Seed cost!

[Suffolk boy]

It won't be for much longer anyway, someone will isolate the genes for BYDV resistance and put them into their variety and it will be a thing of the past.

It's already happened but nothing commercial currently. There used to be a variety called Vixen that had tolerance

 

[FarmerBruce]

Pyrethroids work by shutting down the sodium channels in nerve cells (the channels in the membranes that surround the axons). This is a fairly novel way of working for insecticides or nerve agents, which traditionally worked by interfering with neuro-transmitters that flood between nerve cells.

This mode of action differs to that of pyrethroids, although to be fair the mammalian toxicity of pyrethroids is very very weak.

I am not 100% sure but from what I have read both of these molecules are an entire order of magnitude less troublesome and persistent.

Does deter have any action against gout fly at all do you know please

 

[yellow belly]

I have not sprayed for bydv since the 1980s

because when I found aphid and did not spray we had no bydv
the work done then found that provided the aphids were killed before march the levels of bydv were very low
when we have sufficient frost to kill the aphids the job is done naturally
as we have not used inscecticide and now notill we have a whole army of natural preditors that do the job for use

looking in fields yesterday I found no aphids in osr and 5 grain aphids on one oat plant in my cover crop the were a number of fast moving spiders and preditory beetles within a foot of the aphids
finding aphids when the sun gets low in the afternoon is straightforward ,just look to wards the west and look for a shadow on the leaf take a picture with your phone blow it up and identifiy the aphid

resistance to pyrethroid and neonic is inevitable especially if you rely on spraying regularly killing the benificials that survive cultivations

 

[ollie989898]

Does deter have any action against gout fly at all do you know please

I can't remember, I am sure Deter or Austral plus does them?

 

[wellingtonfarmer]

Both my suppliers are sold out.

I'll probably have 500kgs+ of Mascani seed left over if you know of anyone wanting it?

 

[Gong Farmer]

Does deter have any action against gout fly at all do you know please

Some, but not as good as Dursban (was)

 

[Gong Farmer]

It's already happened but nothing commercial currently. There used to be a variety called Vixen that had tolerance

Never understood why that wasn't developed into other vars. Vixen never took off because it was lower yielding than the likes of Pastoral, Plaisant etc and BYDV could be controlled with a cheap spray. Now it looks like we'll need variety resistance soon.

 

[Barry]

There are varieties with 'tolerance' coming through, currently 6-rows, but in due course it will become pretty much a standard like BaYMV.

But it is a tolerance not a resistance. So the plant gets the problem but doesn't suffer the yield deficit in the same way.

There will be commercially available seed next year I expect but as said, it will be 6-rows for a few years...


Barry