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- From: Bob Randall <YearRoundGardening@comcast.net>
- To: North American Fruit Explorers <nafex@lists.ibiblio.org>
- Subject: Re: [NAFEX] Organic vs Standard Spray Programs
- Date: Tue, 15 Apr 2008 12:14:08 -0500
Hi I hate to get involved in this sort of debate since there aren't really any definitive answers and whichever side you come down on in this debate requires a lot of belief and investment and time. At one time I was a pesticide research chemist (malathion) and then became a specialist in ecological issues and at this point vastly prefer organic ecological approaches. In the last two decades I have worked with both gardeners and farmers in the Houston area as growers have gradually turned from chemical approaches to ecological/organic ones--and I respect all of them. It ain't easy. Chemistry as a science predates ecology by about two centuries, and chemistry had a great deal of government money put into it partly because it was useful in war. So it shouldn't be any surprise that 20th century agriculture turned to chemistry to control pests and to fertilize crops, and that many people still use these concepts to grow things. That is what they know and have been trained on, and these methods sort of work at least if you focus on production and bottom line (which is very understandable), and ignore water pollution and medical problems in farmers (see the fact sheets at www.pesticide.org and www.pesticideinfo.org or look at http://www.cdc.gov/nasd/search.html to see what is known about problems with particular pesticides). Then there is the need for cheap fossil fuel to create the fertilizers. 94% of chemical nitrogen fertilizer's cost is said to be natural gas, and the price of that has more than trebled in the last ten years, so a cheaper way to fertilize should be something we all want. As well, organics and especially agro-ecology has made giant strides since the 1950's by studying practical methods for pest control and enhanced soil fertility. Essentially the modern idea is to build up an ecosystem where disease organisms, insects and other pests have their own natural enemies more or less deliberately propagated by the grower. Pests need to have pests. Fertility and disease control is created especially by feeding soil dwelling-microbes the right foods. See http://soils.usda.gov/sqi/concepts/soil_biology/biology.html for a good explanation of how this approach to soil fertility works My sense is that in the Houston area, these approaches work very well on all fruits except stone fruit and perhaps bunch grapes. They certainly work well on pecans, citrus, apples, pears, persimmons, muscadines, jujubes, figs, blackberries, and muskmelons and there are reasons to think the other fruits may be growable soon as well. Tomatoes are clearly easier to grow here organically than with chemicals. As for comparative costs, the truth is that we don't really know. Large farms however often invest heavily in specialized equipment for one crop that is very expensive, so the cost per tree drops significantly the more of a mono-crop is grown. But mono-crops are one of the hardest types of crops to grow organically and no mono-crop is ever ecological. So if you must grow a huge amount of one thing, organics are the least effective. My guess is that the idea that chemistry is better suited than biology for growing plants is a byproduct of academic history, and in a century everyone will think of chemical agriculture as an inefficient earlier form now obsolete. Whether it is more or less productive right now in particular places with particular crops depends a lot on the place, the crop, the length of time it has been used, and especially what the grower knows about the two methods. Bob Randall, Ph.D. On Apr 14, 2008, at 9:30 PM, Mark & Helen Angermayer wrote:
"Share What You Grow and What You Know!" Bob Randall, Ph.D. 713-661-9737 |
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[NAFEX] Organic vs Standard Spray Programs,
dmnorton, 04/09/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Road's End Farm, 04/14/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Karen Tillou, 04/14/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Mark & Helen Angermayer, 04/14/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Road's End Farm, 04/14/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Mark & Helen Angermayer, 04/14/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Road's End Farm, 04/15/2008
- Re: [NAFEX] Organic vs Standard Spray Programs, Mark & Helen Angermayer, 04/15/2008
- Re: [NAFEX] Organic vs Standard Spray Programs, Bob Randall, 04/15/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Road's End Farm, 04/15/2008
- Re: [NAFEX] Flavor was Organic vs Standard Spray Programs, Betty Mayfield, 04/17/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Mark & Helen Angermayer, 04/14/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Road's End Farm, 04/14/2008
- Re: [NAFEX] Organic vs Standard Spray Programs, Road's End Farm, 04/14/2008
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[NAFEX] organic fruit in the East?,
Donna &/or Kieran, 04/17/2008
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[NAFEX] Insect ID Help,
Scott Williamson, 04/18/2008
- Re: [NAFEX] Insect ID Help, Hilborn . E, 04/18/2008
- Re: [NAFEX] Insect ID Help, dmnorton, 04/19/2008
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[NAFEX] Insect ID Help,
Scott Williamson, 04/18/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Mark & Helen Angermayer, 04/14/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Stephen Sadler, 04/15/2008
- Re: [NAFEX] Organic vs Standard Spray Programs, dmnorton, 04/16/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Karen Tillou, 04/14/2008
- Re: [NAFEX] Organic vs Standard Spray Programs, Road's End Farm, 04/14/2008
- <Possible follow-up(s)>
- [NAFEX] Organic vs Standard Spray Programs, Jim Fruth, 04/10/2008
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Re: [NAFEX] Organic vs Standard Spray Programs,
Road's End Farm, 04/14/2008
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