Hey, Ted!
Years ago I had a severe aphid infestation on my Pistia,Lemna and Spirodella. I went out and collected some Hydrometrids, or =E2=80=9Cwatermeasurers=E2=80=9D or =E2=80=9Cmarsh treaders=E2=80=9D if you prefer. These predatory insects did agreat job of cleaning them out. I put three in the aquarium and in a month theaphids were gone and I had many more Hydrometrids. You will find them in Michiganwalking on permanent water where there is heavy emergent vegetation andprotection from waves. I have found them on large lakes in northern Montana wherethere are small protected inlets with lots of emergent vegetation and shade. Ihave also found them along quiet streams under overhanging banks.
Here are some links:
http://insects.ummz.lsa.umich.edu/~ethanbr/aim/sp/heteroptera/sp_hom_hydrometridae.html
http://www.umd.umich.edu/eic/aquatic_insecta/hemiptera/hydrometridae_family.htm
http://www.waterbugkey.vcsu.edu/php/familydetail.php?idnum=3D9&f=3DHydrometridae&ls=3Dadult
Cheers,
Christopher
D.Christopher Rogers
SeniorInvertebrate Ecologist/ Taxonomist
((,///////////=3D=3D=3D=3D=3D=3D=3D<
EcoAnalysts, Inc.
1.530.383.4798
P.O. Box 4098
Davis, CA 95616
USA
=C2=9FInvertebrate Taxonomy
=C2=9FEndangered Species
=C2=9FEcological Studies
=C2=9FBioassessment
=C2=9FInvasive Species
=C2=9FPlankton
=C2=9FPhycology
IDAHO =E2=88=99 CALIFORNIA =E2=88=99 MISSOURI =E2=88=99PENNSYLVANIA =E2=88=99 ONTARIO
WWW.ECOANALYSTS.COM=C2=A0 =E2=88=99 ECO@ECOANALYSTS.COM
-----Original Message-----
From: aroid-l-bounces@gizmoworks.com [mailto:aroid-l-bounces@gizmoworks.com] OnBehalf Of Theodore Held
Sent: Thursday, July 16, 2009 11:05 AM
To: Aroid-l@gizmoworks.com
Subject: [Aroid-l] Aphis on Pistia
Dear List,
To my surprise I found that an aquarium of mine with alayer of
floating Pistia contained numerous tiny aphids, evidentlyparasitising
what I assumed previously to be a pest-resistant aroid.The aphids in
question are slightly yellowish-brown in color. OtherPistia I have
are not infested. Does anyone have any knowledge of thiscuriosity?
I can send a vial of preserved specimens in case we havea legit
parasitologist reading this.
Ted Held
_______________________________________________
Aroid-L mailing list
Aroid-L@www.gizmoworks.com
http://www.gizmoworks.com/mailman/listinfo/aroid-l
Checked by AVG - www.avg.com
Version: 8.5.375 / Virus Database: 270.13.16/2241 -Release Date: 07/16/09 05:58:00
IAS on Facebook
IAS on Instagram
