Does anybody know reputable orchid growers/ nurseries in Madagascar. We will be going there within the next month or so & would like to get some Madagascan species. Thanks Hennie Steyn --- [EMAIL PROTECTED] wrote:
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(Peter Fowler) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 21 Aug 2007 07:28:00 -0300 > From: Jean Allen-Ikeson > <[EMAIL PROTECTED]> > Subject: [OGD] modine heaters on the floor > To: [email protected] > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=iso-8859-1 > > I have two 75,000 btu Modine greenhouse heaters and > I never have any ?sepal? > burn even though there are plants within 15? of the > heater. Mine are ?hung? > in welded steel cradles that sit on patio stones. > Anyone that wants a photo > of the cradles should contact me off line. The > further specs for spacing of > the hanging bolts are in the manual for the heaters. > You should not get any > damage from combustion gases because they have a > power vent. The only thing > I would suggest is to not put the vents at chest > height as the installers > like to do, but make them put a couple of elbows in > and then put the vents ? > up the side of the greenhouse---two reasons: first > that way you recover some > of the heat lost out the vent as it warms the length > of the vent, and > secondly if you live somewhere where you get heavy > snows or drifting, the > last thing you want is the outlet to become plugged > by blowing snow or > drifts?and yes it can happen. And never ever install > the heater on the side > wall where snow sliding off the roof can build up. . > .It isn?t fun to have > to get up all night to shovel the vent out, which I > had to do with my first > greenhouse where I had a Hunter, similar to Empire, > direct vent heater. > These also rust out fairly quickly and I had to > replace the supplied > thermostat with a heavy duty one as the supplied one > corroded within a year > in the greenhouse. I also have a friend that > installed a boiler system > designed for homes?they had constant problems until > they moved it out of the > greenhouse and into an attached shed because of the > humidity in the > greenhouse. Bottom line is: buy something designed > for greenhouses and high > humidity. You can buy the Modines with stainless > steel or aluminum > ?insides??the stainless has twice the guarantee. > > > > Windsor Greenhouse > > RR 2, 345 Gabriel Rd, Falmouth, NS B0P 1L0 > > 866-798-0514; FAX 902-798-1131 > > [EMAIL PROTECTED] > > www.windsorgreenhouse.com > > > > > > ------------------------------ > > Message: 2 > Date: Tue, 21 Aug 2007 07:18:53 -0400 > From: [EMAIL PROTECTED] > Subject: [OGD] fooling the wasp (Australia) > To: [email protected] > Message-ID: > <[EMAIL PROTECTED]> > Content-Type: text/plain; charset=us-ascii; > format=flowed > > "a... native orchid trying to outwit a randy male > wasp... > > Anne Gaskett, a PhD student from Macquarie > University in Sydney... > uses advanced colour technology... to understand how > five species of native > tongue orchids trick a male wasp into believing he > has found a sexual partner. > > She says the findings will help to develop > environmentally sensitive pest > controls and conserve orchid species. > > Ms Gaskett looked at the orchid dupe wasp > (Lissopimpla excelsa). And she > says as far as the male is concerned, tongue orchids > have "curves in all > the right places". > > But the wasp is fooled for only so long. > Her research found that even after just a few > exposures to the orchid the > wasp avoids trying to have sex with it. > > Ms Gaskett from the Department of Biological > Sciences says the orchid must > then enhance its mimicry of the female wasp to > continue to attract the male > wasp and pollinate. > "This means only the most persuasive orchids will > continue to reproduce," > she says. > ... > Orchids are the only plant whose flowers trick > insects using such sexual > deception. The aim is to convince the insect to > 'mate' with them. The > insect accidentally collects pollen on its body, > which is then transported > to another flower. > > Ms Gaskett says the orchid dupe wasp is attracted to > and pollinates five > species of tongue orchid in the genus Cryptostylis. > This is unusual as normally one insect pollinates > one species of orchid. > She says this means the five orchid species, which > look completely > different to the human eye, must look and feel the > same to the male wasp. > ... > Ms Gaskett used a spectrometer to analyse the > colours of four of the five > species and a female wasp. > Taking into account factors including the background > colour, ambient light > and colour range of the male wasp's receptors, she > found the orchid > replicates almost exactly the colours of the female > orchid dupe wasp. > > She has also found 'hidden shapes' that feel like a > female wasp to the > male, including 'love handles' the male wasp grip > onto while mating. > ... > Ms Gaskett... > is now studying the perfume of the orchids and > testing them on wasp > antennae to look at the role of smell in the > seduction process." > > URL : > http://abc.net.au/news/stories/2007/08/21/2010644.htm?section=australia > > *************** > Regards, > > VB > === message truncated === ____________________________________________________________________________________ Yahoo! oneSearch: Finally, mobile search that gives answers, not web links. http://mobile.yahoo.com/mobileweb/onesearch?refer=1ONXIC _______________________________________________ the OrchidGuide Digest (OGD) [email protected] http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com
