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  Mealy bugs on Amorphophallus.
From: Neil Gordon neil at ng23.abelgratis.co.uk> on 2003.11.14 at 12:55:18(10802)
Ive got an infestation of Mealybugs on my A. Bulbifer.
They seem immune to everything i spray on them, and keep coming back.

Has anyone got any tips on getting rid of them.

It looks like the Amorphophallus is the only one of my plants affected
by them.

+More
From: Dan Levin levin at pixar.com> on 2003.11.14 at 14:54:25(10803)
Neil-

I also had the misfortune of a mealybug invasion some time ago.
Kinder & gentler methodologies aside, the only effective approach
was the repeated use of systemic insecticides. In my case, a two
installment spray/ drench application of Merit (= Imidacloprid) spaced
3 - 4 weeks apart resulted in complete control with zero phytotoxicity
noted on any of my very mixed collection.

As you've noticed, mealy's can be difficult pests to eradicate. This is
especially so if your plants have been targeted by "root mealybugs";
surface/ contact sprays never seem to completely eliminate them.

You would also be well advised to treat your entire collection; at the
very least all of those plants growing in the same area as your bulbifer.
In my experience there is no such thing as a mealybug infestation
limited to just a single plant (well, this assumes you're growing more
than just one plant!), especially if the pests have been evident for
some time.

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From: Neil Gordon neil at ng23.abelgratis.co.uk> on 2003.11.14 at 19:07:14(10805)
Ive taken to just squashing them when i see them, ill have to be a bit
more intense with the sprays then. Nearly all of my other plants are
succulents and caudiciforms, and apart for some Aloes, ive not seen
them on any other plants, but theyre coming from somewhere! Thanks for
the advice.

Neil

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From: "Wilbert Hetterscheid (prive)" hetter at worldonline.nl> on 2003.11.14 at 22:00:31(10807)
Dan,

Did you indeed eradicate root mealy bugs too with that Merrit stuff? How do
you apply it as systemic stuff? Do you drench the soil when the Amorph is
growing?

Cheerio,
Wilbert

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From: rajshekhar misra rajshekharmisra at yahoo.com> on 2003.11.15 at 00:17:16(10809)
Neil
Mealy bugs on Amorphophallus is a serious problem. If
allowed to multiply, the sprouting of the tubers is
affected. I encounter this problem every year when I
store my tubers for next season planting. If the mealy
bugs are visible on freshly harvested tubers, the
problem is compunded.
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From: colin howells latisectus2003 at yahoo.co.uk> on 2003.11.15 at 03:14:54(10811)
Hi Neil, I use a cheap artists paintbrush and methylated spirits to get rid of them on my cacti. It works o.k. and the plants come to no harm. The only problem is that you have to persevere with the treatment and keep your eyes open for any further infestation. The problem with mealy bugs and scale is penetrating the outer coat. Hope this helps. Regards Colin. Neil Gordon wrote:Ive got an infestation of Mealybugs on my A. Bulbifer.
They seem immune to everything i spray on them, and keep coming back.

Has anyone got any tips on getting rid of them.

It looks like the Amorphophallus is the only one of my plants affected
by them.

+More
From: Dan Levin levin at pixar.com> on 2003.11.16 at 15:41:48(10820)
Sir Wilbert,

> Did you indeed eradicate root mealy bugs too with that Merrit stuff?

Yes, I did. Merit is a slow but rather effective systemic insecticide. It is a
chloronicotinyl compound which disrupts the post synaptic nervous system
in a number of specific plant sucking pests, root mealybug included. That
said, it's not worth beans as a miticide/ acaricide. I've also observed little
to no efficacy against fungus gnats, but then it's not labeled for any of those
particular pests- so there you go.

Imidacloprid (Merit, Marathon) is most commonly used here in the states on
turf (for cutworms, grubs, etc.), trees (often injected to control chafers, borers, etc.)
and as an alternative to Chlordane in structural pest control (subterranean termites
in soil). Imidacloprid exhibits very low mammalian toxicity, relatively speaking.

> How do you apply it as systemic stuff? Do you drench the soil when the Amorph is
> growing?

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