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Evolution and InnovationSave Biodiversity...Rise

Chillis

CHILLI PESTS :

Crop: Chilli
Scientific name:Capsicum annum
Family: Solanaceae
Chilli thrips: Scirtothrips dorsalis

Symptoms of damage:

  • The infested leaves develop crinkles and curl upwards
  • Elongated petiole
  • Buds become brittle and drop down
  • Early stage, infestation leads to stunted growth and flower production, fruit set are arrested

Identification of pest:

  • Nymph: Are small, linear, easily fragile abdomen with straw yellow colour
  • Adult: Fringed wings
Chilli thrips infestation - upward curling Adult

Management:

  • Inter crop with agathi (Sesbania grandiflora) to provide shade which regulate the thrips population
  • Do not grow chilli after sorghum
  • Do not follow chilli and onion mixed crop
  • Sprinkle water over the seedlings to check the multiplication of thrips
  • Treat seeds with imidacloprid 70% WS @ 12 g/kg of seed
  • Apply carbofuran 3% G @ 33 kg/ha or phorate 10 % G  @ 10 kg/ha or
  • Spray any one of the following insecticide
Insecticide Dose
Imidacloprid 17.8 % SL 3.0 ml/10 lit.
Dimethoate 30 % EC 1.0 ml/lit.
Emamectin benzoate 5 % SG 4 g/10 lit.
Ethion 50 % EC 2.0 ml/lit.
Fipronil 5 % SC 1.5 ml/lit.
Oxydemeton –Methyl 25 % EC 1.0 ml/lit.
Phosalone 35 % EC 2.0 ml/lit.
Spinosad 45 % SC 3.2 ml/10 lit.
Thiacloprid 21.7 % SC 6.0 ml/10 lit.
Green peach aphid: Myzus persicae

Symptoms of damage:

  • The infested plants turn pale with sticky appearance
  • The leaves curled and crinkled
  • Honeydew excrete - development of sooty mould
  • Stunted growth of the plant
Green peach aphid infestation - Crinkling

Identification of pest:

  • Nymphs: Initially are greenish, but soon turn yellowish
  • Adults: yellowish green in colour

 

Management:

  • Treat seeds with imidacloprid 70% WS @12 g/kg of seed
  • Apply phorate 10 % G @10 kg/ha
  • Spray any one of the following insecticide
Nymphs Adult
Insecticide Dose
Carbosulfan 25 % EC 1.0 ml/lit.
Fipronil 5 % SC 1.0 ml/lit.
Imidacloprid 17.8 % SL 3.5 ml/10 lit.
Oxydemeton –Methyl 25% EC 1.6 ml/lit.
Phosalone 35 % EC 2.0 ml/lit.
Quinalphos 25 % Gel 1.0 ml/lit.
Quinalphos 25 % EC 1.0 ml/lit.

Tobacco cutworm: Spodoptera litura

Symptoms of damage:

  • Newly hatched larvae scrap the green matter in the leaf
  • Affected leaf looks like a papery white structure
  • Later instar larvae feed by making small holes
  • In severe infestations they feed voraciously on the entire lamina and petiole

Identification of pest:

  • Egg: Eggs are golden yellow, laid in masses and covered by silky hairs.
  • Larva: Are seen in groups, young caterpillars are light green with black head or black spots
  • Adult: Are brown in colour. Forewings are brown colour with wavy white markings, hind wings are white colour with a brown patch along the margin.

 

Larva Pupa
Management:
  • Plough the soil to expose and kill pupae
  • Castor as a trap crop
  • Set up pheromone trap @15/ha
  • Collect and destroy the egg masses, gregarious larvae and grown up caterpillars
  • Spray SINPV @ 1.5x1012 POB/ha in evening hour
  • Spray any one of the following insecticides
Insecticide Dose
Emamectin benzoate 5 % SG 4 g/10 lit.
Flubendiamide 20 WDG 6.0 g /10 lit.
Indoxacarb 14.5 % SC 6.5 ml/10 lit.
Novaluron 10 % EC 7.5 ml/10 lit.
Spinosad 45 % SC 3.2 ml/10 lit.
Thiodicarb 75 % WP 2.0 g/lit.

Gram caterpillar: Helicoverpa armigera

Symptoms of damage:

  • Early instar feeds on foliage
  • Grown up larvae mainly bore into the fruits.

Identification of pest:

  • Eggs: Are spherical in shape and creamy white in colour, laid singly
  • Larva: Shows colour variation from greenish to brown
  • Pupa: Brown in colour, occurs in soil, leaf, pod and crop debris
  • Adult: Female is brownish yellow stout moth, Male is light greenish in colour with “V” shaped markings.

Management:

  • Collect and destroy the infected fruits and grown up larvae
  • Setup pheromone trap with Helilure at 15/ha
  • Six releases of Trichogramma chilonis @50,000/ha per week coinciding with flowering time
  • Release Chrysoperla carnea at weekly interval at 50,000 eggs or grubs / ha from 30 DAS.
  • Spray HaNPV at 1.5x1012 POB/ha along with cotton seed oil 300 g/ha to kill larvae.
  • Spray carbaryl 50 WP 2 g/lit or B. thuringiensis 2 g/lit
  • Provide poison bait with carbaryl 1.25 kg, rice bran 12.5 kg, jaggery 1.25 kg and water 7.5 lit/ha or spray any one of the following insecticide
  • Spray any one of the following insecticides
Larva 
Adult
Insecticide Dose
Emamectin benzoate 5 % SG 4 g/10 lit.
Flubendiamide 20 WDG 6.0 g /10 lit.
Indoxacarb 14.5 % SC 6.5 ml/10 lit.
Novaluron 10 % EC 7.5 ml/10 lit.
Spinosad 45 % SC 3.2 ml/10 lit.
Thiodicarb 75 % WP 2.0 g/lit.

 
Yellow mite or muranai mite: Polyphagotarsonemus latus
Symptoms of damage:
  • Downward curling and crinkling of leaves
  • Leaves with elongated petiole
  • Stunted growth

Identification of pest:

  • Egg: Oval shaped eggs and white in colour
  • Nymphs: white in colour
  • Adult: Large, oval and broad and yellowish in colour

 

Yellow mite - Adult Yellow mite infestation - downward curling of leaves
Management:
  • Encourage the activity of predatory mite: Amblyseius ovalis
  • Apply phorate 10 % G @10 kg/ha or spray any one of the following insecticide

 

Insecticide Dose
Buprofezin 25 % SC 8.0 ml/10 lit.
Chlorfenapyr 10 % SC 1.5 ml/lit.
Diafenthiuron 50 % WP 8.0 g/10 lit.
Dimethoate 30 % EC 1.0 ml/lit.
Ethion 50 % EC 2.0 ml/lit.
Fenazaquin 10 % EC 2.0 ml/lit.
Fenpyroximate 5 % EC 1.0 ml/lit.
Hexythiazox 5.45 % EC 8.0 ml/10 lit.
Milbemectin 1 % EC 6.5 ml/10 lit.
Oxydemeton –Methyl 25 % EC 2.0 ml/lit.
Phosalone 35 % EC 1.3 ml/lit.
Propargite 57 % EC 2.5 ml/lit.
Quinalphos 25 % EC 1.5 ml/lit.
Spiromesifen 22.9 % SC 5.0 ml/10 lit.


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