I posted a photo of the problem I'm having with some of my rose bushes at
http://photofan.multiply.com/photos/photo/13/1.jpg

It's going to be a couple of days before I can get a sample over to my local
nursery so I thought I'd ask here first.

Does anyone know what the problem might be? Do I need to treat it with
something?

The other day I noticed some tiny white specs on some of the leaves and
buds. I had a rose insecticide spray handy that I'd had for quite some time,
so I shook it up and used it to spray the bushes. Could old insecticide have
caused this? Could spraying in too hot Florida weather have caused this?

I spray regularly with fungicide and it doesn't look like black spot.

Thanks in advance for your help

Renee

Probably powdery mildew, from my superficial glance at it. It's a common
problem with roses, particularly in the spring and fall when night
temperatures are low and humidity is fairly high. Some varieties are more
susceptible than others. It rarely kills the rose bush. Sometimes they will
lose the affected leaves and grow others. In any case, with the arrival of
summer and warmer nights, the problem should disappear.
"Renee" wrote in message
...
I posted a photo of the problem I'm having with some of my rose bushes at
http://photofan.multiply.com/photos/photo/13/1.jpg

It's going to be a couple of days before I can get a sample over to my
local nursery so I thought I'd ask here first.

Does anyone know what the problem might be? Do I need to treat it with
something?

The other day I noticed some tiny white specs on some of the leaves and
buds. I had a rose insecticide spray handy that I'd had for quite some
time, so I shook it up and used it to spray the bushes. Could old
insecticide have caused this? Could spraying in too hot Florida weather
have caused this?

I spray regularly with fungicide and it doesn't look like black spot.

Thanks in advance for your help

Renee

"Renee" wrote in message
...
I posted a photo of the problem I'm having with some of my rose bushes at
http://photofan.multiply.com/photos/photo/13/1.jpg

It's going to be a couple of days before I can get a sample over to my
local nursery so I thought I'd ask here first.

Does anyone know what the problem might be? Do I need to treat it with
something?

The other day I noticed some tiny white specs on some of the leaves and
buds. I had a rose insecticide spray handy that I'd had for quite some
time, so I shook it up and used it to spray the bushes. Could old
insecticide have caused this? Could spraying in too hot Florida weather
have caused this?

I spray regularly with fungicide and it doesn't look like black spot.

Thanks in advance for your help

Renee


Spray burn. It's probably from the old insecticide. Any sprays that you
use should be freshly mixed, and mix only the amount you can use in one
spraying. Roses should be well watered before spraying, and you should
spray only in the early morning hours when it's as cool as it's going to be.
Sprays that use oil derivatives (some insecticides and some fungicides)
should not be sprayed when temps are going to be above 86°.

"Renee" wrote in message
...
I posted a photo of the problem I'm having with some of my rose bushes at
http://photofan.multiply.com/photos/photo/13/1.jpg

It's going to be a couple of days before I can get a sample over to my
local nursery so I thought I'd ask here first.

Does anyone know what the problem might be? Do I need to treat it with
something?

The other day I noticed some tiny white specs on some of the leaves and
buds. I had a rose insecticide spray handy that I'd had for quite some
time, so I shook it up and used it to spray the bushes. Could old
insecticide have caused this? Could spraying in too hot Florida weather
have caused this?

I spray regularly with fungicide and it doesn't look like black spot.

Thanks in advance for your help

Renee

Thanks everyone for your replies. I should have retaken the photo in
daylight because the white stuff you saw on the leaf, Presley, was actually
the reflection from my camera flash. I feel silly for having missed that! It
was actually the brown spot that I was concerned about.

I made it to the nursery and someone looked at some samples, and though she
didn't say definitively, she thought it might be burn like you did,
Sunflower. I did not spray in the early morning as you suggest. Also, she
told me that watering roses in the heat of the day could stress them, too. I
wasn't aware of that -- if it's true(?).

I picked up some fresh spray -- Triple Action plus RTU by Fertilome -- an
insecticide, miticide, and fungicide in one. It's premixed in a spray
bottle. I like being able to just pull it out the cabinet in the morning and
be ready to go with no fuss. I plan on using that only periodically when I
see insects, and alternating that with my weekly copper fungicide spraying
if it's necessary to use it. It's still early and cool enough right now so
I'm on my way out to try the new spray and will closely watch how my roses
react to it in the coming days.

