Slippery skin disease of onion

Causal Agent: Burkholderia gladioli pv. alliicola (syn. Pseudomonas gladioli pv. alliicola)

Bacterial Soft Rot disease of onion

Scientific Name: Pectobacterium carotovorum subsp. carotovorum (syn. E. carotovora subsp. carotovora)

Boron Deficiency in sesamum

Symptoms

• Boron deficient plants appear severely stunted within two weeks.

Sulphur Deficiency in sesamum

Symptoms

• The growth of the plant is retarded.
• Leaf size is reduced. Initially, the fully emerged young leaves turn pale.

Zinc Deficiency in sesamum

Symptoms

• Middle leaves show inter-veinal discolouration of the basal part and necrosis along the apical margins followed by the appearance of small buff coloured irregular areas.

Molybdenum Deficiency in sesamum

Symptoms

• Plants develop yellowing and scorching of margins of old leaves.
• Yellowing gradually spreads to the interveinal areas which become dry and papery.

Copper Deficiency in sesamum

Symptoms

• Growth of plant is depressed from the seedling stage.
• Apical part of the young and middle leaves of plants turn chlorotic.

Wilt

Causal Organism: Cephalosporium sacchari

Class: Deuteromycetes

Order: Moniliales

Name of Disease: Brown spot.

Cause:    Cochliobolus miyabeanus (Ito & kur.) Drech ex Dast.

 Helminthosporium  oryzae  (Breda de Haan.)