gr33ntea Posted February 15, 2015 I have no idea how this happened. A friend gave me a cactus for grafting, the graft was successful but the scion died from black rot that turned its inside to mush. Now a cactus next to it (the one in pictures) has started to rot,They are in the shade, it couldn't have been the sun. I cut it out and then applied sulphur. Also, sould i just cut it off? I cut all around it, can it still receive nutrients? Share this post Link to post Share on other sites
gtarman Posted February 15, 2015 I'd say shade is a lot more likely to cause rot than sun. Especially if they're getting a bit too much water or nute action. Not sure about the rot being contagious but my first inkling is that it would most likely be the environment they're being kept in being conducive to rot. Share this post Link to post Share on other sites
zelly Posted February 15, 2015 Xylem & Phloem If you knew about xylem & phloem, you'd know the answer to your question about survival. The potting soil appears to be all peat? wood forest product? coir? trichs love a fast draining soil & really dislike wet feet. awesome xylem & phloem tutorial https://www.youtube.com/watch?v=xGCnuXxbZGk 1 Share this post Link to post Share on other sites
gr33ntea Posted February 15, 2015 I just have some peat there cause i didnt know where to throw it. It is a soil mixture.Well i guess i should cut it off after watching that informative video. Thanks ZellyGtarman are you suggesting i move it to the full sun? The soil if anything was actually dry, this happened to me before but the sun did it so i thought they would be safe in the shade. Plus i got some grafts on them Share this post Link to post Share on other sites
gr33ntea Posted February 15, 2015 I just remembered i sprayed it with Mortein natureguard spray But i doubt that had anything to do with it Share this post Link to post Share on other sites
theuserformallyknownasd00d Posted February 15, 2015 Didn't someone do this to a loph once and it melt? Share this post Link to post Share on other sites
theuserformallyknownasd00d Posted February 15, 2015 Spray another one just to double check..? Share this post Link to post Share on other sites
gr33ntea Posted February 15, 2015 Lmao, Sure why not, all in the name of science and enriching the SAB community I'll do it to a prickly pear. 1 Share this post Link to post Share on other sites
Señor Corrochio Posted February 15, 2015 Don't do it! The spray probably contains Pyrethrins/Pyrethroids, which should be what did it. 1 Share this post Link to post Share on other sites
Micromegas Posted February 15, 2015 I killed about a dozen plants with fly spray once attempting to kill earwigs. I can't actually remember how they died, but large parts of larger plants died and smaller plants died altogether. The plants ended up as a brown shriveled mess, but curiously i just cannot recollect the stages it took to get there, but it was very quick like a few days only. Share this post Link to post Share on other sites
Señor Corrochio Posted February 15, 2015 It does contain Pyrethrins (http://www.rb-msds.com.au/uploadedFiles/pdf/Mortein%20NaturGard%20Auto%20Indoor%20Insect%20Control%20System-v5-D0107881.pdf). Just google "cactus pyrethrin". Tons of the results are actually from SAB. Share this post Link to post Share on other sites
gtarman Posted February 16, 2015 Gtarman are you suggesting i move it to the full sun? The soil if anything was actually dry, this happened to me before but the sun did it so i thought they would be safe in the shade. The fact that it's happened again now in the shade would suggest to me that it wasn't the sun that caused this. Cacti are generally very-well suited to bright light and I always kept mine in full sun - they loved it, and experienced fewer problems with rot than if kept in shade. I don't really graft things at all so I can't really comment in that sense except to say that if the graft is established and both the scion and the stock plants are both sun-lovers (which IME = most columnar cacti) then having it in the sun won't hurt it. I've had a trich grafted onto peres in full sun before and it did just as well as the others. 1 Share this post Link to post Share on other sites
gr33ntea Posted February 16, 2015 Don't do it! The spray probably contains Pyrethrins/Pyrethroids, which should be what did it. I killed about a dozen plants with fly spray once attempting to kill earwigs. I can't actually remember how they died, but large parts of larger plants died and smaller plants died altogether. The plants ended up as a brown shriveled mess, but curiously i just cannot recollect the stages it took to get there, but it was very quick like a few days only. Well FUDGE! THanks guys! SO it was the ready to spray insect killer. Goddammit, i was actually going to spray everything with it to ward off fungus gnats and caterpillar. You can't learn without making mistakes. DOes anyone know of any cactus friendly insect spray? Share this post Link to post Share on other sites
gr33ntea Posted February 16, 2015 Just found the answer from another thread. Thanks. Hey TeoI've sprayed multicrop 'BugGuard' insect spray straight onto one of my small peres/loph grafts without ill effects (on the plant).The active constituent is 8.5g/L Potassium salts of fatty acids.Oh and good luck with the farm. Share this post Link to post Share on other sites
Señor Corrochio Posted February 16, 2015 You may also find diatomaceous earth useful and cheaper. Honestly though I don't think there's any feasible solution against caterpillars... You'd have to stay vigilant day after day which is just ridiculous. 1 Share this post Link to post Share on other sites
Evil Genius Posted February 17, 2015 Yes, rot is contageous. "Rot" is just a nice word for fungal and bacterial infections. And the shade or high humitdy opens doors to it spreading to the weaker plants. 2 Share this post Link to post Share on other sites
gtarman Posted February 17, 2015 ^ I don't know if we're calling rot a *nice* word are we now? lol...still sounds pretty gross to me Share this post Link to post Share on other sites
Evil Genius Posted February 17, 2015 What I meant is that it´s a very simplificated and generic name for a huge number of different Infections that all have the potential to be contagious. There is a large number of different pathogens that are simply called "rot" because you would have to run microbiological tests every single time and that´s not likely to happen. I have books with hundreds of pathogens and just by looking at the infection, it´s usually not possible to ID it.And some are more agressive than others. 2 Share this post Link to post Share on other sites
gr33ntea Posted February 17, 2015 I grafted a loph williamsi var. huizache on the san pedro stock. I sprayed bug spray around the cacti stock. Although my san pedro stock survived it looks worse than Palestine and very ugly. What I meant is that it´s a very simplificated and generic name for a huge number of different Infections that all have the potential to be contagious. I will word my post better next time Share this post Link to post Share on other sites
Evil Genius Posted February 17, 2015 Hi Gr33ntea, no no, absolutely nothing wrong with your post. Was not intending to lecture you and sorry if that was coming across like that. Was just trying to point out that the word can stand for benign and malignous types that are a.) not easy to differentiate and b.) have totally different hazard potential. So yes and no. It´s contagious but some more than others. 1 Share this post Link to post Share on other sites
hostilis Posted February 17, 2015 I once made a pyrethrin mixture and sprayed it on all of my indoor grafted plants (under flouro lights) and it killed like 50% of them and every single pere lost all of it's leaves . Lots of lophs and trichs rotted. It was very sad. Share this post Link to post Share on other sites
M S Smith Posted February 18, 2015 I'd rather have black rot than that. ~Michael~ Share this post Link to post Share on other sites
hostilis Posted February 18, 2015 Sad part is I did tons of research on it and knew that could happen with pyrethrin. I was told (and read) that using water based pyrethrins instead of oil based it wouldn't do that, but it did. It sucked ass big time. I ended up just getting fed up and completely bombed the room with diatomaceous earth and it killed em. Share this post Link to post Share on other sites
