[nafex] Re: bags for bugs

Kelleher at gj.net Kelleher at gj.net
Sat May 5 22:10:20 EDT 2001


I bagged the pears at about dime size, while I was thinning.  Around 
here that is usually before first moth flight but depending on 
weather it can be concurrent.  I just don't like to be thinning 
freshly sprayed fruit.  Fruit that is damaged by the first moth 
flight doesn't seem to make it to maturity, it goes bad and falls off 
well before late August when they ripen.  It is certainly possible 
that most of the damage was done by bugs crawling in through the top 
as it is difficult to get a tight seal.  The majority of the bags did 
not have a hole chewed through it.  The holes were circular and less 
than a 1/16-inch diameter. Maybe it was mature moths chewing out?  I 
still have the bags but I haven't reapplied them.  Much as I hate the 
every two week spray schedule it seems to be the only way to keep the 
fruit.
--- In nafex at y..., "dwalsh/wchase" <wchase at i...> wrote:
> I used Taiyo bags (green inside bag) a few years ago to improve 
colour in
> Jonagolds.  They definitely improved the colour, they were labour-
intensive, and
> it was difficult to tie the bags so bugs could not get in via the 
hole at stem
> end.
> 
> Was the damage to the bagged apples done by codling moth?
> When did you bag the pears?   Before codling moths were flying?
> 
> I found that bald-faced hornets did take a thin layer off the paper 
bag for their
> nests, and earwigs did get in through the hole at the stem end, but 
nothing chewed
> a hole in the bag - does anyone have any idea of what pest would be 
chewing holes
> at the end of the season?        I suppose the codling moth could 
try to chew
> their way out of the bag, but I wouldn't think they'd bother, or 
have the brains,
> to chew their way in.
> 
> One good side effect of the bags was that I had no hail damage 
while conventional
> growers lost most of their apple crop.
> 
> Derry
> 
> Derry Walsh & Bill Chase  email:wchase at i...
> Aldergrove,  B. C.,  Canada
> phone/fax (604) 856-9316
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> Home web page  http://www.interchange.ubc.ca/wchase/HTML
> ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
> ----- Original Message -----
> From: <Kelleher at g...>
> 
> 
> : Three years ago I tested the two layer apple bags (grey outside, 
red
> : inside) on my asian pear tree (we have about 90% plus percent 
codling
> : moth damage if we don't spray).  I found with the bags I still got
> : 70% damage.  They just chewed little holes through the bags 
towards
> : the end of the season.  The fruit was not as badly damaged early 
in
> : the season though, so it was easy to just cut out a bad spot or 
the
> : core.  It is a really labor intensive effort.  It might work if 
the
> : bags were pretreated with an insecticide, but otherwise I wouldn't
> : recommend it if coddling moths are a problem in your area.


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