[OGD] physan/RD20 and slugs
As long as the topic of Physan is being discussed. Now that my paphs are outdoors for the summer, I'm adding 1/4 tsp per gallon of RD20 (ammonium chloride, like Physan) to my usual fertilizer Dynagro 10-5-5, to prevent the root rot that sometimes accompanies the heat, humidity, and occasionally irregular watering that occurs in the summer. Normally, I add ProTekt as a pH adjuster, but I leave that out because I find that RD20 already raises the pH somewhat. At any rate, I am wondering if RD20 can also act as a slug repellantwhenever I dump the RD 20 solution I use to soak seedlings in while repotting, I find that the earthworms literally fly out of the soil..slowly followed by the slugs. My guess is that adding RD20 to the fertilizeer will ...hopefully..drive slugs and snails out of the mix. Has anyone had experience with this aspect of quat use? Take care, Eric Muehlbauer in Queens NYpaphs concolor and Goldollar in spike, lots of phrags too ___ the OrchidGuide Digest (OGD) [EMAIL PROTECTED] http://lists.orchidguide.com/mailman/listinfo/orchids
[OGD] Physan..once again and last
Does nothing against virus...Have no idea why they have the temerity to state so...Test HAVE been done and a lecture on the subject delivered to HOGA here in Hawaii...TSP in strong solution is the only chemical currently in use that was verified..Of course there are others..but it was noted that tests have verified some efficiency using it...NOT physan...(P.S.) that is what we are told...If the makers can prove it, let the test results be shown...Bill ___ the OrchidGuide Digest (OGD) [EMAIL PROTECTED] http://lists.orchidguide.com/mailman/listinfo/orchids
[OGD] Physan
Sorry Bert...I have been using the stuff for over 25 years..I absolutely found that at the ratio you ascribe I had very bad distortion in my blooms...This happened repeatedly..So I called up the folks that made it..since we all knew them from shows and meetings, they were very frank and admitted that 2 teaspoons per gallon for orchids was much to high a dose...(they previously had come up with that dosage on their packaging.) they admitted that the higher dosage was fine for other plants but had heard from a great many other Orchidists that they were having problems...You can say...as one of you did, that you will not get results from a few drops...but I am here to tell you that the amount works just fine...More is not always better...try spraying the solution at my rate on a window with algae on it...You will find it kills thoroughly...Now mind you, I am talking in terms of surface problems...An infected leaf...you know, all gooey, needs full strength straight on the area...It dries it up post haste..Use a q tip and only hit the exact area...Bill ___ the OrchidGuide Digest (OGD) [EMAIL PROTECTED] http://lists.orchidguide.com/mailman/listinfo/orchids
[OGD] Physan
Back in April, I contacted Tom Whitehair (Anne Tom Whitehair [mailto:[EMAIL PROTECTED] mailto:%5bmailto:[EMAIL PROTECTED] ) regarding the effectiveness of Physan as a viricide. He was very helpful and sent me a lot of printed material. Physan bills itself as a bactericide, fungicide, algaecide, and viricide. The general dose for most purposes was anywhere from 1 tsp to 1 Tbsp per gallon. I've used 1 tsp/gal on newly unflasked seedlings with great results. I use 2 tsp/gal as a fungicide is potted plants during our hot, humid summers. Three tsp (1Tbsp) was recommended for treating tools, greenhouse walkways and walls, mature infected plants, etc. I've had great luck with Physan stopping erwinia in its tracks. It also takes care of powdery mildew on my dwarf roses (watch the dose though). Generally speaking, I've seen little difference in plant tolerance to any of these strengths applied as a spray, drench or soak. I asked Tom about their claim of efficacy on TMV and the data they supplied was 30 years old. I asked about this and they said no follow-up studies have been done. At this point they are concentrating on expanding their market particularly into more profitable areas. I guess orchid growers just don't use enough of their product to make it worthwhile to update old studies with modern techniques. I shared this information with AJ Hicks at the time. So AJ, if you have something more to add here, please do so before I overstep the boundaries of what I know and inferences I shouldn't make. Gary ___ the OrchidGuide Digest (OGD) [EMAIL PROTECTED] http://lists.orchidguide.com/mailman/listinfo/orchids
