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Re: Heritage River Birch Pests


Could the birch be stressed? While B. nigra is more heat tolerant  
than others, did you have unusually hot, or dry summers the past  
couple years? Pests and diseases seem to have a sixth sense for  
compromised hosts.


Cathy, west central IL, z5b

On Jul 6, 2005, at 6:08 PM, Daryl wrote:

> No on the hort oil.  I found this interesting bit on the web
> http://entweb.clemson.edu/cuentres/eiis/pdfs/TO17.PDF   I didn't  
> know that
> aphids ever had and alternate host.
>
> Once the plant matures a bit, the problem seems to go away, at  
> least it did
> for me. I'm sure it helped that I encouraged the good guys  
> (ladybugs and
> such)
>
>
> d
>
>
> ----- Original Message -----
> From: "A A HODGES" <hodgesaa@earthlink.net>
> To: <gardenchat@hort.net>
> Sent: Tuesday, July 05, 2005 7:55 PM
> Subject: Re: [CHAT] Heritage River Birch Pests
>
>
>
>> Yes, I've seen several on the tree. I always thought they looked  
>> like tiny
>> alligators, except the color. I had these things last year too.  
>> Should I
>> attempt to spray this winter you think?
>>
>>
>> Andrea H
>> Beaufort, SC
>>
>>
>>
>>> [Original Message]
>>> From: Daryl <pulis@mindspring.com>
>>> To: <gardenchat@hort.net>
>>> Date: 7/5/2005 8:06:12 AM
>>> Subject: Re: [CHAT] Heritage River Birch Pests
>>>
>>> Some stages of Aphids have wings, and Aphids and sawflies seem to  
>>> be the
>>> major pests of birches around here, along with a few weeks of  
>>> Japanese
>>> Beetles.  In most cases, the infestations are self-limiting.
>>>
>>> Do you know what baby ladybugs look like? If you've got ladybugs,
>>>
> they'll
>
>>> probably take care of the aphids for you.
>>>
>>> d
>>>
>>>
>>> ----- Original Message -----
>>> From: "A A HODGES" <hodgesaa@earthlink.net>
>>> To: "gardenchat" <gardenchat@hort.net>
>>> Sent: Monday, July 04, 2005 6:34 PM
>>> Subject: [CHAT] Heritage River Birch Pests
>>>
>>>
>>>
>>>> Anyone ever had a problem with pests on a River Birch? This is  
>>>> Betula
>>>> Nigra 'Heritage.' This year, and last I had major problems with  
>>>> what
>>>> something that has wings, is tiny and is a piercing, sucking  
>>>> insect.
>>>> Truthfully, they look like aphids with wings to me. I've tried
>>>>
> blasting
>
>>>> them, and the tree also has quite a few ladybugs, but they are  
>>>> really
>>>>
> a
>
>>>> serious problem. My tree probably has half the leaves it should.
>>>>
>>>>
>>>> There also seem to be some kind of beetles that look like a  
>>>> vegetable
>>>>
>>> pest, maybe potato or cucumber beetles.
>>>
>>>>
>>>> What do I do? The tree was planted at the back of the house in a  
>>>> very
>>>> wet area, near where I do my repotting, etc. It's about 15 feet  
>>>> tall
>>>> now, and is growing rapidly, but probably not a rapidly as it  
>>>> should.
>>>>
> I
>
>>>> planted it to create summer shade which is desperately needed at  
>>>> the
>>>> back.
>>>>
>>>>
>>>> Should I wait until this winter and then get on a ladder and  
>>>> blast it
>>>> with hort oil? I've never tried to systemically poison a tree  
>>>> before.
>>>>
>>>> Suggestions?
>>>>
>>>>
>>>> Andrea H
>>>> Beaufort, SC
>>>>
>>>
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