Pea and Bean Weevil 2019

[Shutesy]

Been back through some past threads on this to try and find some wisdom on these critters. I understand how they work with the adults notching leaves and then the larvae burrowing underground and feeding on the root nodules. Have sprayed in previous years on S. Beans which have grown away normally helped by some rainfall but never left any areas unsprayed as a test!
Got damage on nearly every leaf on my combineable peas now this year. Its warm and dry here (and continuously windy it seems). Moisture 3 inches down and peas are now about 2 inches tall with at least 4 leaves but very dry on top which is slowing growth I think.
Best thing for them would probably be a good soaking and perhaps a dose of Mn but I'm undecided whether to spray the insecticide or not. Have seen research showing resistance to pyrethroids from P and B Weevil! When walking the fields the plant damage is obvious but it is very hard to find any Weevils so what would my spray be hitting?? Also quite hard to find a decent spray window with no wind to apply a fairly fine spray to ensure I do hit anything. Leaning towards the side of not bothering. What do others think? 70 ac to do so 2 tankfuls!

 

[Brisel]

The real damage is from the larvae feeding on the rhizobia root nodules. The leaf consumption is no big deal as long as it's not too severe. Personally, I wouldn't bother treating for it & the weather is helping that decision.

The environmentalist in me would suggest a sticker adjuvant and a good dose of garlic or some other useful repellent!

 

[moretimeforgolf]

Our peas are just emerging. I'm having the same dilemma but will not use an insecticide because of the collateral damage. A biological alternative would be the ideal solution.

 

[Shutesy]

The environmentalist in me would suggest a sticker adjuvant and a good dose of garlic or some other useful repellent!

I think there is some potential in using something like garlic to cover the smell of emerging peas/beans or OSR from weevils/flea beetles etc. I'm sure that's how they find there food source and migrate in. Wants spraying just as stuff emerges I would think. To early and the smell might wear off before the plants are big enough, to late (like this spring perhaps) and the weevils/beetles are already in the crop.

 

[Shutesy]

Our peas are just emerging. I'm having the same dilemma but will not use an insecticide because of the collateral damage. A biological alternative would be the ideal solution.

Does anybody know what predates Pea and Bean Weevils??

 

[Brisel]

The lesser spotted sprayer...

 

[Try to succeed]

Been back through some past threads on this to try and find some wisdom on these critters. I understand how they work with the adults notching leaves and then the larvae burrowing underground and feeding on the root nodules. Have sprayed in previous years on S. Beans which have grown away normally helped by some rainfall but never left any areas unsprayed as a test!
Got damage on nearly every leaf on my combineable peas now this year. Its warm and dry here (and continuously windy it seems). Moisture 3 inches down and peas are now about 2 inches tall with at least 4 leaves but very dry on top which is slowing growth I think.
Best thing for them would probably be a good soaking and perhaps a dose of Mn but I'm undecided whether to spray the insecticide or not. Have seen research showing resistance to pyrethroids from P and B Weevil! When walking the fields the plant damage is obvious but it is very hard to find any Weevils so what would my spray be hitting?? Also quite hard to find a decent spray window with no wind to apply a fairly fine spray to ensure I do hit anything. Leaning towards the side of not bothering. What do others think? 70 ac to do so 2 tankfuls!

I’m in the same boat here, and same growth stage. Our peas seem to be growing well however there is damage on nearly every plant. I’m hoping this storm/hopefully plenty of rain (desperate) will slow the weevil down. I don’t want to waft insecticide about; although this reluctance has had a penalty in some osr this year. Out of interest what variety are you growing? Do they always stand for you?

 

[Shutesy]

I’m in the same boat here, and same growth stage. Our peas seem to be growing well however there is damage on nearly every plant. I’m hoping this storm/hopefully plenty of rain (desperate) will slow the weevil down. I don’t want to waft insecticide about; although this reluctance has had a penalty in some osr this year. Out of interest what variety are you growing? Do they always stand for you?