Thanks again.

Renee

"Renee" wrote in message
. ..
"Renee" wrote in message
...
I posted a photo of the problem I'm having with some of my rose bushes at
http://photofan.multiply.com/photos/photo/13/1.jpg

It's going to be a couple of days before I can get a sample over to my
local nursery so I thought I'd ask here first.

Does anyone know what the problem might be? Do I need to treat it with
something?

The other day I noticed some tiny white specs on some of the leaves and
buds. I had a rose insecticide spray handy that I'd had for quite some
time, so I shook it up and used it to spray the bushes. Could old
insecticide have caused this? Could spraying in too hot Florida weather
have caused this?

I spray regularly with fungicide and it doesn't look like black spot.

Thanks in advance for your help

Renee

Thanks everyone for your replies. I should have retaken the photo in
daylight because the white stuff you saw on the leaf, Presley, was
actually the reflection from my camera flash. I feel silly for having
missed that! It was actually the brown spot that I was concerned about.

I made it to the nursery and someone looked at some samples, and though
she didn't say definitively, she thought it might be burn like you did,
Sunflower. I did not spray in the early morning as you suggest. Also, she
told me that watering roses in the heat of the day could stress them, too.
I wasn't aware of that -- if it's true(?).

I picked up some fresh spray -- Triple Action plus RTU by Fertilome -- an
insecticide, miticide, and fungicide in one. It's premixed in a spray
bottle. I like being able to just pull it out the cabinet in the morning
and be ready to go with no fuss. I plan on using that only periodically
when I see insects, and alternating that with my weekly copper fungicide
spraying if it's necessary to use it. It's still early and cool enough
right now so I'm on my way out to try the new spray and will closely watch
how my roses react to it in the coming days.

Thanks again.

Renee

Copper sprays often burn roses and are not really recommended beyond a
narrow temperature range. Fungicides, to be effective, must be applied as a
*preventative* on a regular schedule. That schedule is printed on the
bottle, as is the diltution rate. Using an all in one is overkill and
ineffective. I've yet to see any all in one that does any of the components
at all well. If you keep using the regimen you've outlines, you're going to
fry all of your foliage and end up with a huge spider mite infestation.

"Sunflower" wrote in message
...

"Renee" wrote in message
. ..


I picked up some fresh spray -- Triple Action plus RTU by Fertilome -- an
insecticide, miticide, and fungicide in one. It's premixed in a spray
bottle. I like being able to just pull it out the cabinet in the morning
and be ready to go with no fuss. I plan on using that only periodically
when I see insects, and alternating that with my weekly copper fungicide
spraying if it's necessary to use it. It's still early and cool enough
right now so I'm on my way out to try the new spray and will closely
watch how my roses react to it in the coming days.

Thanks again.

Renee

Copper sprays often burn roses and are not really recommended beyond a
narrow temperature range. Fungicides, to be effective, must be applied as
a *preventative* on a regular schedule. That schedule is printed on the
bottle, as is the diltution rate. Using an all in one is overkill and
ineffective. I've yet to see any all in one that does any of the
components at all well. If you keep using the regimen you've outlines,
you're going to fry all of your foliage and end up with a huge spider mite
infestation.


The nurseries and horticulturists in my area of Florida recommend weekly
copper fungicide spraying on all roses except the carefree and
low-maintenance ones. Blackspot quickly gets out of control here because of
the rain and humidity. I spray regularly with copper fungicide usually in
the morning or early evening when the air is still, as recommended by the
bottle's directions. So far I haven't noticed any burn problems after using
the fungicide.

I plan on stopping my weekly fungicide spray whenever I use the all-in-one.
I don't see how that is overkill since the two sprays are not applied during
the same week. The all-in-one spray bottle says it's a miticide -- isn't
that for spider mites? So I'm surprised you mention that I'll wind up with a
huge spider mite infestation if I use it.

I'd like to here your suggestions as to what and why a different regiment
would be better. Thanks in advance.

Renee

"Renee" wrote in message
...



I'd like to here your suggestions

here = hear

my English is slipping these days

:-)