Message Board - Pests, Weeds and Diseases: chafer grubs.
12 Nov 2009 by Martin Wythe
I have a large area of school playing field that is infested with
chafer grubs. there appears to be limited methods of treatment
so far chemical and parasite control both of which need irrigation.
Does anyone know whether Diatomaceous earth would work?
I know it kills a variety of parasites(mites fleas etc.) in different
applications.
13 Nov 2009 by glenkeeran
is it not very late for chafer grubs?, to me this time of year leatherjackets might be your problem.... ballad at 1.5lts/hec will solve your problem.
Brian
everything happens for a reason
13 Nov 2009 by Martin Wythe
They are definately chafers! (White comma shaped gubs with Brown head.). as you say a little late but the crows are still searching them out and ripping up the turf! My enquiry is really preparing for the onslought next spring!This has been a problem all of last summer I have only recently been asked to have a look at the problem.
13 Nov 2009 by glenkeeran
hi martin
imidacloprid, is the active ingredient which kills chafers, just ask your local supplier which product would be best for you.
Brian
everything happens for a reason
13 Nov 2009 by chrismitchell
Chafers can live for up to 5 seasons before turning into adult beetles. So chafers can be in the soil at any time of the year. Treatment time is spring and it only kills grubs that are less than a year old. It is also very expensive.
Chris
You will never see a statue in honour of a committee.
13 Nov 2009 by davtar01
Hi Martin,
speak to Bayer and although they have little experience in ACTUALLY treating them...they will say they need to be treated when you see bird activity. This means the young grubs are at the surface...hence the bird activity.
Because they have approx a 3 year life cycle you will then need to re-apply over at least a 3-4 year period, in order to break their cycle....and alter the timing of each application every year.
Merit turf is the only product and requires a special applicator of which some companies have. Its a very small appl. rate and so cannot be put on with normal conventional spreaders.
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