[I.M. Boggled]

Pyrethrum
Pyrethrum is a botanical insecticide produced primarily from the flowers of Tanacetum cinerariaefolium, which is a species of the chrysanthemum plant family. It is found mainly in tiny oil-containing glands on the surface of the seed case in the tightly packed flower head and is the plant’s own insecticide that has evolved to keep insects away. Pyrethrum is made up of six complex chemical esters known as pyrethrins which work in combination to repel and kill insects.

Pyrethrin has been used effectively to control insects for decades. It decomposes rapidly in the environment, making it an excellent choice for controlling pests.

Pyrethrin has been extensively studied from a toxicology viewpoint. It is low in acute toxicity to humans and other vertebrate animals, is non-carcinogenic and causes no adverse reproductive affects.

Pyrethrin is commonly used (in the commercaial produce industry) as a post harvest treatment for fruits and vegetables especially during shipment and is popular as a non-residual household insecticide spray.

Pyrethrin
The dried, powdered flowers of the pyrethrum daisy, Tanacetum cinerarifolium, were used as early as 1880 to control mosquitoes. The popularity of pyrethrum insecticides waned when synthetic insecticides were introduced, but they are now enjoying a commercial comeback. Many new products formulated with natural pyrethrums are available.

"PYRE-THRINS" are the insecticidal chemicals extracted from the pyrethrum daisy.

Please do not confuse them with PYRETHROIDS
"PYRE-THROIDS", is the term for a new class of synthetic pesticides.

Pyrethrums, which are mainly concentrated in the seeds of the flower head, are a contact insecticide, meaning the insect only has to touch the substance to be affected.

Pyrthrins have a quick knockdown effect on insects: Flying insects are paralyzed. Pyrethrins can be applied up to one day before harvest because they are quickly destroyed by light and heat and are not persistent in the environment.

Pyrthrins will kill lady beetes but do not appear to be harmful to bees.
They are toxic to fish and to the aqautic insects and other small animals that fish eat. Pyrethrins do not seem to be toxic to birds or mammals.


Protection Offered:
Pyrethrins are registered for flowers, fruits, and vegetables, including greenhouse crops.

They are effective on many chewing and sucking insects, including most aphids... spider mites...several species of thrips,...and whiteflies. They are especially good against flies, gnats, mosquitoes, and stored products pests.

How to Make: If you grow your own pyrethrum daisies, you'll have the main ingredient for a make-it-yourself spray.
The concentration of pyrethrums is at its peak when the flowers are in full bloom, from the time the first row of florets open on the central disk opens too the time all the florets are open. pick flowers in full bloom and hang them in a sheltered, dark spot to dry. Once the flowers have dried thoroughly, grind them to afine powder, using a mortar and pestle, old blender or small hammer mill. Mix with water and add a few drops of liquid soap. Store in a glass jar and keep the lid tightly closed, because the mixture looses activity if left open. You'll have to experiment with the amount of water to add, because the concentration of pyrethins in the flowers is an unknown variable. If the spray you make does not seem to kill insects, use less water the next time you make the concentrated spray. Also keep in mind whole flower heads stay potent longer so do not grind until ready to use.

How to Use: Pyrethrins are more effective at lower temperatures, so for best results, apply in early evening when temperatures are lower.

Spray both the upper and lower surfaces of the leaves, because spray must directly contact the insects such as thrips that hide in leaf sheaths and crevices.

The first spray will excite them and bring them out of hiding, the second will kill them.

Never use pyrethrin products around waterways and ponds.

There are various commercial products commonly available these days with the most famous being a brand called Rotenone.
Pyrethrin concentrate in various brands and configurations are readily available in organic gardening supply circles.

Safer Yard & Garden Insect Killer is a good product that is combined (piggybacked)with an insecticidal soap for quick knockdown and broad spectrum control and does comes highly recommended and is generally readily available in the states.

Be sure to read the various product labels and make sure they're not "piggybackin' the popular synthetic PYRETHROIDS poisons into its formulation.

Happy gardening

He's Back! Yay!!!!


Boggled you have been terribly missed on these boards with your incredible information and positive attitude! Thought I didn't notice, didn't ya? Welcome home! :smile:

[Growdoc]

good stuff this post should be marked by all...thanks I.M. Boggled!!!

Welcome back...

GrowDoc

[dHazed]

Pyrethrins are great but don't use them exclusively as the pests (mites in particular) build up a resistance rather quickly. Alternate and or use in addition to other organic, responsible methods.

[skoobie dew]

pyrethrin foggers usually contain pyrethrin butoxide. Pyrethrin butoxide is nasty nasty shit. It goes away quickly, but again it's nasty shit, don't hang out anywhere near your room when you use a fogger. Also isn't pyrethrin bad for house cats? Nobody ever mentions that.

[I.M. Boggled]

Piperonyl butoxide is usually added to pyrethrin to enhance the product's activity by decreasing the metabolism of pyrethrins in arthropods. ...

Piperonyl butoxide (PBO) is a pesticide synergist. It does not, by itself have pesticidal properties. However, when added to insecticide mixtures, typically pyrethrin, pyrethroid, and carbamate insecticides, their potency is increased considerably.

Piperonyl butoxide is a potent cytochrome P450 and non-specific esterase inhibitor. This families of these enzymes act as the principal detoxification pathways for many pesticides. Inhibiting the detoxification pathway allows higher unmetabolised systemic concentrations of the active insecticide to remain within the target animal for a longer period. ...
Its acute oral and dermal toxicity in mammals is low.
https://en.wikipedia.org/wiki/Piperonyl_butoxide
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >>>>>>>>>>>

Toxicity related to pyrethrins is usually associated with applying much more of the product than directed.
Overdosing can cause toxic signs in both dogs and cats.

Permethrins, the synthetic insecticide, has a much greater potential for resulting in toxicity. Permethrin based topical flea products are usually labeled "for use in dogs only." There is a wide safety margin for permethrins in dogs.

Cats, however, are exquisitely susceptible to the toxic effects of permethrins. Application of permethrin-based insecticide to a cat will usually result in toxic signs within 6 hours.
https://www.cat-world.com.au/pyrethri...roid-poisoning

[beta]

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[stoned78]

Im out of pyrethrin :-/ had a small (think it was 10ml and got from a friend) bottle for 10 years.... took about one drop pr. 5 liter of water along with labsuit and gasmask to get rid of bugs.

1L of aquapy cost about 300$ and I need...maybe 10ml again.

I can see this market turned lucrative.... the very very low concentration sprays are very expensive and cover almost nothing.

I have a small concentrated spruzit bottle but im used to use the real stuff.

Anyone know where I can buy ex. beyer aquapy In a small bottle (10/25ml) that will fullfill my needs?

any potato farmers outthere?

[joken]

The State of Oregon put out a notice that use of this stuff may cause your bud to fail the test for pesticides. Ken

[amanda88]

I grow Geraniums for this very reason ...as a bud deterrent

it works well with the companion planting idea

but if you always get bugs look to your grow method

as bugs like lions will go for the weaker easier kill

cheers/