North American Fruit Explorers mailing list at ibiblio

[<dmnorton@royaloakfarmorchard.com>]

The reason for the "Do not apply after petal fall" on the label is twofold.  It has to do with PHI (Post Harvest Interval) and the fact that permethrin kills off the beneficial insects.  Beneficials are not as prevalent prior to petal fall and therefore permethrin could fit into an IPM program prior to petal fall but not after.  Permithrin is highly toxic and in some states has the  "Do not apply after petal fall" on the label.  There are some 10 different variations of permethrin, each with different labeling and certain restrictions within certain states.   To view the various labels you can go to http://www.cdms.net/LabelsMsds/LMDefault.aspx?t=   the CDMS database is the best source on chemical label information.  You can view each manufacture of a chemical, its label and its MSDS info.  If you let me know what specific insects you are targeting, maybe I can give you an alternative.  Sevin also kills the beneficials at higher rates, but the lower rate used for thinning is not as detrimental to the beneficials.  And Sevin used at the higher rate for insects is at a high enough rate not to cause thinning on the apples and the timing for the sprays after petal fall is usually after the apples are less susceptible to its thinning affects as you have heard.  And now I've got to go sell some peaches

 

Hope this helps!

 

Dennis Norton
Royal Oak Farm Orchard
http://www.royaloakfarmorchard.com
http://www.theorchardkeeper.blogspot.com
http://www.revivalhymn.com

----- Original Message -----

From: Richard MURPHY

To: nafex

Sent: Wednesday, August 01, 2007 12:29 PM

Subject: [NAFEX] Permethrin and Pristines and Corn

Hello Again All;

 

Permethrin does a good job for me on the apple trees.

One note on the label reads, "Do not apply after petal fall".

 

I asked the agent at the Maine County Extension (smart guy, too), and he said that honestly he didn't know.

But, he warned about the fact that it also kills beneficials, which I sort of already knew, so..........

 

Is anybody aware of the "No Permethrin after Petal Fall Rule", and why this is so?

Will all my trees pull up their roots and run down the street?

Do the apples fall off?

 

Somebody says, "Switch to Sevin". Well, Sevin thins apples. But, does this thinning affect go away after the apples reach a certain size? So I've been told.

 

My Pristine Apple trees are starting to fruit, this 3rd year after planting (semi-dwarf) zone 4.

What a beautiful little apple ! Solid yellow with a pink blush. No crud, maybe one bug. Not ripe yet.

 

The corn (side crop) is exploding. If you are thinking about a quick cash crop for the FM until the fruit ripens and it's sweet corn, go with Ambrosia (75 days) or Incredible (85 days). I got people lining up already.

 

Murph