new to growing beans. Agronomist has been to see them and says he’s seen black aphid pressure. I spray with a normal tractor on row crops so will push them down a lot also the Chem isn’t very nice for bees. He said it’s up to me if I spray but he thinks it could affect yield considerably would you spray?
Black bean aphids would you spray
- Thread starter tr250
- Start date
How many plants per m2 are colonised with black been aphids? They often look worse than they are
yellow belly
Member
- Location
- south west lincolnshire
4 years ago I had some bb aphid in my beans 2 weeks later there were non but every plant that had bb aphid had large numbers of lady bird larvae
patience will pay off I do not now spray any insecticide in beans because it is a waist of money
pgro has never shown pea and bean weaval damage to reduce yield but it reduces preditors
the aphid spray will not kill all of them but will reduce your lady birds
if you have not sprayed for pea and bean weaval or brichid then you will have a lot of ladybirds just give them chance to breed up
if you do spray honey bees do not get out before breakfast so spray before then but bumble bees can operate much earlier
use aphox
patience will pay off I do not now spray any insecticide in beans because it is a waist of money
pgro has never shown pea and bean weaval damage to reduce yield but it reduces preditors
the aphid spray will not kill all of them but will reduce your lady birds
if you have not sprayed for pea and bean weaval or brichid then you will have a lot of ladybirds just give them chance to breed up
if you do spray honey bees do not get out before breakfast so spray before then but bumble bees can operate much earlier
use aphox
kingfisher
Member
- Location
- East Anglia
I have some on the headlands, but none 20 metres into field, predators starting to build up so will not be spraying here.
- Location
- Berkshire
I have a few about, but no insecticide has been used.
My Beans are well podded and are heading towards the end of flowering so won't be treated
BB aphid are more of a problem if they come in at early flowering.
My Beans are well podded and are heading towards the end of flowering so won't be treated
BB aphid are more of a problem if they come in at early flowering.
Robm 1959
Member
- Location
- West Sussex
Got odd plants playing hosts to aphids. Lots of ladybirds out there to keep them company! Beans are well podded and more worried about the choc spot that’s starting after the rains, so they had another fungicide yesterday
What insecticide have they recommended? Since you’ve mentioned pushing the crop down I’m assuming a nice thick canopy of winter beans. Aphox would be aphid specific but if you see any beneficials like ladybirds, harlequins, lacewings or hover flies in there I’d avoid treatment or at least do a trial plot with photos before and after, tied with yields.
As above, if the crop really is that thick then it will tolerate some aphid pressure. Thanks for asking the question in TFF
Yes winter beans and quite nice and thick. Seen plenty of ladybirds and plenty of other insects although I’m not sure which ones. Aphox is what’s recommended. Agronomist has done his job and told me but said it’s my decision. Aphox is in the shed ready but can go back so at the moment I’m not going to do them but if it gets a lot worse I can.What insecticide have they recommended? Since you’ve mentioned pushing the crop down I’m assuming a nice thick canopy of winter beans. Aphox would be aphid specific but if you see any beneficials like ladybirds, harlequins, lacewings or hover flies in there I’d avoid treatment or at least do a trial plot with photos before and after, tied with yields.
As above, if the crop really is that thick then it will tolerate some aphid pressure. Thanks for asking the question in TFF
No other reason at present
I’ve decided not to do it at present but if I was I would do it at dusk would that be kinder on bees?
Got to put a fungicide on the beans but the agronomist has said no need for insecticide so as I haven’t grown beans for a very long time I am in his hands (haven’t used insecticides on wheats or barley for years) but we have lots of beneficial things in there and don’t want to destroy them
Do you think you’ve lost many flower/pod sites where the colonies have been?
yellow belly
Member
- Location
- south west lincolnshire
Better to spray in the early morning
Honey bees are not usually out before 10 am
Bumble bees can be in early
Aphox is bee safe
You do need to go into the middle of field as the bbhid are often more concentrated on the headland
Possibly, but the level of infection was very low , I doubt it was more than 1 stem in 2 or 300.
- Tags
- agronomist aphids insecticide pgr yields
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