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Evolution and InnovationSave Biodiversity...Rise

Gladiolus




Crop: Gladiolus

S.N:Gladiolus spp

Family: Iridaceae

Pests

GLADIOLUS MAJOR PESTS & INSECTS :

1. Gladiolus thrips,  Thrips simplex

Symptom of damage

 
  • Deformities and discolouration of gladiolus flowers and corms (bulbs)
  • Attacked- buds and flowers remain closed or open irregularly. 
  • Infested surfaces show whitish grey glistening.

Identification of the pest

  • Egg - opaque white, smooth and bean shaped, deposited in the leaf tissue and corms.  
  • Adult - milky-white which later turn brown
  • Wings have a light transverse band near the base. 
Adult - Thrips tabaci

 

2. Honey suckle thrips  Thrips flavus 

Symptom of damage

 
  • Nymphs and adults feed on the blossoms which shrivell and become dark.
  • Nymphs are white to pale yellow in colour. 

Identification of the pest

 
  • Adults - yellow to orange in colour. 
  • Legs and forewings are yellow to pale yellow. 

 

3. Flower thrips,  Frankliniella spp. 

Symptom of damage

 
  • Flower thrips often invade gladiolus and damage the florets.

Management for thrips

 
  • Spray methyl demeton 25 EC or dimethoate 30 EC @ 2 ml/l. of water.
  • Spraying of malathion 50 EC @ 1.25 ml/l or carbaryl 50 WP @ 2g/l of water before the bud initiation.
  • Spikes may be sprayed with methyl parathion 50 EC @ 1ml/l l of water
  • ( flower emergence period)

 

4. Mirid bug,  Lygus lineolaris 

Symptom of damage
  • Bugs - puncture the terminal shoot below the flower bud and inject toxic saliva
  • Flower drop occurs
Identification of the pest
  • Nymphs are greenish. 
  • Adult bugs are mottled yellowish or reddish brown with flat, oval bodies
Adult Mirid bug,  Lygus lineolaris

 

Management
  • Destroy the weeds in the vicinity of the crop.
  • Spray dimethoate 30 EC or  methyl demeton 25 EC 2ml/lit of water before flowering.
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