four decades ago.
“When this application was made in 1988-89 we go back to the Preseli District Council – I was still in school – it was only a 50-acre farm, it should never have been approved as it shouldn’t have been viable.
“The current applicants have owned it for the last 20 years; they’ve tried to grow apples but couldn’t make a go of it and then went in to holiday lets. We can’t enforce redundant conditions from bad decisions made years ago.”
Approval was moved by Cllr Brian Hall and unanimously supported by committee members.
Business
Cwm Deri Vineyard Martletwy holiday lets plans deferred
CALLS to convert a former vineyard restaurant in rural Pembrokeshire which had been recommended for refusal has been given a breathing space by planners.
In an application recommended for refusal at the December meeting of Pembrokeshire County Council’s planning committee, Barry Cadogan sought permission for a farm diversification and expansion of an existing holiday operation through the conversion of the redundant former Cwm Deri vineyard production base and restaurant to three holiday lets at Oaklea, Martletwy.
It was recommended for refusal on the grounds of the open countryside location being contrary to planning policy and there was no evidence submitted that the application would not increase foul flows and that nutrient neutrality in the Pembrokeshire Marine SAC would be achieved within this catchment.
An officer report said that, while the scheme was suggested as a form of farm diversification, no detail had been provided in the form of a business case.
Speaking at the meeting, agent Andrew Vaughan-Harries of Hayston Developments & Planning Ltd, after the committee had enjoyed a seasonal break for mince pies, said of the recommendation for refusal: “I’m a bit grumpy over this one; the client has done everything right, he has talked with the authority and it’s not in retrospect but has had a negative report from your officers.”

He said the former Cwm Deri vineyard had been a very successful business, with a shop and a restaurant catering for ‘100 covers’ before it closed two three years ago when the original owner relocated to Carmarthenshire.
He said Mr Cadogan then bought the site, farming over 36 acres and running a small campsite of 20 spaces, but didn’t wish to run a café or a wine shop; arguing the “beautiful kitchen” and facilities would easily convert to holiday let use.
He said a “common sense approach” showed a septic tank that could cope with a restaurant of “100 covers” could cope with three holiday lets, describing the nitrates issue as “a red herring”.
He suggested a deferral for further information to be provided by the applicant, adding: “This is a big, missed opportunity if we just kick this out today, there’s a building sitting there not creating any jobs.”
On the ‘open countryside’ argument, he said that while many viewed Martletwy as “a little bit in the sticks” there was already permission for the campsite, and the restaurant, and the Bluestone holiday park and the Wild Lakes water park were roughly a mile or so away.
He said converting the former restaurant would “be an asset to bring it over to tourism,” adding: “We don’t all want to stay in Tenby or the Ty Hotel in Milford Haven.”
While Cllr Nick Neuman felt the nutrients issue could be overcome, Cllr Michael Williams warned the application was “clearly outside policy,” recommending it be refused.
A counter-proposal, by Cllr Tony Wilcox, called for a site visit before any decision was made, the application returning to a future committee; members voting seven to three in favour of that.
Farming
Farmers Union of Wales Warns: Labour’s 5G Expansion Risks Rural Blackspots
FUW Joins Landowners in Urgent Call to Pause Controversial Telecoms Reforms
THE FUW (Farmers’ Union of Wales) has warned that rural communities face worsening mobile blackspots and farmers risk losing essential income if the Labour Government expands a telecoms policy blamed for stalling Britain’s 5G rollout.
In a letter to Digital Economy Minister Liz Lloyd, the FUW aligns with landowners, investors, and property experts demanding a halt to Part 2 of the Product Security and Telecommunications Infrastructure (PSTI) Act 2022. Extending the 2017 Electronic Communications Code (ECC) would “entrench failure,” the group argues, sparking more stalled renewals, site losses, and legal battles just as Wales needs swifter rural connectivity.
The 2017 reforms empowered operators to cut mast rents—often by 90%—from hosts like farmers, councils, and NHS trusts. Far from boosting rollout, they’ve ignited over 1,000 tribunal cases since 2017, versus 33 in the prior three decades. Rural goodwill has eroded, with hosts now eyeing exits.
“Every lost mast isolates households, schools, and businesses,” the FUW states. “No public subsidy can fix this systemic damage.”
A survey of 559 hosts (via NFU, CLA, BPF) shows:
- 35% considering full withdrawal.
- 70% of expired lease holders facing operator legal threats.
Landowner Ted Hobbs in New Tredegar shares the pain: “My 1995 Vodafone lease was £3,500 yearly, renewed in 2010 at the same rate. It expired May 2025—now they demand a slash, backed by the Code. This is confiscation, not partnership.”
Labour’s push forward—despite earlier opposition and a critical consultation—ignores these red flags.
FUW President Ian Rickman adds: “Farmers hosted masts in good faith for rural connectivity. Punishing them with rent cuts sabotages Wales. Halt this now, restore trust, and incentivise real progress.”
The coalition urges ministers to reopen dialogue before deepening rural divides. Wales can’t afford more policy missteps.
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