Permaculture forum: Rain and irrigation contamination of produce

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Charter ATP Member
Nov 13, 2015 5:28 PM CST

Suggests waiting 24 hours after rain/irrigation to avoid crop contamination.
Name: Cindy
Hobart, IN zone 5
aka CindyMzone5
Celebrating Gardening: 2015 Plant Identifier
Nov 13, 2015 5:59 PM CST
Hmm - wondering if this problem is less of an issue in small home gardens?

Charter ATP Member
Nov 15, 2015 5:21 PM CST
The tests were done in commercial spinach fields, but rain is rain. it does make you wonder.
Name: Rick Corey
Everett WA 98204 (Zone 8a)
Sunset Zone 5. Koppen Csb. Eco 2f
I helped beta test the first seed swap Plant and/or Seed Trader Seed Starter Region: Pacific Northwest Photo Contest Winner: 2014 Vegetable Grower
Avid Green Pages Reviewer Garden Ideas: Master Level Garden Sages I was one of the first 300 contributors to the plant database! I helped plan and beta test the plant database. Charter ATP Member
Dec 9, 2015 7:32 PM CST
Maybe this hints at the actual mechanism we should focus on, rather than "rain":

"In total, 1492 samples comprising of water, leaf and fecal matter were collected for the analysis."

I've read people saying they drive past commercial fields with workers taking a dump right in the field.
Any home gardeners who do that should not harvest right after rain!

Or, if the fields were recently manured with raw manure, I would hope they would have mentioned that in the paper! But I think there are federal regs about how long you have to compost before applying manure.

Having mulch under leafy crops always sounded smart to me.

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