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  <title>White powdery fungus on cucumber leaves - Grow Organic! - tribe.net</title>
  <link rel="alternate" href="http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca?format=atom" />
  <subtitle>Tribe.net. Local Connections</subtitle>
  <entry>
    <title>Re: White powdery fungus on cucumber leaves</title>
    <link rel="alternate" href="http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#e7c5fc8b-cb52-4451-83f2-56aa8b3002f1" />
    <author>
      <name>Xiomara</name>
    </author>
    <id>http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#e7c5fc8b-cb52-4451-83f2-56aa8b3002f1</id>
    <updated>2009-06-29T16:26:20Z</updated>
    <published>2009-06-29T16:26:20Z</published>
    <summary type="html">Thanks!</summary>
    <dc:creator>Xiomara</dc:creator>
    <dc:date>2009-06-29T16:26:20Z</dc:date>
  </entry>
  <entry>
    <title>Re: White powdery fungus on cucumber leaves</title>
    <link rel="alternate" href="http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#07bbf8e1-2585-460f-a789-1300ef7b2530" />
    <author>
      <name>wil</name>
    </author>
    <id>http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#07bbf8e1-2585-460f-a789-1300ef7b2530</id>
    <updated>2009-06-29T13:10:43Z</updated>
    <published>2009-06-29T13:10:43Z</published>
    <summary type="html">I remember that cucumbers were the first thing i used neem on.  When it was new on the scene here in the 70's i think,  that is what it was recommended for as it repels cucumber beetles for some time.  These are a bad pest here, and they spread bacterial diseases and mildew as well as munching the hell out of them.  Anyway,  neem is a wonderful botanical with many uses. &#xD;
&#xD;
Here is a thread where gardeners talk about using it on powdery mildew in squash and cukes:&#xD;
http://www.helpfulgardener.com/phpBB2/viewtopic.php?t=14348</summary>
    <dc:creator>wil</dc:creator>
    <dc:date>2009-06-29T13:10:43Z</dc:date>
  </entry>
  <entry>
    <title>Re: White powdery fungus on cucumber leaves</title>
    <link rel="alternate" href="http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#867aabdf-22ed-41b4-a6b4-01abe2e7510b" />
    <author>
      <name>lorenzo</name>
    </author>
    <id>http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#867aabdf-22ed-41b4-a6b4-01abe2e7510b</id>
    <updated>2009-06-28T22:09:02Z</updated>
    <published>2009-06-28T22:09:02Z</published>
    <summary type="html">last year i had this on the zuke leaves, they are cousins. . .people said water only in the morning to prevent that. . .it was too late then, but soon i will be seeding again. . .we'll see. .</summary>
    <dc:creator>lorenzo</dc:creator>
    <dc:date>2009-06-28T22:09:02Z</dc:date>
  </entry>
  <entry>
    <title>Re: White powdery fungus on cucumber leaves</title>
    <link rel="alternate" href="http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#60fbda75-5e3b-4e27-9ba6-5cec6abb87a8" />
    <author>
      <name>wil</name>
    </author>
    <id>http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#60fbda75-5e3b-4e27-9ba6-5cec6abb87a8</id>
    <updated>2009-06-28T21:49:14Z</updated>
    <published>2009-06-28T21:49:14Z</published>
    <summary type="html">Neem also a fungicide.  &#xD;
&#xD;
Here is a good page on powdery mildew:&#xD;
http://www.ext.colostate.edu/pubs/garden/02902.html&#xD;
&#xD;
and the wikipedia entry for neem oil uses:&#xD;
http://en.wikipedia.org/wiki/Neem_oil#Uses</summary>
    <dc:creator>wil</dc:creator>
    <dc:date>2009-06-28T21:49:14Z</dc:date>
  </entry>
  <entry>
    <title>Re: White powdery fungus on cucumber leaves</title>
    <link rel="alternate" href="http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#20c0af9c-2858-42ea-8d1a-598a70969c56" />
    <author>
      <name>Deborah</name>
    </author>
    <id>http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#20c0af9c-2858-42ea-8d1a-598a70969c56</id>
    <updated>2009-06-28T20:54:41Z</updated>
    <published>2009-06-28T20:54:41Z</published>
    <summary type="html">Could be powdery mildew....starts as whites spots on the underside of leaves but eventually covers the entire leaf with powdery areas....&#xD;
&#xD;
There is a possibility that you can control it with a baking soda spray applied once a week:&#xD;
1 teaspoon baking soda to 1 quart water.  &#xD;
Note though that if you can't control it it will spread to other plants.&#xD;
&#xD;
The most common solution is to thin your plants, remove and destroy all infected parts, disinfect your hands and tools in a bleach solution:  1 part bleach 4 parts water  after each cut.&#xD;
&#xD;
In addition to pruning: apply a cooper based fungicide every 7 to 10 days (stop 3 to 4 weeks before harvest). &#xD;
&#xD;
As for NEEM it is used on insects and works as a repellent and insecticide.</summary>
    <dc:creator>Deborah</dc:creator>
    <dc:date>2009-06-28T20:54:41Z</dc:date>
  </entry>
  <entry>
    <title>Re: White powdery fungus on cucumber leaves</title>
    <link rel="alternate" href="http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#aaf9db2a-eeee-42a2-82c7-c7f9dce5bdb1" />
    <author>
      <name>wil</name>
    </author>
    <id>http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#aaf9db2a-eeee-42a2-82c7-c7f9dce5bdb1</id>
    <updated>2009-06-28T20:46:58Z</updated>
    <published>2009-06-28T20:46:58Z</published>
    <summary type="html">Powdery mildew.  Yeah, neem is what i'd use.  Use it in the evening so the hot  Sun doesn't hit leaves fresh sprayed.  Water them well, then spray.</summary>
    <dc:creator>wil</dc:creator>
    <dc:date>2009-06-28T20:46:58Z</dc:date>
  </entry>
  <entry>
    <title>White powdery fungus on cucumber leaves</title>
    <link rel="alternate" href="http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#2347f51d-78b3-4ab5-a3fa-ef349272f976" />
    <author>
      <name>Xiomara</name>
    </author>
    <id>http://greenthumbs.tribe.net/thread/96533d17-adf2-4864-88c0-a673472ee0ca#2347f51d-78b3-4ab5-a3fa-ef349272f976</id>
    <updated>2009-06-28T19:36:49Z</updated>
    <published>2009-06-28T19:36:49Z</published>
    <summary type="html">Does anyone know what this is and what I can do about them? I am assuming it is a fungus.  Would neem work?</summary>
    <dc:creator>Xiomara</dc:creator>
    <dc:date>2009-06-28T19:36:49Z</dc:date>
  </entry>
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