TopVeg – growing veg,fruit&herbs

August 2, 2010

Hoverflies control blackfly on runner beans

Filed under: pests&diseases — Tags: , , , , , — TopVeg @ 8:42 pm

Our runner beans are surrounded by hoverflies, and their larvae will eat & so control the blackfly on the runner beans.

hoverfly

hoverfly

The hoverflies mimick wasps by having the same colouring, so they are left alone and avoided by other animals!

The following photo shows a hoverfly on a runner bean flower – it is on the top left of the photo. 

hoverfly-&-blackfly

hoverfly-&-blackfly

 Unfortunately it is much easier to see the blackflyon the runner bean plants!

There is always a time lag whilst the  controlling insects build up their numbers, & the pest increases.  Hopefully the hoverflies will soon have the blackfly on the runner beans under control!

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2 Comments

  1. i live in east essex, our runner beans suffered blackfly earlier in the year, which we controled with soaps water. in the last week they are back with all of our neighbours as well. today 03.08.2010 swarms of midges are flooding through our gardens thousands are at the beans doing there jobs, also large amounts of ladybirds are joings them, they are still swarming across the garden its been over 3 hours.

    Comment by dennis morgan — August 3, 2010 @ 7:54 am

  2. Hello Dennis

    Good to hear you have lots of ladybirds protecting your beans! How wonderful to witness the swarms of insects- our gardens bring us so much!

    How often did you have to treat the blackfly with soapy water?

    Thanks for visiting TopVeg.com & for your comment

    TopVeg

    Comment by TopVeg — August 3, 2010 @ 8:20 am

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