Biological Control in Greenhouses

DR_GROSS gross at georgian.edu
Wed Mar 4 15:59:01 EST 1998


     Bill,
     
     I DO have experience with biological control in our teaching/research 
     greenhouse that houses about 250 species.  We've been using biological 
     control agents since 1994 to control spider mites, scale, thrips and 
     mealybugs as part of an Integrated Pest Management Program that 
     includes the use of insecticidal soap.  I'm happy to say I have all of 
     the above under control, although they aren't extinct due to 
     re-infestation through windows on our rooftop greenhouse.  What works 
     best will depend on the plant species you have and your greenhouse 
     climate conditions.  If I were you I'd try contacting an entomologist 
     at one of the biological control supply houses.  While I'm not 
     endorsing one vendor over another, we order our predatory mites (a 
     mixture of Phytoseiulus persimilis and Neoseiulus californicus to 
     control spider mites, and Neoseiulus cucumeris to control thrips) 
     three times a year (April, July and October) from IPM Laboratories, 
     Inc., PO Box 300, Locke NY  13092-0300 (phone 315-497-2063) and have 
     been very satisfied with their service.  It may take a while to get 
     and maintain control because of a number of factors, not the least of 
     which (this time of year) is the lack of reproduction that occurs when 
     hours of daylight and temperatures are low.  I think that a number of 
     vendors sell mixes of predators to help ensure that at least one 
     species will find your culture conditions suitable.  We re-order 
     beneficials on a regular basis to ensure that lack of predator 
     reproduction doesn't become a problem.  I'll be giving a paper or 
     poster on this in probably the ESA education section of the combined 
     BSA/ESA/etc. meeting in Baltimore.
     
     Mike Gross
     Assoc Prof Biology
     Chairperson, Biology Dept
     Georgian Court College
     Lakewood, NJ  08701-2697
     gross at georgian.edu
     http://www.georgian.edu/biology/gross/bi_gross.htm


______________________________ Reply Separator _________________________________
Subject: Re: Biological Control in Greenhouses
Author:  gd3 at umail.umd.edu at ~internet
Date:    3/4/98 3:27 PM


This is a multi-part message in MIME format.
     
--------------5C846A407F8E
Content-Type: text/plain; charset=us-ascii 
Content-Transfer-Encoding: 7bit
     
Bill Williams wrote:
> 
> I'd like to get in touch with people who have personal experience with = 
> biological control in teaching/research greenhouses.  We have been =
> experiencing serious spider-mite problems that threaten several students' = 
> research projects, and after many applications of "bombs," which require = 
> evacuation of the greenhouse for 24 h and very likely have at least some = 
> effects on plant growth, we still appear to have a mite problem.  I know = 
> that many greenhouses use biological control (mostly ladybugs), but I =
> don't know how effective people have found this to be and what the best =
> control agents are for spider mites.  There appear to be some helpful web = 
> sites and I'm sure there's literature, but I'd much prefer to talk with =
> people who have actually tried biological control of spider mites. 
> 
> Thanks,
> 
> Bill Williams
> St. Mary's College of Maryland
     
     
Hi Bill,
     
Good to hear from you on the plant-ed listserver.
     
I do not have any personal experience using any of these agents, but I 
found some informantion that should prove useful.  The best source is 
the Geiger Co. catalog of Horticultural Supplies, which you can order by 
phone at 1-800-443-4437 or by Fax at 1-800-432-9434 (I have also 
attached the URL for their webpage). The catalog costs $10, but all of 
the information is available on their website under IPM.  
     
They recommend Amblyseius (Neosieulus) fallacis as a very good 
all-around predatory mite (except in very hot and dry conditios).  These 
are predatory mites that control several pest mite species.  I would 
probably recommend this one as well, since you can get a pyrethrin 
resistant strain of A. fallacis on bean leaves.  This may be important 
in a greenhouse where you may need to spray (or someone else may spray) 
another pesticide (especially a fungicide) that will kill the predatory 
mites as well.  This is especially true for the use of Benomyl (Benlate) 
as a fungicide to which A. fallacis is moderately sensitive (Cornell 
Cooperative Extension Bullitin).  
     
