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Horticultural crops :: Spices:: Pepper

  1. Phytophthora foot rot / quick wilt – Phytopthora capsici
  2. Slow decline / slow wilt: Fusarium, Rhizoctonia and Diplodia
  3. Anthracnose / Pollu disease – Gloeosporium gloeosporioides
  4. Stump rot – Rosellonia deusta

1.Phytophthora foot rot / quick wilt – Phytopthora capsici.

Symptoms:

a. Die back:

  • The aerial branches get infected at any point. At the site of infection of branch, the discoloration occurs and rotting progress upwards and downwards resulting in die-back symptoms.
  • The lateral branches of the affected vines break off at the nodes and fall off.

b. Foot rot or Collar rot:

  • The stem near the ground level get infected and the rotting and death of vine occurs within 2-3 weeks.
  • The affected portion emits bad odour. The necrosis progress down wards to the underground stem and to the root system.

c. Root rot:

  • The infection starts at main root or at feeder root. The leaves become yellow and defoliate.

Management:

  • Selection of healthy nursery material.
  • Provide good drainage.
  • Soil drenching with 1% Bordeaux mixture after removal of the affected plant.
  • Spraying with 1% Bordeaux mixture (or) COC 0.25% (or) Alitte 0.3%
  • Soil application of neem cake and Trichoderma viride or P. fluorescens

2. Slow decline / slow wilt: Fusarium, Rhizoctonia and Diplodia along with nematode infection.

Symptoms

  • General yellowing of lower leaves which progress upwards.
  • The affected leaves become flaccid and fall off.
  • Tip burn of leaves and die-back of twigs appear. Root knot, can be seen in the vine showing the yellowing of leaves. The affected vines gradually die.
  • Vascular browning can be seen.

Management:

  • Soil drenching with Copper oxychloride in May – June and September – October.

3. Anthracnose / Pollu disease – Gloeosporiumgloeosporioides

Symptoms:

  • Symptoms appear in leaves and stems. Circular or irregular grey spots appear in the leaves.
  • Concentric rings of acervuli appear on upper surface of the leaves. On the stem the infection appear at the tips spreads downwards and kill the entire vine.
  • When infections occur in leaf axils the spikes become affected and fall off.
  • Berry becomes brown in colour and extends downwards from upper portion.  And become chaffy (Pollu means hallow thing)

Management:

  • Three rounds of spray with Bordeaux mixture 1%

4. Stump rot – Rosellonia deusta

Phtyophthora Photo Collage

Symptoms

  • Pepper vines die in patches of 5-15 meter square scattered in the plantation.
  • The fungus attacks the roots as brown strand mixed with soil.
  • Leaves turn yellow and fall off and the plant dries up.

Management:

  • Soil drenching with 0.25% Copper oxychloride.

 

 


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