Vegetables - Disease Management          Pat Donald, MU  (573) 882-2716 
                                         Om Sehgal, MU (573) 882-7060

                               KEY
                          1 = Symptoms
                           2 = Control

PEAS      

Seed rot and damping off (several fungi)     
   1.  Outer root tissues decayed leaving central core when pulled
       out of ground. Discolored.    
   2.  Use clean seed that has been treated with seed treatment
       fungicide, Apron 25W (Pythium and Phytophthora damping off).
       Most pea seeds available to the grower are pretreated. Rotate crops.

Powdery mildew (fungus)   Erisiphe polygoni   
   1.  White, powdery coating on leaves, stems and pods. Leaves
       become dwarfed, yellow and misshapen.     
   2.  Use disease-free, fungicide-treated seed. Apply foliar
       fungicide at first signs of mildew; repeat at 7-14 day
       intervals. Use wettable sulfur or sulfur dust--Thiolux 3 lb./A.
         
Wilt (fungus)   Fusarium oxysporum f. sp. pisi     
   1.  Circular spots in field. Stunted, pale yellow-green wilting
       plants. Leaves curl downward. Stems thick and brittle. Xylem
       tissues yellow to orange and then darken.   
   2.  Same procedures as seed rot and damping off. Use varieties
       resistant to Race 1. Long rotations may be necessary, if widespread.