bean weevil and bruchid beetles

Discussion in 'Direct Drilling Crops & Agronomy' started by juke, Mar 10, 2019.

  1. juke

    juke Member

    Location:
    DURHAM
    thought this might be the best place to ask, we aren't using insecticides but I was wondering if people get to a point that forces them into using insecticides if they find an infestation of the above or do they just take the chance that beneficals will keep the damage to a minimum ..

    this is our first full season of no insectcides at all including seed dressings n nothing out the sprayer for 2 seasons if that has any baring on the issue above.
     
  2. Flat 10

    Flat 10 Member

    Location:
    Fen Edge
    Not DD but never sprayed bean weevil and given up with bruchid years ago. However they are definitely a problem I just find that spraying makes no difference. I have had to spray beans for thrips before and I believe if I hadn’t would have suffered severe yield loss. Very few insecticides used elsewhere on the farm.
     
    juke likes this.
  3. Adeptandy

    Adeptandy Member

    Location:
    PE15
    Im trying too avoid insecticides on everything from the sprayer, much to my agronomists nay saying, have used Austral Plus on the wheat and Deter on the W Barley this year due to coming out of HLS grass on 1 block though :cautious:
     
    juke likes this.
  4. Brisel

    Brisel Member

    Location:
    Dorset
    I also avoid insecticides where possible but did treat for weevil on young bean plants last year because of excessive pressure. The leaf notching was tolerable but the numbers seen would have damaged the root nodules. By the time the crop was at flowering the drought and high temperatures made it already beyond the point of wanting to spend any more, not that I'd spray for bruchid anyway. Other local growers who did still got downgraded to feed for bruchid damage which made me feel a little better!
     
    tw15 and juke like this.
  5. farmerm

    farmerm Member

    Location:
    Shropshire
    I try to avoid insecticide use but too often beneficial insect populations lag well behind when the population of pest insects are exploding...

    Last year my neighbour sprayed for Brucid twice, I didn't, neither of us could find a bean at harvest without a hole...

    I am still in 2 mind about how effective attempts to control weevil here have been in the past.
     
    juke likes this.
  6. cows r us

    cows r us Member

    We use to spray for bruchid on our farm, we probably still lost the quality in the beans 7out of 10 years so we gave up. I don't think we have seen any difference since ditching the insecticide.
     
    Hobbit, farmerm and juke like this.
  7. parker

    parker Member

    Location:
    south staffs
    I haven't sprayed for 4 years now, I find the longer I go the less trouble I have as predators keep building year on year, beans have also made seed quality for the last 4 years so pretty pleased at the moment
     
    martian, Flat 10 and Brisel like this.
  8. Badshot

    Badshot Member

    Location:
    Kent
    Beans don't fail seed because of bruchid.


    It's only the Egyptians dislike of holy beans that gets them downgraded.
    Mine were quite high bruchid this year, but still made human grade because of the abysmal quality and yields elsewhere.
     
  9. Flat 10

    Flat 10 Member

    Location:
    Fen Edge
    '
    :ROFLMAO:
     
    Steevo and martian like this.
  10. cows r us

    cows r us Member

    On top of that does the premium cover the cost of the extra spray?
     
  11. Badshot

    Badshot Member

    Location:
    Kent
    Not in my view, no.
    To go through as often as the bruchid forecast wants means just insecticide in the tank, so the extra passes, extra damage, extra chems outweigh the premium imo.
    Plus I like to think I get more yield due to better pollination as the bees are left alone to do their stuff.
     
  12. Proper cold winter is the only effective control of bruchid I have seed

    The other solution is no beans in the district for a couple of years

    Beans sprayed multiple times will reduce the benificials in the field for years
    Black bean aphid is only a problem when insecticide is used for weaval or bruchid My beans have enough lady birds to control bb aphid
     
    cows r us, juke, Badshot and 3 others like this.
  13. spoke to pgro
    they said when any one has investigated pea and bean weevil treatment it has not shown any yield benefit comparing nodules being eaten and no nodules being eaten
    so I am now happy not to have sprayed
     
    Flat 10 likes this.
  14. Brisel

    Brisel Member

    Location:
    Dorset
    Any thoughts @Fromebridge ?
     
  15. Fromebridge

    Fromebridge Member

    Location:
    Glos
    Not sure we have ever generated a yield response to weevil sprays, any warnings about nodule damage has come from text books rather than trials records or field observations. I'll check archives later if I get chance. Spoke to someone at Cereals yesterday who had seen significant notching on spring bean leaves, eventually got a spray on but eggs may have been laid by then as crop turned yellow soon after and he was tempted to put some N on. He didn't (obviously) and crop recovered to be healthy now and waist high. Maybe that alludes to PGRO comment?
     
    Brisel likes this.

Share This Page