[NAFEX] controlling brown rot in stone fruit

Bill Russell shaman at pennswoods.net
Sat Feb 7 19:26:25 EST 2009

Copper is not considered organic by many, but it is not a heavy metal.

  ----- Original Message ----- 
  From: eric 
  To: nafex at lists.ibiblio.org 
  Sent: Saturday, February 07, 2009 10:19 AM
  Subject: [NAFEX] controlling brown rot in stone fruit

   FOlks, using any pesticide under the minimum label rate is not only illegal, but vastly hastens the development of resistance in the organisum you are trying to control. This is true for both organic and convential chemicals, The manufacturers of the pesticide normally use the lowest effective rate as the minimum labeled rate. 

  We use Orbit, Pristine, Bravo (can only be used before shuck split but controls blackknot and peach leaf curl as well) which are very effective reduced risk chemicals to control brown rot in stone fruit.

  TO calculate the amount of chemical to use, look at the label for gallons needed per acre (normally ~100 gallons)  and how much chemical per 100 gal and divide by how many gallons you are making. For example if the lable calls for 1 pt per 100 gallons, and you are making 25 gallons, use 4oz of chemical. If you are using dry chemicals you have to wieght them using a scale (small postal scales are cheap).

  I do not understand why Copper is considered "organic" or "sustainable". Using copper is adding poisonous heavy metals to your soil, and while even the worst of the chemical pesticides will break down over time, Copper is forever.


  ,alandhaigh at gmail.com 
  Mon Jan 19 07:06:32 EST 2009 

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Indar is much more affective than Captan for the control of blossum blight
and brown rot.  Here in humid southeastern NY, once I have the pathogen
under control I can often control BR with a single application of Indar a
month before the first peaches ripen.  With plums a seperate application may
be necessary a month before the particular variety ripens.  In very wet
seasons an extra application or 2 may be necessary, but I never have to
spray within a month of harvest anything besides cherries.

I am interested in the efficacy of Pristine.  Has anyone out there tried
reduced applications of that substance to control BR in their orchards?
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