|
Site Specific Nutrient Disorders |
Boron deficiency
|
|
Areas affected
|
|
Boron deficiency is seen in some acid soils where cassava is cultivated in
India.
|
|
Deficiency symptoms
|
Since boron is highly immobile within the phloem, the symptoms of boron
deficiency appear on growing tips of cassava. If plants are uprooted, we can see
very poor lateral root development and death of root tips. The plants will
become shorter by a reduction in intermodal length. At the growing tip of
plants, leaves will be small and deformed with short petioles and gummy lesions
on the petioles. Brown gummy lesions on the petioles at the leaf tip and on
growing portion of stems is a symptom of boron deficiency.
|
Boron deficiency symptoms on cassava leaf
|
Boron deficiency symptoms on cassava stem
|
|
Corrective measures
|
|
In areas where boron deficiency seen, apply 10 kg / ha B as borax or dip the
stakes in 0.5-1 % borax solution before planting cassava. |
|
|