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  • March 15th 2013 Issue
  • Story by Richard Lehnert

    • Working with copper

    Used correctly, copper sprays cut costs and are effective against bacteria and fungi.

    Copper is a potent spray chemical, useful on many stone and pome fruits. It is active against bacterial diseases like fireblight, bacterial canker, and bacterial spot, and fungal diseases like cherry leaf spot, peach leaf curl, and apple scab as well. Used correctly, copper sprays, especially very early in the season before plant growth starts, prevent overwintering disease inocula from infecting new tissue and set the stage for lower disease pressure when life resumes in spring. 5 TIPS FOR USING COPPER 1. Solubility of fixed coppers increases under acidic conditions. Copper sprays will become more phytotoxic if they are applied […]

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    Apples, Pest Management, Diseases, Richard Lehnert
    Picture of Richard Lehnert
    Richard Lehnert
    After growing up on a Michigan dairy farm, Richard Lehnert began writing about farming in 1962, while still a junior studying journalism at Michigan State University. He worked at newspapers for a year before joining the staff of Michigan Farmer, where he spent 26 years, the last 15 as chief editor. He was a member of the staff of Good Fruit Grower from 2010 until 2015. Read his stories: Story Index
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