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aphid +‎ -cide


aphidicide (plural aphidicides)

  1. Any man-made substance that kills aphids.
    • 2005, Philip McMillan Browse, Heligan: Fruit, Flowers and Herbs:
      Aphids can be controlled by spraying with a modern (targetted) aphidicide early in the season, as a routine precaution, or soft soap sprays can be used on a regular basis.
  2. (rare) The act of killing aphids.
    • 1990, Allen Lacy, The American Gardener:
      Lacewings, the beautiful, iridescent "nerve-winged" insects of the order Neuroptera, produce larvae that specialize in aphidicide, though they won't pass up ...