What eats flea beetles

Flea beetle must have a predater.

What eats them?

I have some swedes & the best ones under net just getting 4 true leaves but taking some damage from the flea beetles, I'm reluntant to treat because cabbage root fly is the bigger problem & ground beetles eat the rootfly eggs.
 

Kidds

Member
Horticulture
I don't know of any predators of flea beetle. They would have to be bigger than flea beetle as that is the general rule of predation, and there would have to be an awful lot of them to control any significant number. As the population curve of predators has to lag behind the prey curve there would be an awful lot of damage before predator numbers caught up.
A parasite, virus or disease would be a better hope. Do you think Bacillus thurungiensis has any role to play or do the flea beetle just come in from too wide an area?
I rely on predators controlling a range of pests in my orchards, I would never ever even consider using pyrethroids in there no matter what. They do more harm than good.

Are your nets not working then? Or are they not fine enough? I am using fine nets that are supposed to keep flea beetle out but it is my first time using and only on large garden scale.
 
I don't know of any predators of flea beetle. They would have to be bigger than flea beetle as that is the general rule of predation, and there would have to be an awful lot of them to control any significant number. As the population curve of predators has to lag behind the prey curve there would be an awful lot of damage before predator numbers caught up.
A parasite, virus or disease would be a better hope. Do you think Bacillus thurungiensis has any role to play or do the flea beetle just come in from too wide an area?
I rely on predators controlling a range of pests in my orchards, I would never ever even consider using pyrethroids in there no matter what. They do more harm than good.

Are your nets not working then? Or are they not fine enough? I am using fine nets that are supposed to keep flea beetle out but it is my first time using and only on large garden scale.
Short staffed, main helper having cancer treatment.

So putting nets on was too slow. But flea beetles can slowly get through.
 
So can ground beetles eat flea beetles? Saw quite a few lady birds today.

Crop still holding its own. I also grow transplanted leaf veg which has been drenched with verimark only netted if we can't keep rabbits & pigeons off. We drill swedes in the tramlines & just use them for stockfeed. Sown some recently into perfect conditions & had perfect emergence, three days later flea beetle had the lot.
 

Bogweevil

Member
Ground beetles or carabids are amongst the most abundant invertebrate predators in fields of oilseed rape in Europe. The immature stages of the six major pests of oilseed rape i.e., cabbage stem flea beetle, pollen beetle, cabbage seed weevil, cabbage stem weevil, rape stem weevil and brassica pod midge, are vulnerable to predation by carabids when they are in or on the soil from mid-September to mid-July. About 42 species of carabid are common in rape fields.

https://www.researchgate.net/public...nce_Spatio-Temporal_Distributions_and_Feeding

Parasitic wasps have a go:


xxx-jic-parasitic-wasp.jpg



Bats. Most TFF users are bats so it is surprising so many struggle with flea beetles.
 

juke

Member
BASE UK Member
Location
DURHAM
Parasitic wasps are csfb predator, you need something in there to attract them.
Other option cover the plants in diatemaceous earth.
 

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HSENI names new farm safety champions

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Written by William Kellett from Agriland

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The Health and Safety Executive for Northern Ireland (HSENI) alongside the Farm Safety Partnership (FSP), has named new farm safety champions and commended the outstanding work on farm safety that has been carried out in the farming community in the last 20 years.

Two of these champions are Malcom Downey, retired principal inspector for the Agri/Food team in HSENI and Harry Sinclair, current chair of the Farm Safety Partnership and former president of the Ulster Farmers’ Union (UFU).

Improving farm safety is the key aim of HSENI’s and the FSP’s work and...
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