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7/17/2013

Hops Heat-stress Symptoms

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Grower notes: Seeing heat-stress symptoms in some hop yards.
The older lower leaves yellow and fall off without any obvious signs of pests or disease. This is more common in years with a wet spring followed by a hot & dry June/July. The side arms are short but usually loaded with burrs in reaction to the stress. The hop plant is attempting to "re-balance" its transpiration losses through the foliage versus what the root system can supply. (The wet spring reduced the root mass.) To help the plants adjust and keep cone development on track, apply a top dressing of a guano or organic manure (we use Naturesafe Stressguard for this) and keep adequate water supplied. (and pray for rain:) )
Picture
Hops - Bottom Leaves Turning Yellow
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    Lynn, the head hop grower at Great Lakes Hops has over 30 years of experience in the horticultural field. Browse the blog articles here to find useful growing information for humulus lupulus, based on personal experience and observations at Great Lakes Hops.

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  • Home
  • Retail - Shop Now
  • Select Hops
    • Select Hops Program
    • Hop Sensory
    • Brew Group
    • Aztec™
    • Hydra™
    • Paradigm™
    • Bergamot™
    • Emerald Spire™
    • Gemini™
    • Mackinac™
    • Michigan Copper™
  • Select Hop Locator
  • Commercial Ordering
    • USDA Exclusive Hop Varieties >
      • Triumph
    • Availability
    • Commercial Contact
  • Hops Blog
  • Hops DOCS
  • FAQ