PLANT PATHOLOGY :- Disease of Field Crops and Their Management

 Bajra

1. Downy mildew of bajra

downy mildew of bajra

downy mildew of bajra

Downy mildew of bajra

Disease - Downy mildew

C.O. - Sclerospora graminicola

2. Smut of Bajra

Smut of bajra

Photo - courtesy of ICRISAT

Disease - Smut of bajra
C.O. - Tolyposporium penicillariae

The pathogen infects the florets and transform them into large plump sori (sacs) containing black powder(smut pores). When young the sori are larger and greener then the non infected developing seeds, and they remain green when the normal seeds become creamy or grey coloured. As the sori mature they become dark brown and are easily broken, spilling out millions of black smut spore balls.

3. Ergot of Bajra

ergot of bajra

Photo : courtesy of ICRISAT

Disease - Ergot of bajra
C.O. - Claviceps fusiformis




4. Leaf blast of Bajra

Leaf blast of bajra

Disease - Blast of bajra

C.O. - Pyricularia setariae



5. Rust of Bajra

Photo - courtesy of ICRISAT

Disease - Rust of Bajra

C.O. - Puccinia penniseti

 Maize

1. Charcol rot of Maize

Charcol rot of maize

Disease - Charcol rot of maize
C.O. - Macrophomina phaseolina




2. Maydis leaf blight of maize

maydis leaf blight of maize

Maydis leaf blight of maize

Disease - Maydis leaf blight

C.O. - Helminthosporium maydis



3. Turcicum Leaf Blight

Disease - Turcicum leaf blight

C.O. - Helminthosporium turcicum

Per. Stage - Trichometasphaerica turcicum

 Paddy

1. Bacterial blight of paddy

bacterial leaf blight of paddy.

bacterial leaf blight of paddy..

bacterial leaf blight of paddy...

Disease : Bacterial Leaf Blight of Paddy

C.O : Xanthomonas oryzae pv. oryzae

2. Khaira disease

Khaira disease of paddy

Cause : Due to Zinc deficiency in soil or non-availability of Zinc to plants.

3. False smut of paddy

False smut of paddy

False smut of paddy

Disease : False smut of Paddy/ Green smut

C.O. : Ustilaginoidea virens

4. Blast of paddy

blast of paddy

Disease : Blast of paddy

C.O. : Pyricularia grises

Per. Stage : Magnaporthe grisea

 Tobacco

1. Tobacco leaf curl

tobacco leaf curl 

2. TMV

TMV 

TMV

3. Cercospora/ Frog eye leaf spot

Cercospora/Frog eye  leaf spot

Cercospora/Frog eye  Leaf spot

Sorghum

1. Striga (witch weed)

striga

2. Anthracnose of sorghum

Anthracnose of sorghum

 Castor

1. Wilt of castor

initial wilt

partial wilt

symptoms of wilt

Wilt of castor

2. Root rot of castor

root rot of castor

3. Cercospora leaf spot of castor

Cercospora leaf spot of castor

 Groundnut

1. Early leaf spot 

Early leaf spot of groundnut

early leaf spot of groundnut

Disease : