Pea & bean weevil damage

[moretimeforgolf]

Our spring beans have been emerging nicely with this warm spell but they are being heavily notched by weevils.
Does anyone know the economic damage to the crop? My agronomist has told me that they can cause problems underground.
I hate using insecticides but this is the one point in the rotation where I am close to caving in!

 

[Brisel]

They are munching mine too. PGRO website has a good guide to this and just about any other aspect of pulse husbandry. You’ll need to register but it’s free.

I have never treated for weevil damage. As long as there’s some leaf left it will grow away from damage very quickly.

 

[B'o'B]

Our spring beans have been emerging nicely with this warm spell but they are being heavily notched by weevils.
Does anyone know the economic damage to the crop? My agronomist has told me that they can cause problems underground.
I hate using insecticides but this is the one point in the rotation where I am close to caving in!

Yes it’s the grubs feeding on the nodules that is generally the yield robber after mummy and daddy have nibbled the leaves. I try and tolerate them in peas but there does come a point.

 

[Captain Mainwaring]

I don't usually bother about them either but ours are just emerging and there's significant damage on the growing point. I don't know about the economic damage at the moment, was thinking of calling on pgro, but from what I'm seeing I'll err on the side of caution and treat.

 

[moretimeforgolf]

I think I’ll stick to my guns and refrain from ordering any insecticide. I pretty sure we’ll have enough green leaf left.

 

[Grass And Grain]

How effective is the insecticide these days?

 

[Matt77]

I did mine over the weekend as I’m pretty sure it’s not just the notches you need to worry about, it’s the larval root feeding that follows.

 

[dirty harry]

You’d be better to chuck some manganese & phosphite on to get it up n away quicker in my experience?
Cheers dh

 

[Chalky]

To be honest I really do not understand this abhorrence of using insecticides in crops.

We invite pests by sowing monocultures-we positively encourage them. I sprayed my winter beans and they grew 3 inches in a week-weevils will hold bean crops back badly in a dry time.

Would you all sit idly sit by and let yellow rust f*** your wheat crops? if the answer is no, then why get so excited about having to use an insecticide when you have actively encouraged whatever pest to try and fulfill its life cycle in your field. And yes the larvae can make your beans end up 12 inches high if they get a hold-all plants require nitrogen, and the weevil larvae as stated feed on the root nodules. In my experience it is uncommon, i have only seen it once. That does not take away the nagging damage that the adults do that in a stressful season, is the last thing a spring crop needs.

If you farmed in warmer climes with such a pc agenda-you would likely not harvest much.

Expecting much grief from this post from the more 'enlightened'.

 

[Bogweevil]

To be honest I really do not understand this abhorrence of using insecticides in crops.

We invite pests by sowing monocultures-we positively encourage them. I sprayed my winter beans and they grew 3 inches in a week-weevils will hold bean crops back badly in a dry time.

Would you all sit idly sit by and let yellow rust f*** your wheat crops? if the answer is no, then why get so excited about having to use an insecticide when you have actively encouraged whatever pest to try and fulfill its life cycle in your field. And yes the larvae can make your beans end up 12 inches high if they get a hold-all plants require nitrogen, and the weevil larvae as stated feed on the root nodules. In my experience it is uncommon, i have only seen it once. That does not take away the nagging damage that the adults do that in a stressful season, is the last thing a spring crop needs.

If you farmed in warmer climes with such a pc agenda-you would likely not harvest much.

Expecting much grief from this post from the more 'enlightened'.

Well if the field/farm has a history of damage then it is reasonable to spray early rather than go through the rigmarole of trapping and counting. Other farms/fields might require a more nuanced approach.

 

[Brisel]

To be honest I really do not understand this abhorrence of using insecticides in crops.

We invite pests by sowing monocultures-we positively encourage them. I sprayed my winter beans and they grew 3 inches in a week-weevils will hold bean crops back badly in a dry time.

Would you all sit idly sit by and let yellow rust f*** your wheat crops? if the answer is no, then why get so excited about having to use an insecticide when you have actively encouraged whatever pest to try and fulfill its life cycle in your field. And yes the larvae can make your beans end up 12 inches high if they get a hold-all plants require nitrogen, and the weevil larvae as stated feed on the root nodules. In my experience it is uncommon, i have only seen it once. That does not take away the nagging damage that the adults do that in a stressful season, is the last thing a spring crop needs.

If you farmed in warmer climes with such a pc agenda-you would likely not harvest much.

Expecting much grief from this post from the more 'enlightened'.

I'm not sure rust is a good comparison as there is no control in nature but you have made an excellent point there

 

[Chalky]

Which bit?

Not being suitably enlightened?

 

[Brisel]

Which bit?

Not being suitably enlightened?

I agree with the bit about not letting the larvae eat the root nodules by spraying the adults on the leaves.

 

[ZXR17]

I shall be spraying mine tomorrow. Cyper knocks them down pretty quickly. They can do a lot of damage when the weather is hot and the beans are only emerging slowly.

 

[ollie989898]

Spray the fudging weevils. Put manganese and phosphite on too. Spray again 10 days later.

Do not allow rust in the crop whatsoever.

Stop being a gang of old dears over insecticides!