Pea and bean weevil

[Wheatseeker]

Any tips on Pea and bean weavil control in spring beans? Product choice, rate, water volumes, time of spraying ?? Do any make any difference?
Have got reasonable, rolled seedbeds and some fields are getting hit hard despite having been sprayed. Others have little damage. They are what they are in terms of establishment method and a good rain would certainly help more than anything.

 

[CJS]

Any tips on Pea and bean weavil control in spring beans? Product choice, rate, water volumes, time of spraying ?? Do any make any difference?
Have got reasonable, rolled seedbeds and some fields are getting hit hard despite having been sprayed. Others have little damage. They are what they are in terms of establishment method and a good rain would certainly help more than anything.

Never had anything do any good Rain is the only solution unfortunately

 

[Zippy768]

I have a little damage on our spring beans, but is growing well (we had rain on friday).
I cant find the little critters tho, so maybe got washed away last week.
Have chem but not applying. If I cant see them, I can spray them ?‍.

When are they supposedly active?

 

[Steevo]

Plenty of notching in winter beans here. Can spot a few of them on the leaves here and there.
Will see how growth continues as to whether they have a spray of Mavrik.

 

[Bogweevil]

Overwinters in rough vegetation, hedges, so damage most marked along headlands form March, feed until May. Eggs hatch quickly and larve done s feeding on legiume roots by July. Pupate and hatch around cereal harvest when they find peas already cut and beans coarse and unpalatable. Those that don't contaminate grain may feast on any nearby undersown clover and lucerne.

 

[ConanPB]

Agronomist called last week to say beans needed spraying. Have chemical (lambda star) but reluctant to apply it. Been monitoring every couple of days and on the whole crop growing away from them. May have to spray the heavy land areas where establishment not so good and crop is thinner. Same when we used to grow peas - the crop usually out competes them. Seem to be most active in the heat of the day.

 

[MrNoo]

A friend was on today on his 2nd trip through his winter beans for them, he sprayed last week. Yet I walked some of next door's Spring beans that had been put in with a JD750 direct drill just for a nosey and they looked fine, no signs.

 

[Flat 10]

We have notching inWB every year, agronomist mentions it and we ignore it and everything is fine. This year had 2 fields, same soil type establishment etc etc but one really not picking up. Investigated today and some plants had 6-7 weevils on them. Will be getting lambda ASAP. Not treating the lightly affected field. Always thought of them as a spring bean issue.

 

[Brisel]

I would avoid spraying pea & bean weevil. You need to hit the flying adults as once the larvae have burrowed underground you're just causing collateral damage. I don't spray for bruchid either for similar reasons. Those that have sprayed for either don't seem to have better crops but they certainly will have slaughtered lots of beneficial insects

 

[Flat 10]

I would avoid spraying pea & bean weevil. You need to hit the flying adults as once the larvae have burrowed underground you're just causing collateral damage. I don't spray for bruchid either for similar reasons. Those that have sprayed for either don't seem to have better crops but they certainly will have slaughtered lots of beneficial insects

Even at 6-7 active foraging adults per plant? Never worried about the odd notch but I think these are going backwards fast and I will be treating. Only 20% of my area.

 

[Flat 10]

I would avoid spraying pea & bean weevil. You need to hit the flying adults as once the larvae have burrowed underground you're just causing collateral damage. I don't spray for bruchid either for similar reasons. Those that have sprayed for either don't seem to have better crops but they certainly will have slaughtered lots of beneficial insects

Even at 6-7 active foraging adults per plant? Never worried about the odd notch but I think these are going backwards fast and I will be treating. Only 20% of my area.

 

[Brisel]

PGRO have recommended spray thresholds. I haven’t looked at their website recently.

 

[Steevo]

I would avoid spraying pea & bean weevil. You need to hit the flying adults as once the larvae have burrowed underground you're just causing collateral damage. I don't spray for bruchid either for similar reasons. Those that have sprayed for either don't seem to have better crops but they certainly will have slaughtered lots of beneficial insects

I would agree with the sentiment of this - I'd like to avoid spraying it if I can and if the crop will grow away. Hopefully a few ladybirds will appear and multiply and in turn knock the population down.

 

[Badshot]

Not much evidence of them here at the mo.
Late march drilled tundra winter beans.

 

[Flat 10]

I would agree with the sentiment of this - I'd like to avoid spraying it if I can and if the crop will grow away. Hopefully a few ladybirds will appear and multiply and in turn knock the population down.

You reckon a ladybird will eat a pean and bean weevil?!?! I must be looking at the wrong things

 

[Steevo]

You reckon a ladybird will eat a pean and bean weevil?!?! I must be looking at the wrong things

Haven’t a clue if I’m honest - it was a huge assumption. They do look rather large buggers I’ll admit - bit like small rice grains from what I could see.

 

[Flat 10]

I was always told "assumption is the mother of all F**k ups........"

 

[Steevo]

I was always told "assumption is the mother of all F**k ups........"

There is that....!

Well I’m sure another bug will eat them......

 

[yellow belly]

i donnot spray ever as when i asked pgro the damage has not shown up in any yield trial
reducing the numbers never gave a yield increase

but if you spray you then generally have to spray for black bean aphid

when we stopped spraying for bruchid we found that black bean aphids were controlled by lady birds which kept number of plants affected below 0.1 percent 1 in a 1000

 

[Wigeon]

Anyone else noticed tiny flea beetles on their beans? Plenty about here, soaking up the sunshine on a nice green leaf. Not going to spray for weevils if I can possibly avoid it, but just curious on the csfb though.