We are growing Kingfisher, first year growing them myself. Picked for there stiffness rating over the likes of Prophet which were last grown on this farm about 10 years ago (before my time) and they got dropped as to many harvests they went flat so hoping for an improvement .
I didn't spray my OSR for flea beetle once, probably just got very lucky, I couldn't find them doing enough damage to justify spraying in my head at the time. I have a few bare/stunted patches which I think are probably flea beetle/pigeon damage on the stunted bits and slug damage on the bare bits but I don't think spraying an insecticide all over the crop would have made any difference to what I have now tbh.

 

[Tractor Boy]

My peas are struggling with pea and bean weevil as well. Drilled on 21st March there are some only just above ground and being notched badly. Interestingly the field is half sand and half chalk. The damage and slow growth is far worse on the chalk. PGRO email the other day said thrips are being very problematic this season especially on chalk.
I’m not going to spray as I suspect nothing will get to the thrips inside the leaves and I’ll ptobably kill more beneficials than weevil.

 

[Flat 10]

My peas are struggling with pea and bean weevil as well. Drilled on 21st March there are some only just above ground and being notched badly. Interestingly the field is half sand and half chalk. The damage and slow growth is far worse on the chalk. PGRO email the other day said thrips are being very problematic this season especially on chalk.
I’m not going to spray as I suspect nothing will get to the thrips inside the leaves and I’ll ptobably kill more beneficials than weevil.

We have had success with pyrethroids and thrips. If you get them on your hands when you examine them I would spray. The crop won’t get away from them easily. Conversely I wouldn’t treat for pea and bean weevil, feel I should dig some up to examine nodules closely.

 

[Brisel]

By the time the larvae have got to the nodules it is far too late for any insecticide. Nothing will get down there.

 

[Flat 10]

By the time the larvae have got to the nodules it is far too late for any insecticide. Nothing will get down there.

I know. Just interested to see if I can see what damage they are doing.....

 

[yellow belly]

if they have aready notched the leaves possibly under ground is it too late
have they already laid enough eggs

have spring beans and hve never sprayed before and not planning to as killing all the benificials and making the pests resistant is a self defeating practice
and once sprayed then the next pest has a free go
black bean aphids are controlled by lady birds if the beans are left unsprayed
bruchid spraying is a waist of time

 

[Poncherello1976]

if they have aready notched the leaves possibly under ground is it too late
have they already laid enough eggs

have spring beans and hve never sprayed before and not planning to as killing all the benificials and making the pests resistant is a self defeating practice
and once sprayed then the next pest has a free go
black bean aphids are controlled by lady birds if the beans are left unsprayed
bruchid spraying is a waist of time

Notching on my peas. Agronomist out the other day, and said I should spray them. I am now thinking it is too late, and will probably just go through with some Mn. I will have a look at the nodules tomorrow, and see if I can find anything.

 

[B'o'B]

Notching on my peas. Agronomist out the other day, and said I should spray them. I am now thinking it is too late, and will probably just go through with some Mn. I will have a look at the nodules tomorrow, and see if I can find anything. View attachment 792614View attachment 792616

That doesn’t look too bad at all in the second picture. It looks like what that crop wants more than anything is some H2O!

 

[Poncherello1976]

That doesn’t look too bad at all in the second picture. It looks like what that crop wants more than anything is some H2O!

Yeah. They certainly could. Storm Hannah did not bring much, and now the forecast is dry again. There is a bit below the surface so that will have to do for them!

 

[yellow belly]

If it stays dry there will be no gain from spraying just increase the problem next time

 

[Rihards]

Growing beans and Peas many years.. Despite leaf demage never got idea to spray insekticide šo early on ... Especialy on Peas.

 

[carbonfibre farmer]

First time in peas on this land in quite some time.
Bottom end of the field.

Top end much happier.

@Richard98 has some beans across the road but I didn't go stomping through them to look, see how they are.

 

[Richard98]

First time in peas on this land in quite some time.
Bottom end of the field.
View attachment 792922

Top end much happier.
View attachment 792926

@Richard98 has some beans across the road but I didn't go stomping through them to look, see how they are.

There’s plenty of notches in the beans across the road [emoji849] they had an insecticide on the 19th before there were many notches at all but it hasn’t made much difference it seems [emoji23] is it due to mild weather that the weevil seem to be out earlier this year?