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Midway District

Midway Extension District #15

Ellsworth Office:
210 N. Kansas
Suite #1, Courthouse
Ellsworth, KS 67439
785-472-4442  

Russell Office:
309 S. Fossil
Russell, KS 67665
785-483-3157

Hours: Monday-Friday
8:00 a.m. - 5:00 p.m.
(Closed for lunch 12-1)

Freeze Damage

freeze injury

Temperatures that can cause freeze injury to wheat at spring growth stages.

Growth StageApproximate Primary SymptomsYield Effect
 Injurious Temp
(two hours)
  
Tillering12 FLeaf Chlorosis; Burning of leaf tips; Silage Odor; Blue cast to fieldsSlight to Moderate
Jointing24 FDeath of growing point; Leaf yellowing or burning; Lesions, splitting, or bending of lower stem; OdorModerate to Severe
Boot28 FFloret sterility; Spike trapped in boot; Damage to lower stem; Leaf discoloration; OdorModerate to Severe
Heading30 FFloret sterility; while awns or while spikes; Damage to lower stem; Leaf discolorationSevere
Flowering30 FFloret sterility; while awns or while spikes; Damage to lower stem; Leaf discolorationSevere
Milk28 FWhite awns or white spikes; Damage to lower stems; Leaf discoloration; Shrunken, roughened, or discolored kernelsModerate to Severe
Dough28 FShriveled, discolored kernels; Poor germinationSlight to Moderate

-Taken from Kansas State University Agricultural Experiment Station and Cooperative Extension Service C-646 Publication

KSRE

Sam Lincoln

District Director
Crops / Horticulture Agent
210 N. Kansas Suite #1
Ellsworth, KS 67439
785-472-4442
samlincoln@ksu.edu


freeze

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