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Post by bluelacedredhead on Jun 3, 2010 18:36:14 GMT -5
Trichinosis was a problem when hogs were fed a diet consisting of rotting garbage; before the days of refrigeration and deepfreezers being commonplace in homes.
These days, pigs are mostly fed commercially prepared feeds. Those of us who raise pigs on a small acreage often supplement their diets with fallen fruits, garden trimmings and even allow them to forage in fields. But hog husbandry is much healthier for man and beast with today's standards.
Frozen storage of Pork for 20 days is ample time to kill any threat of Trichinosis. And cooking to an internal temperature of 137F is sufficient to kill the parasite in Pork only.
BTW, the Merck Veterinary manual states that Mammals are all susceptible to the Trichinellosis, however, Hogs, Rats and Bears are the ones most often affected.
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jcm05
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Post by jcm05 on Jun 3, 2010 20:11:44 GMT -5
The particular fungicide families or the systemic part? Both.
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Post by blackthumb on Jun 4, 2010 12:56:41 GMT -5
I e-mailed a local gardening talk show host Ron Wilson about the e-mail you got, and he said he also heard that it was confirmed that there was “late blight” in Northern Kentucky. So apparently now it is confirmed in an additional county.
From my impression is rather unusual for late blight to be as far north as Kentucky, Maryland and Pennsylvania so soon in the year.
I hope this isn't an ominous hint of things to come.
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swampr
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Post by swampr on Jun 4, 2010 13:03:49 GMT -5
this is unscientific, but the plant least affected by late blight in my garden last year was hungarian oval.
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amideutch
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Post by amideutch on Jun 4, 2010 13:40:21 GMT -5
"Fungicides can either be contact, translaminar or systemic. Contact fungicides are not taken up into the plant tissue, & only protect the plant where the spray is deposited; translaminar fungicides redistribute the fungicide from the upper, sprayed leaf surface to the lower, unsprayed surface; systemic fungicides are taken up & redistributed through the xylem vessels to the upper parts of the plant. New leaf growth is protected for a short period."
I think the above pretty much explains the mode of action of different fungicides. To say a fungicide is bad because it's mode of action is systemic is a little premature. It's the chemical makeup that should worry you, not it's mode of action.
Systemic pesticides are not labeled for use on tomatoes
That's a new one on me. I know for a fact Azoxystobin and Phosphorous Acid (Agri-Fos/Exel LG) are labeled for use on tomatoes and both their modes of action are Systemic! And I would eat tomatoes treated by those products before I would eat a tomato treated with Daconil which is a contact/protectant fungicide. Ami
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peppereater
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Post by peppereater on Jun 4, 2010 17:24:09 GMT -5
Ami...thanks for the clarification. I should not have spoken in broad terms, in fact, I have not looked into the issue for many years. I would prefer not to eat anything with pesticide or fungicide residue, but I'm sure I do on occasion because I still buy produce from the grocery store. I'd prefer to eat anything with less toxic properties, whether it be systemic or not. I remain skeptical of the recommended products mentioned earlier, though, and of the safety conferred by the manufacturers or regulatory agencies. Your confidence in the products you mentioned is reassuring, as I believe you've researched them, and have concern for your own health...it is unfortunate that the food industry is more concerned with cost of application than with overall safety.
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amideutch
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Post by amideutch on Jun 5, 2010 7:46:40 GMT -5
Dave, I believe the increased popularity of Organic/Home grown produce is a result of peoples distrust as to how commercial growers (non organic) grow, fertilize and the pesticides used on there crops. At least we backyard gardeners have a choice in those areas. And I have done a lot of reading on Mycrobial Biofertilizers and Biopesticide/fungicides. This year I'm using several on my tomato grow outs. "Biota Max" is one, EM (Effective Microorganisms) is another and a couple products from "BioStart" which are Microbial Soil Inoculants called "Defensor" and "RhizoBoost". I'm also using my normal Mycorrhiza and Actinovate inoculants as well. Ami
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jcm05
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Post by jcm05 on Jun 5, 2010 12:53:27 GMT -5
this is unscientific, but the plant least affected by late blight in my garden last year was hungarian oval. Mine was Daniels. Which I am growing this year along with Mountain Magic and West Virginia '63. Hopefully I wont need to test any resistance.
