There is a chemical called Imidan in it's 5% formulation that is very
effective against Codling Moths. It used to be sold here in the States
at Garden stores, but now the government deemed it hazardous for home
orchard use. Farmers can still buy the stuff, so if you know one, you
can get some from them. It is strong stuff, so you need to take all the
necessary precautions like proper clothing and breathing mask. I can
expect the 'organics' to blast me on this one, but I have tried organics
like Rotenone, and none of them work. I don't know if it is sold in
England. Check the internet and you may hook up with a supplier.
Midwest Fruit Explorers (MidFEx)
Alistair Macdonald wrote:
I have an uncle who swears by nematode worms. There are several places
(two are Home Depot and Gardens Alive
http://www.gardensalive.com/item_display.asp?ProductNumberP00 ) here in the
US that sell them. The procedure is to spray the ground under your apples
trees - and the main trunk - with them as soon as it gets warm in spring,
with periodic followups during the season. The idea, according to him, is
to attack the insect in the pupae stage. I'm going to give this a try
starting a few weeks from now while it is still warm and the insects are
getting settled for the winter.
Another approach is to heavily dormant spray the trees several times during
the winter to kill as many of the overwintering pupae as possible. An oil
based spray will work well by suffocating the pupae. Not 100% effective
(you miss some), but it does keep the overall poplulation down.
hmm...let's see. A couple of points here....
The only trees with which I am familiar that has foliage or fruit in winter
are evergreens - and foliage only at that. Best to my experience, coddling
moths are not a problem with conifers. And I do believe that it is winter
that my previous post recommended when dormant spraying be done.
The pupae on the one hand are living entities that require air. On the
other hand best to my knowledge, they do not have an independent air supply
system such that they can be smothered by various means, including dormant
oil. The trick, of course, is to cover the cocoons sufficiently with oil
that the pupae inside do suffocate. You don't want to or don't need to
cover the pupae itself with the oil...you just want to cut off the air
I think you missed the whole point. Dormant oil is effective in
eggs, not cocoons. The eggs of the Codling Moth are laid a few days
petal drop, in the Spring. It's bad enough that you are wasting your
time and resources on this approach. Don't mislead others to do the
If you look on the web for control measures of Codling Moths, most of
don't even mention dormant oil, and the few that do, say it is only
effective and should be sprayed on the eggs (not the cocoons). As a
reference, take a look at this article:
In the cocoons, the insects are essentially dormant and probably don't
a lot of air.
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