how to get rid of the residue left on the ground after spraying with a weed killer, like roundup. After it rains the spray leaves like a seaweed type mould on the ground particularly bad on metal drives & paths. People have told me the common rustic name is gorilla snot. Any help would be appreciated.
spiritofgonzo,
Feb 1, 1:07am
Not from roundup? What are you actually spraying, im just not sure what this stuff is but roundup leaves no physical residue
nzmax,
Feb 1, 2:23am
Totally agree. Roundup becomes inactive when it comes into contact with soil. Even using dirty water when mixing it can make it inactive.
bluefrog2,
Feb 1, 2:48am
Is this what you mean, Nostoc Commune algae http://www.nginz.co.nz/news/4-284/weedy-nostoc I get it on a small sections of my limestone gravel path when it rains a lot in spring. I think it's caused by damp, shady conditions, and maybe fertiliser runoff on gravel paths. No treatment that I know off. I tried sprinkling copper powder (the stuff used for antifungal sprays), but it didn't have that much effect, and turned the path blue. If there are no plant roots nearby, you could try boiling water from a kettle.
sboydnz,
Feb 1, 3:21am
Yeah. That's the stuff. Goodness, I always thought it was the weed killer, funny though, the areas that I have a lot of trouble are part of a driveway leading to horse stables and a few pathways, not even close to nursery conditions. I have some wet & forget I might try that and see what happens. I will let everyone know what the outcome is. Thanks for the website interesting reading.
jhan,
Feb 1, 3:47am
We had it on our gravel driveway. It seems to grow after spraying with weedkiller and I think it's the dying vegetation, if thick enough, which gives this organism the right environment to thrive. We haven't got it now, I think the hot days shrivelled it or maybe another type of weed killer, we've gone off roundup.
books4nz,
Feb 1, 5:41am
Try spraying it with a mix of 1/2 cup malt vinegar to 3 litres water. this kills mould so maybe will help.
bluefrog2,
Feb 1, 5:03pm
It's related to blue-green algae. If you think about algal blooms, it tends to happen when there's free fertiliser around. I guess if you spray the path, the dead plants break down into fertiliser.
rak1,
Feb 1, 5:21pm
Yep, Nostoc is a menace. Our whole street had it one year, no one knows where it came from. Everyone was blitzing their yards and lawns with moss and mould killers for about 2 years until it finally disapeared. Some of us even scraped it up and put it in rubbish bags to get rid of it.
tourer100,
Feb 1, 5:32pm
Interesting, I had this on garden this year after putting used cocopeat on it, the cocopeat had come from a hydroponic grower, except mine started of yellow, looked like corn kernals. We thought it was the cocopeat but maybe not.
bluefrog2,
Feb 1, 5:36pm
The cocopeat was probably contaminated with nostoc spores, or whatever they grow from.
sboydnz,
Feb 1, 11:53pm
That would be a cheaper option for me. Thank you for the tip I will give it a try
sboydnz,
Aug 4, 3:46pm
Same as. It definitely has something to do with the spray. I buy Glyphosate in the concentrated form, mix it with water to dilute it as per instructions, and spray in dry conditions, as soon as it rains Bingo I get the snot every where I have sprayed. I'll give the vinegar mix a shot and see what happens.
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