This picture shows the type of protective kaolin clay deposit that is necessary to provide complete protection of foliage and fruit in the OFP treatment. In 2004, a wet year, it was difficult to maintain the necessary protective film of kaolin clay on trees in the organic system and eleven applications were needed; however, only four kaolin applications were needed in 2005. One of the weaknesses of the organic system appears to be the cost of the multiple applications needed to maintain the coverage of kaolin and the negative effects of the kaolin on predacious mites. Further experimentation with application rates and timing in 2006 should help to determine the appropriate use of this material.

 

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