Cascalote tree losing leaves

I live in the AZ desert and have a Cascalote tree [Caesalpinia cacalaco] that my local nursery planted. It's approx. 8 feet tall x 8 feet wide. It was beautiful when it was planted four months ago, but the tree is not doing well now. The leaves are turning yellow, and leaves are falling off big time. I'm wondering if I might be over- watering it (what are the symptoms of over-watering a tree???) Also, some of the leaves seem to have little specks of a white crystalline substance on them -- it kind of looks like rock salt. Is that a sign of an insect problem? Thank you for any information. -john
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
No thoughts or ideas? Anyone?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
zgraf said:

The only though from way up here in Michigan is, perhaps to consult the nursery. They planted it for you. Did they offer some sort of guarantee?
Knock a branch over a sheet of white paper and check to see if any tiny insects can be seen crawling on it. (A quick Googling suggests that psyllid infestation is possible in April/May.)
--
Pat in Plymouth MI

"So, it was all a dream."
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Thanks, Pat. Appreciate the information.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
replying to zgraf , John S. wrote:

I have the same problem with a Cascalote tree in our yard. It has the same symptoms of dropping leaves and the little crystal specks on the leaves. Did you ever get an answer or solution?
John S.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On 4/20/2014 11:45 AM, John S. wrote:

According to Sunset's "Western Garden Book", you are likely overwatering it. This is a drought-tolerant tree that needs "well-drained soil and infrequent, deep watering."
--
David E. Ross
Climate: California Mediterranean, see
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
replying to zgraf , Jo -arizona wrote:

Try power hosing the entire tree every few days. This aids in controlling them. I also recommend spraying with a general purpose pesticide once a week for two to three weeks.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Jo -arizona wrote:

The description is not very clear. What do you think 'they' are? It is an idea to find out what you are dealing with before spraying.
--
David

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
replying to David Hare-Scott , Jo wrote:

I don't know what ' they' are even after considerable research.That's why I advised using a general purpose spray. We had the same problem on a cascolote tree where I work and by power hosing them they disappeared and the tree recuperated. The "bugs' showed up again this spring so I am repeating the power hosing treatment and spraying with an all purpose insecticide spray and it is definitely having an effect.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.