Bydv 2022

[idle git]

Spring Beans or are they no good?
I have winter and will have springs for this harvest.

had 24 acres of spring beans that went in well in the first week of march , we harvested 11 tons

 

[JCfarmer]

had 24 acres of spring beans that went in well in the first week of march , we harvested 11 tons

Dry spring, I have drilled 43 acres of Winter beans this time and the rest destined for spring beans. Usually get on well with spring beans, this year not so great mind.

 

[JCfarmer]

Has the heavy rain washed the aphids away?

 

[yellow belly]

Has the heavy rain washed the aphids away?

Need a nice day to be able to see them
all reports say there are only small numbers in fields

imho the important bit for the aphids is surviving the winter
for bydv the important bit is infecting the aphids

the infectivity rate is 6% so 14 out of 15 are harmless

 

[Andrew K]

Such a ludicrous amount of those seed dressings were used on everything all the time it’s no wonder they got banned

We found them useful for the earliest sown crops really, or for situations a long way from home where spraying is a pain.
Seems silly to not use a seed dressing in the right circumstances only when it has potential to avoid multi applications later when bees are foraging etc.

 

[T Hectares]

Showing up in Oat cover crops, albeit August drilled…

 

[texelburger]

Showing up in Oat cover crops, albeit August drilled…View attachment 1080030

We have the same,August drilled Merlin spring oats as a cover crop/sheep keep. Approximately 50 % plus infected with BYDV.

 

[Old apprentice]

Not very practical but if it was possible to kill the crop where it is infected with bydv,would it reduce the infection in the afids?

 

[JCfarmer]

Out last week spraying insecticide and manganese.

 

[yellow belly]

Showing up in Oat cover crops, albeit August drilled…View attachment 1080030

How many per acre

 

[T Hectares]

How many per acre

Varies from field to field, around 5% infected at a guess

 

[ollie989898]

Out last week spraying insecticide and manganese.

I'd be going with manganese +++ whatever too judging by some of the fields I drive past. Few places where the crop is looking pished off.

 

[Old apprentice]

Varies from field to field, around 5% infected at a guess

What are your plans to try something to your crops with bydv.

 

[T Hectares]

What are your plans to try something to your crops with bydv.

They are cover crops and will be grazed off from next month

 

[Andrew K]

How resistant are BYDV carrying[or otherwise] aphids to -6c degrees of frost?

 

[ollie989898]

How resistant are BYDV carrying[or otherwise] aphids to -6c degrees of frost?

I think aphids have been around lot longer than a bit of cold British weather to concern themselves with the frost.

 

[Brisel]

At the AHDB conference today, it was mentioned that aphids who have mutated to be resistant to insecticides can be more susceptible to extreme cold. Whether or not the forecast cold snap is enough is another matter.

 

[yellow belly]

The forecast gives us a number of days of near freezing weather
if this does not kill aphids they will not be moving about or increasing in numbers
so in the next 3 months the Bydv problem going forward is now a very low risk of increasing

 

[yellow belly]

-4 here this morning and forecast to be colder every night till wednesday
that will stop them dead

 

[Hindsight]

Well the weather last week sorted that issue! My missed strips of insecticide will be neutral I expect. Hey ho. Roll the thread through until late October 2023 when we can start again the debate! Best wishes all.