significance of seed borne diseases on crop production in bangladesh

SIGNIFICANCE OF SEED BORNE

DISEASES ON CROP PRODUCTION IN

BANGLADESH

OBJECTIVES

To know about the seed borne pathogen and seed

borne diseases of important economic crops.

To concern about the annual loss of crop production

by seed borne diseases.

To know about seed infection, their establishments

and seed borne plant infection.

To ensure about the seed health standard and field

health standard of notified seeds.

To know about the management or control of the seed

borne diseases.

SEED: Any plant part such as root ,stem,

leaf,bulb,rhizome etc.containing viable embryos

used as propagative unit or the fertilized

matured ovule constituting the genetic

potentiality capable of germination to produce

new plants for desired harvest is called seed.

SEED BORNE DISEASE

Any malfunctioning of host or plants

those results from continuous

irritation by a pathogenic agent which

are carried by seed and transferred to

the plants and leads to development

of symptoms are called seed borne

diseases.

LIST OF SEED BORNE DISEASES

DISEASES PATHOGEN

Black point of wheat Bipolaris sorokiniana

Brown spot of rice Bipolaris oryzae

Alternaria blight of mustard Alternaria brassicae

Leaf spot of wheat Alternaria tritica

Purple stain of soybean Cercospora kikuchi

Red rot of Sugarcane Colletotrichum falcatum

Black band of Jute Botryodiplodia theobromae

Anthracnose of jute Colletotrichum corchori

Stem rot of jute Macrophomina phaseolina

Seed Borne diseases of Rice

Brown Spot of Rice Grain Spot of Rice

Seed Borne diseases of Wheat

Black Point of Wheat

Seed Borne diseases of Jute

Anthracnose Stem end rot

Seed Borne diseases of Sugarcane

Red rot of Sugarcane

Seed Borne diseases of Lentil

Foot & Root Rot of Lentil

Diseased pulse Seed

Seed Borne diseases of Soybean

Purple stain of Soybean

Seed Borne diseases of Chilli

Anthracnose of Chilli

Seed Borne diseases of Bean

Anthracnose of Bean

ROLE OF UNHEALTHY SEED

Germination failure

seedling diseases

Adult plant infection

Inoculation of virgin soil

Introduction of new area

Foci of primary infection

Secure virulent physiologic races

Seed discoloration

Viability loss

Lower market value

LOSSES DUE TO SEED BORNE DISEASE

RICE

Germination failure Pathogen % loss

Curvularia lunata 37%

Fusarium sp. 13%

Field loss

Curvularia sp. 59.5%

Storage

Bipolaris oryzae 20-63%

Wheat Pathogen Loss

% germination Bipolaris sorokiniana 3.40%

Fusarium sp. 17-19.7%

Onion

% germination Alternaria porri 51%

Jute

% germination Macrophomina phaseolina Combined

Botryodiplodia theobromae 39.4%

Colletotrichum corchori

Yield loss

Wheat Bipolaris sorokiniana 14.97%

Sesame Macrophomina phaseolina 5-10%

Country bean Colletotrichum lindemuthinum 5%

THANKS TO ALL