Alium Leaf Miner

  • 9 Replies
  • 451 Views
*

AndyRVTR

  • Hero Member
  • *****
  • Location: Jarrow 'oop North'
  • 2313
Alium Leaf Miner
« on: November 10, 2022, 13:49 »
So after this years crop of leeks were decimated by ALM I've done a bit of reading up but I cant find an answer to my question.
The articles I've read say that it usually hits twice a year and pupae are most always found either on leeks/onions or in the soil.  My question is, are any pupae from a second attack likely to remain in the soil over winter and hatch the following year possibly causing a repeat of what's happened this year or will they just die off.

*

Anton

  • Senior Member
  • ****
  • Location: Belgium
  • 570
Re: Alium Leaf Miner
« Reply #1 on: November 10, 2022, 14:47 »
Yes, they are likely to remain in the soil. I spray the leeks a couple times with a Chrysantheum concentrate concoction during the critical  months. Funny thing is,  after being blighted by these pests over the last five years or so they seem to have been keeping a low profile over the last couple of years.

Anton

*

Hampshire Hog

  • Hero Member
  • *****
  • Location: North Hampshire
  • 1126
Re: Alium Leaf Miner
« Reply #2 on: November 10, 2022, 15:18 »
Good info Andy.
I need to clear my leeks once my back stops playing up!
Certainly sounds dangerous to leave them hanging around.
I wonder what effect all this warm weather is having on them too. ??
A bit annoying as I usually thought of leeks as being relatively trouble free.
Cheers HH
Keep digging

*

simon hughes

  • New Member
  • *
  • 12
Re: Alium Leaf Miner
« Reply #3 on: May 25, 2023, 14:26 »
Itís a real pain. My plot it riddled with it. You can cut your leeks at ground level and they will grow back. But they will need extra fine netting in October / Sept. Canít help with onions as mine seem to avoid it.

*

Anton

  • Senior Member
  • ****
  • Location: Belgium
  • 570
Re: Alium Leaf Miner
« Reply #4 on: May 25, 2023, 14:30 »
In which months are the pests the most virulent?

Anton

*

vikingraider

  • Full Member
  • **
  • Location: East Yorkshire
  • 69
Re: Alium Leaf Miner
« Reply #5 on: May 25, 2023, 15:58 »
My onions seem riddled with it too

*

Blewit

  • Experienced Member
  • ***
  • Location: Nottinghamshire
  • 414
Re: Alium Leaf Miner
« Reply #6 on: May 25, 2023, 17:04 »
In which months are the pests the most virulent?

Anton

We've had the ALM since 2014. for us the spring offensive happens around May 1st but unfortunately I've not yet been able to pinpoint the Autumn session. Internet reports say otherwise but we've found the spring flight to be worse than the autumn one. Certainly the first three years were the worst but it never goes away. Even though we now grow alliums under Enviromesh ultra-fine the fly still manages to get through and attack some bulbs.

Re Leeks being trouble free HH, we also get leek moth which I believe spread North as the climate warmed. Leek moth and ALM are supposed to fly at different times but one year our leeks were riddled with ally miner maggots and contained adult leek moths at the same time.

As mentioned above it is possible to watch as the alm grubs track down through the leek and cut it off at ground level just before they get there. The leek will re-grow but it's a gamble as to whether the adult has finished laying her eggs.

Onions, leeks and shallots etc can be completely destroyed by alm, garlic and elephant garlic survive as the grubs only attack the material that will become the paper. Not very nice though to have lots of brown pupae dropping out on the chopping board as you're preparing food to eat  :ohmy:

*

Hampshire Hog

  • Hero Member
  • *****
  • Location: North Hampshire
  • 1126
Re: Alium Leaf Miner
« Reply #7 on: May 26, 2023, 09:09 »
Clearly I had been lucky historically to have no issues with pests on my leeks.
I have solved my problem this year by not growing any but I am waiting to see if my onions /garlic/ shallots remain untroubled.

*

Anton

  • Senior Member
  • ****
  • Location: Belgium
  • 570
Re: Alium Leaf Miner
« Reply #8 on: May 26, 2023, 10:55 »
Thanks Blewitt

Anton

*

Anton

  • Senior Member
  • ****
  • Location: Belgium
  • 570
Re: Alium Leaf Miner
« Reply #9 on: May 26, 2023, 11:03 »
For the first time I grew leeks from seeds last year. They were doing really, really well and then some started showing signs of attack in November (when it was really hot for the last time). I pulled them up. The ones I left (replanted later on thus smaller than the other ones) survived and we eat them this spring.

I have sown under a net this year. Some gardener told me they grew their leeks under netting last year and had no problems at all. But they did not lift the net at all, not even to do any weeding!


Anton



xx
Alium leaf miner

Started by vikingraider on Grow Your Own

2 Replies
127 Views
Last post May 24, 2023, 19:27
by vikingraider
xx
Alium leaf miner

Started by MARROW HEAD on Grow Your Own

1 Replies
1148 Views
Last post March 31, 2008, 20:32
by gobs
xx
Leaf miner again

Started by Beetroot queen on Grow Your Own

8 Replies
3300 Views
Last post August 03, 2009, 08:57
by tode
xx
Allium leaf miner

Started by RJR_38 on Grow Your Own

5 Replies
2947 Views
Last post June 24, 2015, 22:28
by mumofstig
 

Page created in 0.296 seconds with 47 queries.

Powered by SMFPacks Social Login Mod
Powered by SMFPacks SEO Pro Mod |