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market-farming - Re: [Market-farming] Neem oil advice needed

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  • From: "William H Shoemaker" <wshoemak AT illinois.edu>
  • To: <gofish54 AT centurytel.net>, "'Market Farming'" <market-farming AT lists.ibiblio.org>
  • Subject: Re: [Market-farming] Neem oil advice needed
  • Date: Fri, 6 Aug 2010 07:05:10 -0500

I don't know about high temps with neem specifically, but anytime you use an
oil based product at high temps, you are taking a risk. It'll melt the
protective cuticle layer on the surface of green tissues, putting the tissue
at risk of sunburn. I'm pretty sure that the type of oil you use and rate of
oil-to-water are important. I prefer to use such things late in the day,
when the sun is heading down to the horizon. That gives the plant plenty of
time to adjust and build the cuticle back up. If you can use more water in
the spray that can help, and wait for slightly cooler temps, or a cloudy
day.

Bill
William H. Shoemaker
Sr. Research Specialist, Food Crops
University of Illinois - Crop Sciences
St Charles Horticulture Research Center
535 Randall Road, St Charles, IL, 60174
630-584-7254, FAX-584-4610
wshoemak AT illinois.edu

-----Original Message-----
From: market-farming-bounces AT lists.ibiblio.org
[mailto:market-farming-bounces AT lists.ibiblio.org] On Behalf Of Mac
Sent: Thursday, August 05, 2010 4:12 PM
To: market-farming
Subject: [Market-farming] Neem oil advice needed

Any precautions on using neem oil on tomatoes? One thing I read cautioned
using it in temps above 85. Any advice? Thanks
Mac

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