[NAFEX] A plague of locusts!

Karen Tillou arboretum at homeorchardsociety.org
Thu May 15 14:43:12 EDT 2008


out of curiosity, does anyone have photos of the cicada damage to  
twigs and branches you're all talking about?  we don't get 'em here,  
but i'm curious about the effect they have...
karen

oregon city, OR - zone 8a and wet




On May 15, 2008, at 11:09 AM, Lucky Pittman wrote:

> I can show you significant 'scars' on fruit trees that were 2-3 yr
> old, back in '96 or '98, the last time we had a major emergence.
>
> At 12:45 PM 5/15/2008, you wrote:
>> In late summer, well after it's all over, pay special attention to
>> the trees along the sides of the road.  If you drive down an
>> interstate through a wooded area, you''ll be amazed at the damage to
>> the trees (especially oaks if my memory serves).  When the eggs are
>> laid in smaller branches, the branch often dies back to the point
>> where the eggs were laid.  In heavily damaged areas the trees are
>> carpeted with brown patches from dead branches.  Not a huge issue for
>> a mature oak; a potentially serious threat to a young fruit tree.
>>
>> I've got a lot of trees with scars from the previous mini-cycles, as
>> well as the last big one from 17 years ago.  I'm not looking forward
>> to the effects on all the apples and pears I planted in the last 2
>> years (although I do enjoy the sound they make).
>>
>> Tom A.
>>
>>
>> At 09:31 AM 5/15/2008, you wrote:
>>> Uh, Ginda, I think you didn't have fruit trees when the cicadas  
>>> came out
>>> that time.  Their ovipositors do severe damage to twigs, which in  
>>> young
>>> trees means the future main branches.  And whenever and wherever a  
>>> pear tree
>>> is damaged, you increase the possibility of blight entering the  
>>> wounds.  I'm
>>> very, very serious about how much my young trees can be hurt if I  
>>> don't do
>>> as much as I can to protect them.  And "17 year locusts" is a  
>>> commonly used
>>> term, though it is not technically correct.  I read an article  
>>> years ago
>>> about the 17 year cicadas, the author talked about all the twigs  
>>> that fell
>>> off from the damage and how he thought the trees looked greener  
>>> the next
>>> year, he thought it was sort of like they'd been pruned.  I wonder  
>>> if it's
>>> because they were now stuck with only little bitty larvae chewing  
>>> on their
>>> roots instead of big ones.  About 5 years ago someone told me some  
>>> of her
>>> trees were looking bad when they first leafed out, and then the  
>>> cicadas
>>> emerged, so she thought they'd really been doing a job on the  
>>> roots.  We
>>> kind of forget what's going on down there sometimes.      Donna
>>>
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