Integrated Pest Management

Zinc Deficiency

Symptoms

• Symptoms appear after 10 days of germination.
• Necrotic spots (brown) at the tip of cotyledonary leaves appear.
• The chocolate brown spots appear on older leaves.
• Later on affected leaves get shed.
• New leaves are small in size.

Remedies

• If zinc deficiency is noticed in standing crop then 0.5% foliar spray of zinc sulphate is recommended thrice at an interval of 10-15 days.
• Apply Zinc Sulphate 25 kg/ha in light soils and 50 kg/ha in heavy soils once in 3-4 years.

Resources

• THE ZINC CONTENT OF VARIOUS COMPOUNDS ARE:
  Zinc Sulphate: 22 - 35 %
  Zinc Chelate NaZnHEDTA 09%

  Top

Sulphur Deficiency

Symptoms

• Shortening of internodes.
• Stunting of Growth
• Appearance of many lateral branches giving bushy appearance.
• Length of petiole is reduced.
• Leaf margins curl inward and turn necrotic.
• Young leaves are severely chloritic.

Remedies

• In sulphur deficient soils use single super phosphate and ammonium sulphate.
• Apply 20 - 40 kg Sulphur per hectare depending upon the soil type.
• For light soils 20 kg/ha.
• For heavy soils 40 kg/ha

Resources

• THE SULPHUR CONTENTS OF VARIOUS COMPOUNDS ARE:
  Ammonium sulphate 24% S
  Single Super Phosphate 12% S
  Elemental sulphur 80-100% S
  Gypsum 13-18% S

  Top

Boron Deficiency

Symptoms

• The symptoms are very similar to Zn deficiency symptoms.
•  Dull yellow colour develops in the intervenial portions of older leaves.

Remedies

•  No remedial measures known.

Resources

• Boron tolerant varieties should be taken.

  Top