loss of rice due blast disease

Blast Disease of Paddy: Symptoms, Causal Organism and Control Measures


blast of rice

Blast Disease of Paddy
(Symptoms, Casual Organism, Etiology and Control Measures)

loss of rice due blast diseasePaddy/rice

Rice is a cereal grain. It is the seeds of Oryza sativa (Asian rice) or Oryza glaberrima (African rice). Rice is the most extensively consumed staple food of human. It is the major staple food in Asia. Rice is the third highest agricultural commodity in worldwide production. The un-milled rice is known as “paddy“.

Blast Disease of Paddy

Ø  Blast disease is one of the most severe diseases affecting paddy.

Ø  It is a fungal disease prevalent all over the world.

Ø  It is a major problem in rice production in countries like Japan, India, Taiwan and the USA.

Ø  Blast disease is more severe in areas with high humidity and rainfall.

Ø  Losses due to the disease may be up to 90% of the total corp.

Ø  In India, the blast disease is more common in Southern parts, particularly coastal areas.

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vein clearing and vein banding

Mosaic Disease of Tapioca: Symptoms and Control Measures


mosaic disease of tapioca

Mosaic Disease of Cassava or Tapioca
(Cassava Mosaic Disease: Symptoms, Causal Organism, Etiology and Control Measures)

Cassava / Tapioca*

viral mosaic in leavesØ  Cassava or Tapioca (Botanical Name: Manihot esculenta; Family: Euphorbiaceae).

Ø  Cassava is a vegetatively propagated tuber crop plant.

Ø  The root tubers of tapioca are rich in starch.

Ø  Cassava is native to South America. Now the cassava is cultivated worldwide.

Ø  Cassava is a staple food in many regions for about 600 million people worldwide.

Ø  Linamarin is a cyanogenic glucoside found in the roots of cassava plants.

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