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Nutrient deficiency symptoms of onion and garlic

Nitrogen (N)   

 

 

 

 Onion

Garlic 

 

Symptoms Older mature leaves turn paler green colour
As the deficiency progresses these older leaves become uniformly yellow (chlorotic). Bulb size becomes small and unmarketable 

Management : If deficiency occurs in the field, foliar spray of urea @ 1.0 % recommended for avoiding complete yield loss. 

Phosphorus (P)   

 

 

 

 Onion

Garlic

 

Symptoms The older leaves gradually turn to yellow while the inner leaves remain dark green. 
Plants remain dwarf, show poor root growth and no bulb development

Management If deficiency is diagnosed during the mid growth stage of crop, foliar application with 1.0 -2.0 % DAP may partly alleviate deficiency

   
Potassium (K)Symptoms  
 
 

 Onion

Garlic

 

Symptoms Potassium (K) K deficient plants show drooping, yellowing of leaf margin. 
Prolonged deficiency cause necrosis from the tip and start drying towards the base.
In severe cases the whole plant can collapse and die 

Management If K Deficiency occurs in the mid growth stages, K deficiency may be corrected with foliar application of KNO3 or K2SO4 @ 0.5-1.0 % K   

   
 Zinc (Zn)Symptoms  

 

 

 Onion

Garlic

 

Symptoms  Zinc (Zn) Deficiency of zinc shows chlorosis on the young leaves. The inner leaves turn yellow and exhibit tip drying. 

Management Apply zinc fertilizer when soil test shows below 0.6 ppm Foliar application of zinc sulphate also can be done @ 0.25 % overcome the deficiency in the field

 Garlic  
 Manganese (Mn)  
   

 Onion

  

Symptoms  Deficiency appears in young leaves. Young leaves turn yellow in colour and turn white.

Management Foliar application of 0.25-0.50 % MnSO4 

   
 Boron (B)  
   

 Garlic

  
Symptoms Boron deficiency results in cessation of terminal bud growth. Emergence of young leaves was restricted and 3-4 small leaves were recorded in plant. Plant height was only 7-8 cm even 90 days after planting. Acute deficiency caused the death of the plants. There was no bulb formation was observed. 

Management Foliar application of 0.25% B is recommended for B deficient plants  

   
   
Last Updated on Tuesday, 21 May 2013 09:13
 

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