will copper on plants kill them?

Answer 1

Many products contain copper to treat fungus of various plants.

Answer 2

No. Copper is used as a fungicide for tomato plants. We used to spray our tunnel tomatoes with copper each winter to keep the fungal diseases like botrytis, leaf mould and anthracnose at bay. Copper is also useful as a supplement inhuman nutrition. It increases the absorption of iron, and lowers cholesterol.

Answer 3

Under most garden settings, no it will not, though soil pH does play a major role in determining Copper phytotoxicity. Copper like many metals is a micro-nutrient needed in seed setting, chlorophyll formation, and for cellular function.
Copper fungicides are noted for discoloring flowers and foliage of some plants but not for burning or browning leaves.
Copper (Cu) deficiency shows in stunted, distorted growth and no seed set. This is more common than toxic amounts unless copper sulfate is being used to treat fungus on a long term basis. Copper in this form is not very mobile in the soil.
There is evidence that overuse of copper based fungicide in agricultural use effects soil microbial life and earthworms.
http://www.regional.org.au/au/asssi/supersoil2004/s3/oral/1573_vanzwieten.htm
This paper notes that agricultural soils with high copper residues have been observed to have few earthworms and reduced microbial biomass, while stressing all microorganisms that are present. Plants are symbiotic with many of the soil denizens so in the long run they will also become increasingly stressed but repeated use in fields where Bordeaux mixture has been used are still productive.
Copper does not leach out from pipes or other metal forms unless the pH is extremely low. Then the pH is more of problem than excess copper. Copper cations are strongly held by clay and organic material. They are used by soil microbes in constant small quantities.
Phytotoxic forms of Cu can be diminished by raising the pH above 6.5 and adding fresh organics to bind the available Cu. "The critical concentration of readily soluble Cu varied from 1.7 to 2.5 mg/kg in soils with pH 5.7 to 6.5." http://soil.scijournals.org/cgi/content/full/64/3/955

Excess copper can be seen in darker green leaves that develop an iron chlorosis. Color leaches from between the veins of the leaves first but progresses til nearly all color is gone. This will be in very low pH soil.

Answer 4

if you're spraying liquid copper on your plants, it's used as an anti-fungal treatment for plants and trees. Check on the instructions on the bottle to see what it is used for.

Answer 5

do you mean slugs .if you do, no but they dont like copper.

Answer 6

With their big boots probably.

Or nick them.

Answer 7

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Copper sulfate will kill just about anything that grows.


What are you asking specifically?