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Post by blackthumb on Jun 8, 2010 12:51:12 GMT -5
Could someone explain this to me in more simple and common language? It sounds like theoretically late blight could survive a freeze. It sounds like if it did that it might Metamorphoize into a more freeze resistant strain. It sounds like so far there is no hard evidence that it has survived a freeze yet. Source. vegetablemdonline.ppath.cornell.edu/factsheets/Potato_LateBlt.htmSome of you Southerners (warm climate inhabitants) that are used to late blight and using fungicides; might not fully understand why some of us Northerners (cold climate inhabitants) being so ignorant and fearful of late blight, because for most of us back yard growers up north have never had to really worry about late blight because it hasn't affected the most of us. Usually the freeze kills it out and normally it doesn't have a chance to spread to the colder regions in time to decimate most crops. So I have been raising tomatoes for over four decades and never have lost a crop too late blight and have never used fungicides until last year. Though my tomatoes didn't catch late blight till well after the tomatoes peaked and were on the decline and it was near the time that I was starting to think about pulling the plants out of the ground because the temperatures were getting close to freezing. It was quite impressive how quick and aggressive the late blight was. In my over 40 years of growing tomatoes I have never seen tomatoes and the plants rot so fast. I guess I've never realized how privileged and/or lucky that I was that I've never experienced such a decimating disease or had to use fungicides. Using fungicides is new to me; despite the fact that I've been growing tomatoes for over 40 years. Unfortunately now it seems like it might be necessary to use fungicides and to use extra precautions and preventatives.
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swampr
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Post by swampr on Jun 14, 2010 22:15:58 GMT -5
" know for a fact Azoxystrobin and Phosphorous Acid (Agri-Fos/Exel LG) are labeled for use on tomatoes and both their modes of action are Systemic! And I would eat tomatoes treated by those products before I would eat a tomato treated with Daconil which is a contact/protectant fungicide. Ami But, are those two effective against late blight? The MSU article posted indicates the K salts of phosphoric acid might not help at all. K. M. said azoxystrobin effectiveness may also be limited, due to resistant strains of late blight. Hopefully we wont have the weather we had last year.
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jcm05
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Post by jcm05 on Jun 15, 2010 6:33:07 GMT -5
Hopefully we wont have the weather we had last year.
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Post by blackthumb on Jun 15, 2010 17:44:30 GMT -5
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tz
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Post by tz on Jun 15, 2010 18:40:05 GMT -5
oak-ky.org/blog/?p=102I'm not thrilled being between Kentucky, and the people who sent the plants to Kentucky, with Pennsylvania to the side. At least the weather has been wet I did look up the nearest commercial potato farm. It's two counties away, so that would take a day or three for spores to blow from infected volunteer plants, but I suspect there are plenty of infected volunteer taters comming up closer to home. Maybe all the rain is washing the spores out of the air before they can get going.
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Post by blackthumb on Jun 19, 2010 3:49:23 GMT -5
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amideutch
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Post by amideutch on Jun 19, 2010 10:53:40 GMT -5
Late Blight or Phytophthora infestans is an oomycete. Researchers have found that phosphorous acid fungicides are especially effective against Oomycete pathogens, such as Phytophthora, Phythium, and Downy mildews in a number of crops. Phosphorous acid has both a direct and indirect effect on these pathogens. It inhibits a particular process (oxidative phosphorylation). In addition, some evidence suggests that phosphorous acid has an indirect effect by stimulating the plants natural defense response against pathogen attack. The Primary ingredient in Exel LG also marketed as Agri-Fos is Phosphorous Acid. The above text was taken from the following article. Ami
Phosphorous Acid Fungicides Annemiek Schilder, Michigan State University
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