Oilseed Rape & Peach potato aphid / Turnip Yellows Virus

Ugo79

Member
Location
The Shire
Has anyone found any Peach potato aphid in forward crops of rape this week?

Aphid monitoring sites have been showing steady increase in aphid catches recently (not surprising given the mild/hot weather).

I've only ever known neonic dressed raped (until this autumn) and don't know enough about the impact of Turnip Yellows virus... Are there any old timers or folk who regularly use undressed FSS with any experience of this disease?

With the astronomical cost of aphicide (Plenum, Teppiki, Biscaya etc) which controls the highly resistant Peach Potato Aphid the decision to spray is not an easy one!
 

Brisel

Member
Arable Farmer
Location
Midlands
Do pyrethroids not give a degree of repellency even if they don't actually kill anything anymore?

I haven't sown undressed osr seed but have seen some quite serious TuYV in the crop. I can't remember the year but around 2008-9 there was very high levels of infection in Lincolnshire. A mass infection of what is left of our osr after the flea beetle have had a go will be another nail in the coffin of this crop.
 

Ugo79

Member
Location
The Shire
Not sure about the repellency effect from pyrethroids - more likely we kill beneficial insects that keep aphid numbers in check! :(

Crops here have been sprayed with pyrethroids for CSFB (albeit only once several weeks ago) and I can find winged+wingless peach potato aphids in the more forward crops.

Reading around the subject it looks like MACE and Kdr resistance is ubiquitous, thus I fear we will have to bite the bullet and spray with a non-pyrethroid insecticide. :cry:
 

spikeislander

Member
Location
bedfordshire
Sprayed ours and others Thurs and Friday. Looks to good to risk.
 

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Chalky

Member
Cannot find a single aphid of any species in OSR either forward, or less so. Constantly looking, and when found I suppose its 'put up or shut up' time & spray a compound that will control them. No aphids, but plenty of cabbage root fly!
We are up by the Humber bridge, not the biggest veg/pot area- so maybe fewer aphids given that & the cooler influence of the river.
 

spikeislander

Member
Location
bedfordshire
Was going on agronomist recommendation really.
Using quorum, Boron, bittersalz, mn, adjuvant. I think quorum might be plenum under another name. Hopefully will give two weeks cover on osr and free me up for drilling and pre ems on wheat
 

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quote: “Red Tractor has confirmed it is dropping plans to launch its green farming assurance standard in April“

read the TFF thread here: https://thefarmingforum.co.uk/index.php?threads/gfc-was-to-go-ahead-now-not-going-ahead.405234/
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