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Disease management


Factors / Guidelines by crop (concluded)

Wheat

Seed Rots and Seedling Blights
Select high-quality, vigorous,
   disease-free seed of an adapted
   cultivar.
Plant at the proper depth and
   spacing when conditions are
   favorable for rapid germination
   and growth.
Use a fungicide seed treatment 
   if poor quality seed is used or
   when planting conditions are
   unfavorable.

Root Diseases
Rotate with non-small grains
   crops.
Plant winter wheat after the
   Hessian fly- free date, spring 
   wheat at the earliest suitable
   date.
Maintain adequate, balanced soil
    fertility levels.
Selectively choose wheat 
   cultivars. (They differ in their
   tolerance or resistance to take-
   all and common root rot.)
Control volunteer wheat, barley
   and other grasses that can serve
   as alternate hosts for the root rot
   pathogens.
Consider using seed treat
    fungicides.

Take-all disease in wheat.

Foliar Diseases
Control volunteer wheat where
   continuous cropping is practiced.

Plant high-quality, disease-free
   seed of an adapted cultivar.
Select varieties with resistance 
   or good tolerance to the 
   diseases.
Plant winter wheat after the
   Hessian fly-free date, spring 
   wheat at the earliest suitable 
   date.
Maintain adequate, balanced soil
   fertility levels. (Excessive 
   nitrogen rates often increase
   disease severity.)
Consider the use of foliar
    fungicides.

Take-all disease in wheat.

Head Diseases
Rotate crops.
Plant high-quality, disease-free
    seed of an adapted cultivar.
Use seed treated with a 
    fungicide where there is a
    potential for bunt or loose smut.
Consider seed treated with a
    fungicide where seed may carry
    spores of the scab or Septoria
    fungi.

Virus Diseases
Select adapted cultivars with 
   good resistance or tolerance to 
   the viral disease.
Plant winter wheat after the
   Hessian fly-free date, spring 
   wheat at the earliest suitable date.
Control volunteer grain and weeds
    beginning in the fall and 3-4 
    weeks before seeding to prevent
    the buildup of root pathogens on
    host plant roots. Early control of
    this "green bridge" has proven to
    be an important root diseases
    management tool, particularly for
    no-till seedings.


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