OBM / Lemon Midge

Discussion in 'Cropping' started by John Slejpner, May 24, 2019.

  1. Spotted a few of each colour in 60% ear emerged Skyfall this pm. At least two lemon for every orange.
    I thought one of the fringe benefits of the ground being so dry would be no midge till rainfall...seems i was wrong. Nowhere near spray threshold.

    More disappointing in a way, and very surprising, was the number of aphid present. I had noticed a few peach and more green on leaves 1 and especially 2 earlier in the week but their numbers have just exploded. Peach are colonising on the ear..maybe 1 ear in 50 so far..and one colony of black (bean i assume) aphid on ear also.
    In 20 years of spraying i have never sprayed aphid at this time of year. Can't remember ever coming close to needing to.
    In the 80/90's my father did plenty, but those were different times.

    Re natural predators i have to admit to wondering where my spiders have gone. I few ladybirds about, but they are obviously not making an impression. 40 ml of autumn Hallmark on most of what i was looking at this PM.
    No autumn insecticide on later drilled wheat not yet on ear, but i know there are a few aphids in these crops also.
     
  2. In reality i am waiting for a likely midge explosion before throwing stones.
    But just focusing on the ear aphid, what is considered the responsible strategy these days?
     
  3. BigBarl

    BigBarl Member

    Location:
    South Notts
    Yep I saw midge flying and on the ground this afternoon. Like you I didn’t expect to see any as there has been no rain. I couldn’t tell if I saw Lemon or orange I didn’t look close enough. If there are a lot of lemon I would say spraying is worthwhile as they take the whole grain site out where as orange just cause it to shrivel to my understating of the two.
     
  4. BenB

    BenB Member

    Location:
    Newbury, Berks
    Colleague sent me the below from Hampshire earlier today :( But apparently they had 8mm rain last Sunday. I haven't seen any significant numbers yet...

    Photo 24-05-2019, 16 58 18.jpg
     
  5. snarling bee

    snarling bee Member

    Location:
    Bedford
    Seen lemon around here, but no ears out yet. Quite a few lemon last year.
    I don't understand why varieties can be resistant to orange BM, but there is no resistance to lemon. Pest of the future I think.
     
  6. Brisel

    Brisel Member

    Location:
    Dorset
    No midges nor aphids here yet. I had a few little pockets of WOBM damage in unexpected places last year, but I was glad I didn't spray. The patches were showing up as damaged grain at harvest & you could see the orange debris in the combine.

    A responsible strategy is not to spray but to have habitat for beneficials.

    https://ahdb.org.uk/aphid-news
    https://ahdb.org.uk/wheat-blossom-midges
     
    John Slejpner likes this.
  7. Fromebridge

    Fromebridge Member

    Location:
    Glos
    I've seen several pics like that but it's too late to treat, those adults are laying eggs so it's already too late.
     
  8. Robm 1959

    Robm 1959 Member

    Location:
    West Sussex
    I had it suggested to me that I should add stealth with T2 as an anti feed for the OWBM.Anyone else ever heard of this ?? I didn’t ( I didn’t spray the pollen beetle in the rape either, hope I don’t live to regret that !!
     
  9. Robm 1959

    Robm 1959 Member

    Location:
    West Sussex
    Talking of which, anyone else have an abundance of what looked like miniature crane flies as the went through their wheat in the evenings ?
     
  10. That photo could have been taken here this evening.
     
  11. Clive

    Clive Staff Member

    Location:
    Lichfield
    Less is more

    I won’t be having any issues with OBM I’m sure
     
  12. Banana Bar

    Banana Bar Member

    Location:
    Bury St Edmunds
    I think it’s best not to look until it’s too late.
     
    Andrew K, Barleymow, Zippy768 and 3 others like this.
  13. Clive

    Clive Staff Member

    Location:
    Lichfield
    I think it’s pretty pointless looking even

    Bugger all you can do unless you have 1 sprayer / 200ac etc
     
    Hindsight likes this.
  14. Sonoftheheir

    Sonoftheheir Member

    Location:
    West Suffolk
    I’ve never heard of these midges till last year, we were too late with the spray. They did have a significant affect in the quality of the grain. Made a lot of tail wheat imo.
     
  15. Brisel

    Brisel Member

    Location:
    Dorset
    2004 was the last bad year for them. Anyone with a good stock of Dursban saved a lot of milling premiums that year. There's little left on the shelf as a remedy for midge now, only perfectly timed pyrethroids like Hallmark hitting them directly, hence Clive's comment about good spraying capacity.
     
    Sonoftheheir likes this.
  16. ajd132

    ajd132 Member

    Location:
    Suffolk
    We got orange and lemon terribly last year, sprayed some and some. Did nothing.
     
  17. Clive

    Clive Staff Member

    Location:
    Lichfield
    Best thing is to grow resistant varieties

    And encourage beneficials - they have plenty predators, unfortunately not many on a lot of farms where insecticide and pyrethroid use is prolific

    We often make our own bed as farmers !
     
    richard hammond and yellow belly like this.
  18. Brisel

    Brisel Member

    Location:
    Dorset
    Those measures help, but cannot overcome an epidemic of pests like these. With so few workable chemical options available, you're still best off doing both of those (y)
     
    Against_the_grain likes this.
  19. Clive

    Clive Staff Member

    Location:
    Lichfield
    Agree to some extent but why do we get such imbalance in nature ? Could it be because we have seriously upset that balance ?

    We need to start asking bigger questions than just which bag or bottle we should reach for
     
    Widgetone and martian like this.
  20. Brisel

    Brisel Member

    Location:
    Dorset
    Few bags & bottles used in Africa, yet they still get plagues of locusts. Do your best and spread your risk with a good rotation then you won't be exposed to one serious event.
     
    Against_the_grain, Flat 10 and B'o'B like this.

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