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nafex - Re: [nafex] Azera insecticide and pears

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  • From: Anton Callaway <marillen@earthlink.net>
  • To: mailing list at ibiblio - Northamerican Allied Fruit Experimenters <nafex@lists.ibiblio.org>
  • Subject: Re: [nafex] Azera insecticide and pears
  • Date: Sun, 19 Apr 2015 09:30:17 -0400 (GMT-04:00)

I will do so, Rivka. I took some time to document the damage yesterday.

The promised list of pears:
Severely affected (100% leaf death):
Blake's Pride
Potomac
Chapin
US-Michigan 437
Dana Hovey
Maxine
Several Potomac seedlings

Completely resistant:
Belle Angevine
Beurre Superfin
Carrick
Eldorado
Hoskins
Immamura Aki
Koyama
Lucy Duke
Meadows
Meigetsu
Mericourt
Miss Label
Morgan
Old Home X Farmingdale 51
Pyrus calleryana
Spalding
Tenn
Tsu Li
unnamed local pear imported from China in the 1800's
Waite
Warren


Intermediate susceptibility:
Ayers (probably fully susceptible and some of the trees didn't get full
coverage)

Anton
Zone 8; North Carolina Piedmont


-----Original Message-----
>From: Road's End Farm <organic87@frontiernet.net>
>Sent: Apr 18, 2015 1:15 PM
>To: Anton Callaway <marillen@earthlink.net>, mailing list at ibiblio -
>Northamerican Allied Fruit Experimenters <nafex@lists.ibiblio.org>
>Subject: Re: [nafex] Azera insecticide and pears
>
>Anton,
>
>Maybe you've already done this, but if not: I'd immediately contact both
>your local Extension office (and any state agency they refer you to) and the
>manufacturer of the Azera. I would also take samples, and try to get
>Extension to do so also. I don't know whether the material sold to you may
>have been contaminated with something.
>
>Good luck,
>
>
>
>-- Rivka; Finger Lakes NY, Zone 6A now I think
>Fresh-market organic produce, small scale
>
>
>On Apr 18, 2015, at 12:50 PM, Anton Callaway wrote:
>
>> Dear fellow pear growers,
>>
>> I just wanted to warn other readers on this group about Azera insecticide
>> from MGK. It is an OMRI-approved insecticide that's basically a mixture
>> of azadirachtin (the main active ingredient in neem oil) & pyrethrins. I
>> sprayed a mixture of Azera and Serenade at the recommended rates on my
>> orchard on Sunday and by Tuesday, several cultivars of pear with European
>> heritage (P. communis) were completely black. The damage is not
>> fireblight. The symptoms are quite different and it is hitting certain
>> blight-resistant cultivars while blight-susceptible cultivars right next
>> to them are unaffected. I will compile a complete list this weekend, but
>> I wanted to send a note quickly so that others can avoid the damage that I
>> experienced.
>>
>> I think the trees will survive, but I'll get no fruit from them.
>>
>> I've been orcharding in the Southeastern U.S. since 1979 and have never
>> seen anything like it. I've sprayed this same orchard with neem oil and
>> pyrethrins (separately) and neem oil & Serenade together for several years
>> in the past with no ill effects. Other species were not affected at all.
>> I have one tree with 6 cultivars grafted in it. One pure communis
>> cultivar has all of its leaves killed and another communis X pyrifolia
>> cultivar has slight damage while the other 4, including one pure pyrifolia
>> ('Koyama') are completely fine.
>>
>> 'Potomac' and 'Blake's Pride' are severely affected.
>>
>> Anton
>> Zone 8; The North Carolina Piedmont
>>
>






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