Yellow lower leaves SoCal UPDATE

oceano(Calif)August 14, 2009

The symptoms--yellow, dying lower leaves, wilting, leaf curl, but continued slow growth--seem to fit "nematodes". Therefore I exhumed a plant to examine the roots. You can see the evidence I discovered in the link below.

At five inches under the soil, a stratum of white, perhaps mold, appeared in the sterile compost bed. However, it didn't seem significant. The roots appear normal and show no signs of gall or knotting, which are apparently characteristics of nematode damage.

The level of moisture in the soil seemed fine and evenly distributed. There was no pooling of water or rot around the tap root. Since it is hard to tell whether you;re watering too much or too little, this was interesting. I water once a week or more. It is tempting to water often because of the appearance of wilting, but I didn;t; and the soil one foot deep was still damp. Therefore I eliminate over-watering as cause of the problem.

I also eliminate nematodes, since the roots system seems healthy (anybody disagree?).

Hmmm. There's an insect on close examination of the plant. Is that a thrip?

As I said in a previous post, I believe I have slowed the progress of whatever this disease is by weekly heavy application of neem oil, an insecticide (and by one application of Diazinon).

I have now ruled out nematodes. Any theories or corrections appreciated.

Here is a link that might be useful: Roots 8.14.09

Thank you for reporting this comment. Undo
jean001(z8aPortland, OR)

Responses are in your other post at

Here is a link that might be useful: your other, but same conetnt, post

    Bookmark   August 14, 2009 at 11:37PM
Sign Up to comment
More Discussions
P.Brandywine bumpy soft ,green curling leaves
Firstly, I'm a raw newbie. Please forgive any faux...
Need help with wilt
Since the ground is infected with the wilt and don't...
Yellow spots on leaves
Hi, I have several tomato plants that I started as...
New Forum Sucks
Why is it when you have something great someone comes...
Can you identify what's happening to my Celebrity Tomato?
Just planted my celebrity tomato into a raised garden....
Sponsored Products
59" Dabert Double Vessel Wall Mount Sink w/Vanity & Mirror - Dk Wood Finish
Signature Hardware
Divi Nickel Amethyst 12 1/2" Plug-In Swing Arm Wall Light
Euro Style Lighting
Juno 4" Black Baffle White Trim Recessed Light
$31.99 | Lamps Plus
Ingo Maurer | Birdie's Nest Ceiling Light
Ergohuman Executive Chair With Headrest in Gray
$624.00 | LexMod
Brushed Nickel Floor Lamp: Brookfield 41 in. Natural Spectrum Floor Lamp with Co
Home Depot
© 2015 Houzz Inc. Houzz® The new way to design your home™