Aphids.
- Thread starter juke
- Start date
Feldspar
Member
- Location
- Essex, Cambs and Suffolk
Yes, fair enough. That's another gripe I have. Even if I did have average yield impacts, or some averaged relationship between observed aphid numbers in the autumn against predicted yield effect, I would have no idea how much to bump the expected yield hit down given that I am in East Anglia and 120m above sea level in big open fields. It's like stabbing in the dark.
I've had a look at some past posts from @juke I reckon he is way up North, possibly in the Darlington area, as he knows Stuart Vernon
Hindsight
Member
- Location
- Lincolnshire
Resistance to pyrethroids has been detected in Grain Aphid. Read up on it. As ever AHDB helpful source of info.
https://cereals.ahdb.org.uk/media/525211/214-0004-fpr.pdf
Hindsight
Member
- Location
- Lincolnshire
https://cereals.ahdb.org.uk/monitoring/aphid-news.aspx
The AHDB aphid page gives links to various sources of useful information.
The AHDB aphid page gives links to various sources of useful information.
- Location
- Cirencester
The amount of Ladybirds about down here, I wouldnt think there are many aphids left at all, place is full of them.
yellow belly
Member
- Location
- south west lincolnshire
in the 980s when bydv was rife because all wheat was planted in September and half the crop was in the row by 20 September whe need to spray was much higher
but it was found that if the wheat was not early emerged and the winter had aphid killing weather the yield loss was negligible if the winter was mild spraying in march was as effective as spraying in the autumn
if the aphid you find are grain aphid then pyrethroid will not kill them identify the aphid type
I have not used aphicide on wheat for over 30 years so have a good level of beneficials if you have regularly sprayed then the risk is bigger but if you have used deter and not sprayed the risk is lower if you have not sprayed any other crops with pyrethroid then I would wait till after the winter
if wheat emerged a month ago and is at 3 leaf and you have found aphids then spraying may be needed but you should have used deter
aphids do not thrive in dry conditions
compared to the 80s there are fewer grass crops around most grass is silaged regularly or has been grazed tight killing aphids
this year it was also very brown in the summer not good aphid conditions they thrive in warm and wet not hot and dry
but it was found that if the wheat was not early emerged and the winter had aphid killing weather the yield loss was negligible if the winter was mild spraying in march was as effective as spraying in the autumn
if the aphid you find are grain aphid then pyrethroid will not kill them identify the aphid type
I have not used aphicide on wheat for over 30 years so have a good level of beneficials if you have regularly sprayed then the risk is bigger but if you have used deter and not sprayed the risk is lower if you have not sprayed any other crops with pyrethroid then I would wait till after the winter
if wheat emerged a month ago and is at 3 leaf and you have found aphids then spraying may be needed but you should have used deter
aphids do not thrive in dry conditions
compared to the 80s there are fewer grass crops around most grass is silaged regularly or has been grazed tight killing aphids
this year it was also very brown in the summer not good aphid conditions they thrive in warm and wet not hot and dry
Isn't this just another case of some straightforward communication being required? Grower says no insecticide on wheat please, agronomist says OK but risks are X Y Z (according to the variables discussed here) - decision is then made with no blame or praise apportioned depending on how it pans out.
If communication / trust is so bad for this approach to be a non starter then I would suggest BYDV is only part of the problem....
If communication / trust is so bad for this approach to be a non starter then I would suggest BYDV is only part of the problem....
shakerator
Member
- Location
- LINCS
I will be spraying here have found aphids and average temps being high they will pop out kids and grandkids fast
I don’t think the effect on beneficial is that high if you have a good residue cover on the topsoil
I don’t think the effect on beneficial is that high if you have a good residue cover on the topsoil
Feldspar
Member
- Location
- Essex, Cambs and Suffolk
Did you treat with Deter?
shakerator
Member
- Location
- LINCS
Oilseed
Member
- Location
- North Cambs
Would an aphid even be able to fly into the crop in this wind?
Feldspar
Member
- Location
- Essex, Cambs and Suffolk
Probably not upwind unless they tack! Probably make it in on a nice broad reach.
- Location
- the brecks norfolk
I'm not a fan of insecticides but ill use them when needed.
My question is are they really as deadly to all the benifical as many on here believe them to be, after all we're in a world now that if you fart in the wrong direction there's a group or some environmental lobby that will shout from the roof tops how deadly it is to the rainforest or the environment ect.
So if these insecticides do wipe everything out and are that potent to all the bugs living our fields how come there's been no mention of it and they're not all banned.
My question is are they really as deadly to all the benifical as many on here believe them to be, after all we're in a world now that if you fart in the wrong direction there's a group or some environmental lobby that will shout from the roof tops how deadly it is to the rainforest or the environment ect.
So if these insecticides do wipe everything out and are that potent to all the bugs living our fields how come there's been no mention of it and they're not all banned.
- Location
- Worcestershire
I’ve got some of the a3 sticky yellow pads . Yourd be amazed how many little bugs stick to them . Always mostly aphids tho. Not sure what I’m learning. We have had very bad aphids in the past with very , very bad yields resulting from the patches of effected crop. When we couldn’t get insect on . I won’t plan to risk it here without deter. Lots of old little 2 -3 acre grass fields and big hedges round here. Did it at 2 leaf last autumn no problems.
yellow belly
Member
- Location
- south west lincolnshire
Insecticide kills insects so if you are aiming at aphid you hit all the other insects
It is important to identify the type of aphid because some are resident to pirethroid so spraying will not control them but will kill the predator it contacts
If wheat in this area was not emerged till October then spraying in March will be as effective as now but if there is a cold snap then you do not need to
Grain aphid not controlled
It is important to identify the type of aphid because some are resident to pirethroid so spraying will not control them but will kill the predator it contacts
If wheat in this area was not emerged till October then spraying in March will be as effective as now but if there is a cold snap then you do not need to
Grain aphid not controlled