They also recommend Galendromis (Typhlodromis) occidentalis for use in 
hot summertime greenhouses.  The problem is that these are much more 
expensive ($100 vs. $48) although you get about an order of magnitude 
more of these bugs (5,000) on corn grits than the number that you get 
(500) on the bean leaves.  However you can get twice the number (10,000) 
of non-resistant A. fallacis on vermiculite for $50.  The cheapest and 
best known spider mite biocontrol predator is Phytoseiulus persimilis 
which you can get for as little as $15.
     
As I said, I am no expert in this field and have absolutly no 
experience, but I hope this helps.
     
Gerry
     
--------------5C846A407F8E
Content-Type: text/html; charset=iso-8859-1 
Content-Transfer-Encoding: quoted-printable 
Content-Base: "http://www.hortnet.com/ecgeiger/"
     
<BASE HREF=3D"http://www.hortnet.com/ecgeiger/">
     
<HTML>
<HEAD>
  <META NAME=3D"GENERATOR" CONTENT=3D"Adobe PageMill 2.0 Mac"> 
  <TITLE>E.C. Geiger, Inc.</TITLE>
</HEAD>
<BODY BGCOLOR=3D"#ffffff" ALINK=3D"#ffffff" LINK=3D"#ffffff">
     
<P><CENTER><BR>
<IMG SRC=3D"ecimages/logo2.gif" WIDTH=3D"144" HEIGHT=3D"122" ALIGN=3D"BOT= 
TOM" NATURALSIZEFLAG=3D
"3"></CENTER></P>
     
<P><CENTER><MAP NAME=3D"menubar">
    <AREA SHAPE=3D"rect" COORDS=3D"389,0,517,28" HREF=3D"ipmsystems.html"=
 TARGET=3D"_self">
    <AREA SHAPE=3D"rect" COORDS=3D"315,1,375,26" HREF=3D"geiger_news.html=
" TARGET=3D"_self">
    <AREA SHAPE=3D"rect" COORDS=3D"211,0,296,25" HREF=3D"products.html" T=
ARGET=3D"_self">
    <AREA SHAPE=3D"rect" COORDS=3D"115,0,196,27" HREF=3D"bimonthly/specia=
ls.html" TARGET=3D"_self">
    <AREA SHAPE=3D"rect" COORDS=3D"2,0,99,26" HREF=3D"salesinfo.html" TAR=
GET=3D"_self">
</MAP><IMG SRC=3D"ecimages/menubar.gif" WIDTH=3D"516" HEIGHT=3D"29" ALIGN= 
=3D"BOTTOM"
NATURALSIZEFLAG=3D"3" USEMAP=3D"#menubar" ISMAP> <TABLE WIDTH=3D"566" HEI= 
GHT=3D
"565" BORDER=3D"2" CELLSPACING=3D"2" CELLPADDING=3D"5"> 
<TR>
<TD VALIGN=3D"TOP" WIDTH=3D"28%" HEIGHT=3D"508"><P>&nbsp;<IMG SRC=3D"ecim= 
ages/98suppcover.gif" WIDTH=3D"121" HEIGHT=3D"148" ALIGN=3D
"BOTTOM" NATURALSIZEFLAG=3D"3"><BR>
<B><FONT COLOR=3D"#1E4A11">Welcome to 1998! </FONT></B></P>
     
<P><FONT COLOR=3D"#1E4A11">Here at The Geiger Companies this means we hav= 
e
reached our seventieth year of service to the grower. We offer the same 
friendly service we always have, but now offer the grower more options as=
     
to how we provide that service.<I>Order any time day or night via this we= 
bsite!</I></FONT></P>
     
<P><FONT COLOR=3D"#1E4A11">Above is our 1998 Catalog Supplement which act= 
s
as a companion to the 328 Page 1997 Catalog, and will get you up-to-date 
with new products we have added during the course of the year.</FONT></TD= 
>
<TD WIDTH=3D"72%" VALIGN=3D"TOP"><P><FONT COLOR=3D"#FF0000"><IMG SRC=3D"e= 
cimages/1997cover.gif" WIDTH=3D"114" =
     
HEIGHT=3D"152" ALIGN=3D"RIGHT" NATURALSIZEFLAG=3D"0"></FONT>&nbsp;<B>Get = 
Your
Geiger Companies Catalog </B></P>
     
