North American Fruit Explorers mailing list at ibiblio

["Stephen Sadler" <Docshiva@Docshiva.org>]

Bonide lime sulfur is a dormant oil with calcium sulfide.  It can control
peach twig borer, applied as directed as a dormant oil once in late fall and
once before bud swell in the spring.  Peach twig borer is a different
creature than peach borer, and they are controlled differently - although a
healthy plant may be less susceptible to either.  If you have peach borer,
you could spray the trunks weekly during moth activity (for most areas, July
and August) with Bacillus thurengiensis, Bt.  You can also, or instead,
drench the trunks with parasitic nematodes, S. carpocapsae, in spring or
fall.  If you're not committed to organic controls, you can paint the trunks
with white latex paint, providing a barrier to borer entry.  

~ Stephen

-----Original Message-----
From: nafex-bounces@lists.ibiblio.org
[mailto:nafex-bounces@lists.ibiblio.org] On Behalf Of Steve
Sent: Wednesday, June 04, 2008 8:41 PM
To: North American Fruit Explorers
Subject: Re: [NAFEX] organic-ish pest control in plums and peaches

Steven Moize wrote:
> Hi all,
>
> I have a question about using Bonide lime-sulfur spray on my plums for
borers.  I assume they are borers.  There are tiny (1cm) larva at the pit,
bored in from the outside.
>
> Any info on this product?  Any suggestions?
>
> Steve 
>   
Borers bore into the bark and wood of fruit trees.
Do your larva look about like this?
http://tinyurl.com/4ohjlf     (click where it says "click here" to see 
the picture)
Do they leave scars on the fruit that start out looking like this?
http://www.uvm.edu/~organica/OrganicOrchardInformation/OrganicIPM/checklisti
mages/arthropods/PC/DSC_0009.jpg
Isn't lime-sulfur used as a fungicide? You need an insecticide to 
control insects, not a fungicide.
Plum curculios lay eggs in plums (and other fruit) in the spring right 
after the flowers have finished and the little fruits start forming.
If you already have the larva in your fruit, it's too late for the year. 
Be ready for them next year.
If only a small portion of your plums have been infested, pick off all 
the ones with the scars on them and send them far away (trash) or drop 
them into a bucket of water and leave them in there until you are sure 
the larva are dead.

Steve (the other one.... in the Adirondacks)

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