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Agritech Archive

Production · Protection · Nutrients · Water
In here
1,513 crop protection pages, pest and disease by crop•98 crops tagged — rice, cotton, sugarcane, mango and more•261 nutrient management pages, deficiency symptoms and correction measures•3,462 data tables preserved from the source pages

Symptoms

Sesame
Symptoms Small, circular reddish-brown spots with concentric rings on leaves Dark brown lesions on petioles, stem and capsules Blighting of leaves and defoliation Splitting of capsules and shrivelled seeds Identification of pathogen Conidiophore : Occasionally in groups Conidia : Obclavate and light olive in colour in chains Favourable Conditions High atmospheric humidity (85-90%) and low temperature (16-20ºC). Mode of Spread and Survival Survive on Jatropha pandurifolia and Bridelia hamiltoniana. Primary spread: Externally and internally seed borne. Secondary spread: Wind-borne conidia. Management Remove the reservoir host periodically Avoid closer spacing. Spray mancozeb at 1000 g/ha.
  • Small, circular reddish-brown spots with concentric rings on leaves
  • Dark brown lesions on petioles, stem and capsules
  • Blighting of leaves and defoliation
  • Splitting of capsules and shrivelled seeds

Identification of pathogen

  • Conidiophore : Occasionally in groups
  • Conidia : Obclavate and light olive in colour in chains

Favourable Conditions

High atmospheric humidity (85-90%) and low temperature (16-20ºC).

Mode of Spread and Survival

  • Survive on Jatropha pandurifolia and Bridelia hamiltoniana.
  • Primary spread: Externally and internally seed borne.
  • Secondary spread: Wind-borne conidia.
  • Remove the reservoir host periodically
  • Avoid closer spacing.
  • Spray mancozeb at 1000 g/ha.