<P>The catalog contains over 320 pages of high quality horticultural supp= 
lies.
This is still the best way to get an idea of the true scope of products 
we carry. The catalog costs $10.00 <I>which is refunded with your first 
order.</I> You can use our order form to order your catalog here using a 
credit card or you can call, or fax us your order.</P>
     
<P><B>The 1998 Inventory is here, and we are literally stocked to the raf= 
ters!</B></P>
     
<P>Our warehouses are full of grower supplies...chemicals, containers, gr= 
eenhouse
coverings, fertilizers, equipment, you name it....we've got it.</P>
     
<P><IMG SRC=3D"ecimages/kordinventory.gif" WIDTH=3D"162" HEIGHT=3D"161" A= 
LIGN=3D
"LEFT" NATURALSIZEFLAG=3D"3"><B>New! Naan Irrigation Systems</B></P>
     
<P>The Geiger Companies are very pleased to have been named as sole distr= 
ibutor
of Naan Irrigation Systems in the eastern half of the United States. Naan=
     
is an Isreali company which produces superb irrigation systems which have=
     
turned arid desert into fertile crop producing land, so you can bet that 
Naan will work for you in your greenhouse or nursery situation. You can 
get full information on the addition of Naan in our <BR>
<IMG SRC=3D"ecimages/Naan1.gif" WIDTH=3D"82" HEIGHT=3D"34" ALIGN=3D"RIGHT= 
" NATURALSIZEFLAG=3D
"0">news section.</P>
     
<P><BR>
<B>Get Information on the Chemicals we Carry!</B></P>
     
<P>We have added the chemical information available in the 98 Catalog sup= 
plement
to our products section....have a look!</P>
     
<P ALIGN=3DRIGHT><MAP NAME=3D"email">
    <AREA SHAPE=3D"rect" COORDS=3D"0,0,90,29" HREF=3D"mailto:ecgsales at hor=
tnet.com" TARGET=3D"=FF=C1">
</MAP><IMG SRC=3D"ecimages/email.gif" WIDTH=3D"90" HEIGHT=3D"29" USEMAP=3D= 
"#email"
ALIGN=3D"BOTTOM" NATURALSIZEFLAG=3D"3" ISMAP></TD></TR> 
<TR>
<TD HEIGHT=3D"46" BGCOLOR=3D"#ffba30"><P><CENTER><MAP NAME=3D"button">
    <AREA SHAPE=3D"rect" COORDS=3D"0,0,22,22" HREF=3D"orderform.html">
</MAP><IMG SRC=3D"ecimages/button.gif" WIDTH=3D"22" HEIGHT=3D"22" ALIGN=3D= 
"LEFT"
NATURALSIZEFLAG=3D"3" USEMAP=3D"#button" ISMAP><B><FONT COLOR=3D"#FF0000"= 
>Yes,
I would like <BR>
to order a Catalog!</FONT></B></CENTER></TD>
<TD BGCOLOR=3D"#fffcd4"><FONT COLOR=3D"#663300">If you have any comments = 
or suggestions on how we
can serve you better, please call us at 1-800-443-4437 or send us e-mail 
=2E</FONT></TD></TR>
</TABLE>
</CENTER></P>
     
<P><CENTER><STRONG><FONT SIZE=3D-1>Phone: </FONT></STRONG><FONT SIZE=3D-1= 
>215.256.6511
<STRONG>Fax: </STRONG>215.256.6110 <STRONG>Telex: </STRONG>510.661.8744 
<BR>
<STRONG>Toll Free Phone: </STRONG>800.443.4437 <STRONG>Fax: </STRONG>82.9= 
434<BR>
<STRONG>E-mail:</STRONG>ecgsales at hortnet.com<BR> 
Or reach us by US mail.</FONT></CENTER></P>
     
<P><CENTER><FONT COLOR=3D"#FFFFFF">Horticulture Greenhouse Bedding Plants=
     
Insecticides Fungicides Growth Regulators Herbicides Plants Propagation 
Soil Mixes Greenhouse Supplies Horticultural Supplies Nurseries Growers 
Supplies Green Industry Containers Chemicals Nursery Associations Chemica= 
l
Manufacturers Horticulturalist</FONT></CENTER> 
</BODY>
</HTML>
     
--------------5C846A407F8E--
     
     




More information about the Plant-ed mailing list