It is, of course, obvious that speed, or height of fall, is not in itself injurious ... but a high rate of change of velocity, such as occurs after a 10 story fall onto concrete, is another matter.
Pyrethrin, It's organic neurotoxin that attack the nervous systems of all leaf eating insects and is my main go to for leaf eaters. Pyrethrin is the main ingredient in many different organic insecticide and I use Monetary Take Down Garden Spray and it works very well. I spray just before dark so I don't harm the beneficial insects.
How long lived is Pyrethrin? I use BT for cabbage worms, but I know it is broken down within 7 days.
My understanding, from a buddy with a license for chemicals, it lasts for about 6 months. It also can eventually wind up where you don't want it. But, it does the trick. Evolvers theory is that it lasts overnight. YMMV
Same as Bt. It's the UV rays that breaks it down. But Pyrethrin also controls aphids and stink bugs. I should have mentioned it kills certain dirty rotten sap suckers too.
Pyrethrin - Wikipedia, the free encyclopedia
History and biosynthesis
The pyrethrins occur in the seed cases of the perennial plant pyrethrum (Chrysanthemum cinerariaefolium), which has long been grown commercially to supply the insecticide.
Well after their use as insecticides, their chemical structure were determined by Hermann Staudinger and Lavoslav Ružička in 1924.[1]Pyrethrin I and pyrethrin II are structurally related esters with a cyclopropane core. Pyrethrin I is a derivative of (+)-trans-chrysanthemic acid.[2][3] Pyrethrin II is closely related but one methyl group is oxidized to a carboxymethyl group, the resulting core being called pyrethric acid. Knowledge of their structures opened the way for the production of synthetic analogues, which are called pyrethroids. In terms of their biosynthesis, pyrethrins are classified as terpenoids, being derived from dimethylallyl pyrophosphate, which combine by the action of the enzyme chrysanthemyl diphosphate synthase.[4]
Last edited by eagle326; 01-17-2012 at 12:48 AM.
LOL I'm telling you there has been many of times that I would have welcomed the NAPALM blast in our garden... I can't even tell you how bad I just wanted to blow all these fucken bugs to hell... Just as I found a good control for the bugs I had I get the MOTHER OF ALL BUGS... NEMATODES!!!!! GRRRRRRRRR!!!!! )*%^%#$ On second thought... Bring on the Napalm.
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