Thank you, Nina for your advice.

Only one more question... if I can't cure de verticillium, how
can I prevent this
disease?

-Ireneu-

In rough order of importance:

1. Acquire healthy plants -- especially plants that are less
susceptible (that does NOT include maples). (see below)
2. Use fresh, standard, inorganic bonsai soil and NO soil from
an old compost pile, the garden or elsewhere "in nature." (You
CAN sterilize old bonsai soil, but there's no guarantee that you
will get everything.)
3. Practice clean, safe bonsai; keep tables free of rotting
leaves, spilled soil and the other "stuff" that comes from
growing plants. Use clean tools (wash in alcohol if they are
used on a suspicious tree).
4. Do not let soil stay wet/soggy/cold for excessive lengths of
time. (With weather like we've had the last 2 weeks, THAT is
impossible!!!)
5. Give the trees as much sun as possible (as much as they can
take).
6. Use Nitrogen rich fertilizer.

Or, don't fret TOO much. Do as much of the above as you can,
then roll with the punches if something happens -- and chances
are that it will not. ------- MY preference.

A healthy plant (from start to finish) is less likely to have
insect pests OR plant disease.

Resistant plants include: Archostaphylos, Betula, Buxus,
Carpinus, Ceanothus, Cornus, Crataegus, Eucalyptus, Fagus,
Gleditsia, Ilex, Juglans, Liquidamber, Malus, Morus, Nerium,
Platanus, Quercus, Salix, Tilia, MOST conifers, and Monocots like
bamboo, etc. (Ortho Home Garden Problem Solver)

Jim Lewis - - Tallahassee, FL - Only where
people have learned to appreciate and cherish the landscape and
its living cover will they treat it with the care and respect it
should have - Paul Bigelow Sears.

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