RE: streaks on dark colors: daylilies

At 11:09 AM 8/9/2002 -0700, you wrote:

Claire,
When I was an African Violet grower, a classic symptom of Thrips was the
appearance of yellow pollen on the flower petals.  This was presumably
because the Thrips were eating the pollen sacs.  I never could see the
little varmints either!
Hard to see and control and when you do see the damage, it's too late to control thrips. Preventative work is the only sure way to control this pest.

I do note that water damage on garden plants is something I've never seen in 25 years in the industry. I *hear* a lot about it but I've never seen it. It may be because the refractory angles on water droplets are not right for concentrating sunlight (the old tale about water "burning" leaves through drops is exactly that - an tale) and it may be because many people blame water when other causes such as thrips are harder to spot. Even cold water was not a problem that caused leaf spotting in the nursery (slower growth or germination to be sure results from cold water) even though there's lots of anecdotal stories that tell you to avoid using cold water on hot days. We used to blast it out - even onto tender seedlings - without damaging the leaves of garden perennials.

Now - pests, improper fertilization mixing, improper acid mixing, chemical sprays, fungus and bacteria have all created their share of leaf spotting at various plants and times. But not water in my experience.

Doug



 On Gladiolus, Thrips make a rather unsightly streak on the leaves, but I
don't recall seeing damage on the flowers.
 When I was in hort school, we monitored for Western Thrips using blue
sticky cards hanging over the GH benches.  One could barely discern there
were black dots on the blue card if the Thrips count was high enough to
treat the crop.  Scouting for insects takes really good eyes and a strong
loupe!
Marilyn Dube'
Natural Designs Nursery
Portland, Oregon


-----Original Message-----
From:   owner-perennials@hort.net [o*@hort.net] On Behalf
Of ECPep@aol.com
Sent:   Friday, August 09, 2002 9:02 AM
To:     perennials@hort.net
Subject:        streaks on dark colors: daylilies

In a message dated 8/9/02 8:58:37 AM Eastern Daylight Time,
cherylisaak@adelphia.net writes:

<< >      Has anyone grown the daylily 'Nordic Night'?  It is a dark purple
and
 >blooms early.  It also got the white streaks on the flower petals in my
 >garden.

 this happens often with the dark red and purple daylilies - moisture
 (dew, rain, watering) or temperature changes the night before opening
 are the usual culprits according to the daylily pundits.  I have only
 seen it when the temps are really high. >>

I have no idea what the real reason is either, but I have also seen this and
it does not happen to a plant every year.   Some years the flowers will be
free of the streaks.  When I was an active member our resident know-all said
it was thrips.  Swore it was thrips.  I never saw a thrip but then I did not
use a glass and go out there at dawn.

Claire Peplowski
NYS z4

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Doug Green,
Freelance writer - "You need it - I write it."
Syndicated columnist, Contributing Writer, Book author, Business writing
http://www.simplegiftsfarm.com/clips/clipmaster.htm

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