Ex. No.17          Study of Physiogenic diseases

Physiogenic / Physiological disorders / non parasitic diseases / Abiotic diseases / Nutritional disorders                                                           The plants are producing symptoms due to macro micro nutrient deficiencies and environmental characters. Such diseases are called as Non parasitic diseases.              

Disease name	Causal agent / deficiency			Symptoms
Khaira or Khera disease of rice (Y.L.Nene)			Zn	Affected leaf area become papery, necrotic and entire mass of leaves become collapses
Red leaf of cotton, Chlorosis in rice			N
Marginal drying of Banana	K
Citrus Mottling or Foliocellosis	Zn deficiency			Green chlorotic mottling
Blossom end rot of tomato	Calcium & High Temp.			Marginal Chlorosis
Wither tip of flax	Ca
Wither tip of apple, Citrus Exanthema	Cu
Whiptail of cauliflower	Molybdenum
Black tip of mango	near brick kilns			---
Black heart of potato	Unfavourable oxygen conditions				----
Green netting of citrus	Iron
Sand drown of tobacco	Mg
Brown heart of Turnip , Top sickness of tobacco		Boron
Little leaf of apple	Zn
Pahala blight of sugar cane	Mn

My dear students
Total number of exercises are 17