|
You can also get some double stick tape (white
carpet tape works good) and wrap the area around the twig to capture crawlers to
help identify scale. It's not a bad idea to do that anyway for simple
scouting purposes in both peach and apple. Crawlers usually start
appearing right after pink through petal fall on apples and after petal
fall on peaches. Your oil spray should take care of them.
You can download the Pest Phenology
calendars at http://extension.usu.edu/htm/publications/by=category/category=66 for
apples, peaches and apricots, pears and cherries. They show each stage of
the tree at the top with the various major pests/diseases down the left
with their life cycles in the chart. For those who have a difficult
remember ing the tree phenology as well as pest life cycles, the calendar
is a great tool.
----- Original Message -----
Sent: Tuesday, April 08, 2008 12:47
PM
Subject: Re: [NAFEX] help with peach
problem identification
Mark:
Regarding iding for
scale, you should see "eggs" (flat, slightly puffed up) on the
bark.
Since the symptoms didn't show up on
leaves last year, I'd strongly suspect that nutrition is the culprit
Also regardless of what a soil/leaf sample may imply, peaches are heavy users
of N.
Was there sufficient extension
(new) growth last year?
ed
On Tue, Apr 8, 2008 at 1:29 PM, Mark & Helen
Angermayer < hangermayer@isp.com> wrote:
Thanks Dennis and Ed,
The scab pictures on the Kearneysville site
look a lot like my twigs. And I've never sprayed for scab. The
only thing that puzzles me is that I didn't recognize any scab on the leaves
last summer (obviously there was no fruit). The leaves looked normal
and healthy except for some mottling. I sent a leaf sample in for
nutrient analysis and it came back OK in N and P but very low in Mn. I
thought about doing a foliar spray this year for Mn but thought I'd
give it one more season, and ease up on the watering to see if that doesn't
straighten it out. I'll keep in mind about the scale. I'm not
sure I could identify it if I saw it. Any easy way an amateur can tell
if it's scale?
Mark
KS
-----
Original Message -----
From:
Ed Fackler
Sent:
Tuesday, April 08, 2008 11:02 AM
Subject:
Re: [NAFEX] help with peach problem identification
Additionally those symptoms could be caused by inadequate
fertility (N and P especially) or scale can/will cause these
symptoms.
On Tue, Apr 8, 2008 at 11:48 AM, <dmnorton>
wrote:
Mark,
-----
Original Message -----
Sent:
Monday, April 07, 2008 2:13 PM
Subject:
[NAFEX] help with peach problem identification
I've got a small peach tree
problem. Every year I get these black lesions on some of the new
peach shoots. It only occurs on new peach shoots, and they seem
to outgrow it over time. When the shoots get bigger, the
spots fade and eventually disappear.
I haven't paid enough attention, so I
can't say for sure, but the black spots on the new shoots seem to get
worse over winter. I have a spray program for leaf curl and
haven't seen any of leaf curl on these trees. Similarly, I
haven't seen any shot hole on the leaves. Whatever this
is doesn't kill the shoots completely, but does kill some of
the leaf and flower buds. It seems to be worse on trees that are
having problems already. For instance, the pictures of the
diseased shoot below came from a small tree I over-watered last
summer. Vigorously growing trees don't have much problem with
it. Any ideas would be appreciated.
Thanks,
Mark
KS
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