Tea Tree oil for Blackspot and Powdery Mildew?
Zinia
18 years ago
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althea_gw
18 years agotaoseeker
18 years agoRelated Discussions
Powdery Mildew- treating soil?
Comments (26)I've had a terrible time here in L.A.- zone 10- with powdery mildew - this time it got my squash, cucumbers, tomatoes and bush beans; now it's working on my pumpkins. I have tried a bunch of things - milk, baking soda and a little detergent, etc.- but they seem not to work. Realize I probably water too late in the day and put manure on at the wrong time...but still! Most sites states that "treating the soil" is not useful, but one site says to cover with clear plastic and let it sit for 4-6 weeks - longer if it's rainy. Seems like a long time to wait - but I'd do anything to fix this problem! Can anyone help? Another thing - I'm from the South and can't help but notice how much better plants like melons, okra, summer squashes do there. I'd attribute this to it nearly always dropping down to the 50's and 60's at night, instead of staying hot. Am I the only one that thinks this?...See MoreUgh... Rust, Blackspot, Mildew...
Comments (24)The active ingredient in Bayer Advanced Disease Control is tebuconazole. Even though tebuconazole is a German product, the European Union has banned tebuconazole as of 2018. "Most of the pesticides concerned are produced by German chemical industry giants Bayer or BASF, and include Amitrol, Ioxynil, Tepraloxydim, Epoxiconazole, Iprodion, Metconazole, Tebuconazole and Thiacloprid." http://digitaljournal.com/article/265134 ---------------------------------- Apparently the reason for the ban is: "Due to the potential for endocrine disrupting effects, tebuconazole was assessed by the Swedish Chemicals Agency [3] as being potentially removed from the market by EU regulation 1107/2009.[4]" http://en.wikipedia.org/wiki/Tebuconazole --------------------------- Title: Combined exposure to endocrine disrupting pesticides impairs parturition, causes pup mortality and affects sexual differentiation in rats. Authors: Jacobsen PR, Christiansen S, Boberg J, Nellemann C, Hass U. Authors affiliation: Department of Toxicology and Risk Assessment, National Food Institute, Technical University of Denmark, Søborg, Denmark. Published in: Int J Androl. 2010 Apr;33(2):pages 434-42. Abstract: "Risk assessment is currently based on the no observed adverse effect levels (NOAELs) for single compounds. Humans are exposed to a mixture of chemicals and recent studies in our laboratory have shown that combined exposure to endocrine disrupters can cause adverse effects on male sexual development, even though the doses of the single compounds are below their individual NOAELs for anti-androgenic effects. Consequently, we have initiated a large project where the purpose is to study mixture effects of endocrine disrupting pesticides at low doses. In the initial range-finding mixture studies, rats were gavaged during gestation and lactation with five doses of a mixture of the fungicides procymidone, mancozeb, epoxyconazole, tebuconazole and prochloraz. The mixture ratio was chosen according to the doses of each individual pesticide that produced no observable effects on pregnancy length and pup survival in our laboratory and the dose levels used ranged from 25 to 100% of this mixture. All dose levels caused increased gestation length and dose levels above 25% caused impaired parturition leading to markedly decreased number of live born offspring and high pup perinatal mortality. The sexual differentiation of the pups was affected at 25% and higher as anogenital distance was affected in both male and female offspring at birth and the male offspring exhibited malformations of the genital tubercle, increased nipple retention, and decreased prostate and epididymis weights at pup day 13. The results show that doses of endocrine disrupting pesticides, which appear to induce no effects on gestation length, parturition and pup mortality when judged on their own, induced marked adverse effects on these endpoints in concert with other pesticides. In addition, the sexual differentiation of the offspring was affected. This as well as the predictability of the combination effects based on dose-additivity modelling will be studied further in a large dose-response study." http://www.ncbi.nlm.nih.gov/pubmed/20487043 ------------------------------------- A full 2007 reviewed scientific paper: "Endocrine-Disrupting Activities In Vivo of the Fungicides Tebuconazole and Epoxiconazole" http://toxsci.oxfordjournals.org/content/100/2/464.full?sid=89cbb2cc-b636-4c33-bc06-81ecb01b63b5 Here is a link that might be useful: The European Union has banned tebuconazole...See MoreBest Treatment for Powdery Mildew?
Comments (18)I got Grandmother's Hat in Aug '07, so 3 years. And I do have 4th of July, actually 4 of them, and it does not mildew, but it does rust once in awhile in the season. I don't have the others on your list. That said, I exaggerated a little when I said everything mildews here. I recently made a list for publication on the rose society site of roses that don't mildew here, and those were the following roses. Hybrid Tea/Grandifloras: Cherry Parfait (red/white) Frivolous Pink (pink/yellow) Lasting Love (red) Honey Dijon (gold) Stephen Rulo (lavender/brown) . . . Floribundas: Julia Child (yellow) Shockwave (brightest yellow) White Licorice (light yellow) Lovestruck (pink speckled) Playboy (orange/yellow) Gebruder Grimm (brightest orange) Kimberlina (pink) Perfume Tiger (yellow/pink stripe) Hot Cocoa (russet) . . . Shrubs: Darlow's Enigma (white fragrant hybrid musk) Dragon's Blood (dark red big shrub) Red Ribbons (red groundcover) My Stars (thornless dark pink) Rural England (reblooming pink rambler) Route 66 (purple) Mme. Plantier (white once blooming alba) . . . Climbers: Berries n Cream (pink/white stripe) Candy Land (pink/yellow stripe) Fourth of July (red/white stripe) Rhapsody in Blue (it's a climber for me -- purple) Blaze of Glory (brightest orange/red) . . . Mini's: Irene Marie (yellow with red picotee) Swedish Doll (orange/red) Sequoia Twist (orange/yellow stripe) Gourmet Popcorn (white polyantha-like shrub) Gingerbread Man (dark yellow) Gizmo (orange single) Hurdy Gurdy (red/white striped mini climber) . . . Everything else gets sprayed fairly consistently all year. Kathy...See MoreProducts for clematis powdery mildew and rose blackspot
Comments (2)I use Later's Copper Spray, which I bought from Canadian Tire. I'll spray roses,clematis and tomatoes early in the spring, and it seems to do the trick. If I see any signs of problems, then I do a 2nd quick spray. Note: It does leave a powdery coating on the plant for a while, but it's a price I'm willing to pay! Short term pain for long term gain and all that....See MoreField
18 years agotriple_b
16 years agoeejones_ku_edu
15 years ago
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