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Landscaping & Gardening Information |
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Black Walnut Trees Produce A Natural Insecticide
The black walnut tree manufactures a substance that is anatural insecticide according to experts at the Texas StateUniversity in Austin. American black walnut tress contain a tannic acid chemistscall juglone. The reddish yellow substance leaches fromleaves, and some believe exudes from roots, or transfersfrom branches and foliage to the roots. Tree physiologistsagree that roots of other plants that come in contact withthose black walnut tree roots die--even other black walnutseedlings. Juglone is sometimes washed out of the still green walnutsduring late summer or even autumn rains. The growth ofplants 60 to 80 feet away are inhibited by the juglone. Thesubstance affects plants of various families. Studies havefound that tomatoes, alfalfa, potatoes, apples,blackberries, rhododendron, mountain laurel and pine treesare all affected. According to a professor and extension forester at IowaState University, juglone is known to repel various gardeninsects. Just by placing branches of the tree around thehouse and under furniture dog and cat owners are amazed tofind that their pets have fewer fleas. For more information on natural flea control: http://www.apluswriting.net/onlynaturalpetstore/fleacontrol.htm For more information on natural garden products: http://www.apluswriting.net/garden/gardensalive.htm REQUIREMENTS FOR REPRINT: You have permission to publishthis article free of charge in your e-zine, newsletter,ebook, print publication or on your website ONLY if itremains unchanged and you include the copyright and authorinformation (Resource Box) at the end. You may not usethis article in any unsolicited commercial email (spam). You may retrieve this article by: Autoresponder: juglone@getresponse.com Website: http://www.apluswriting.net/articles/juglone.txt Copyright: 2005 Marilyn Pokorney Please leave the resource box intact with an active link,and send a courtesy copy of the publication in which thearticle appears to: marilynp@nctc.net ------------------------------------------------------------ Author: Marilyn PokorneyFreelance writer of science, nature, animals and theenvironment.Also loves crafts, gardening, and reading.Website: http://www.apluswriting.net
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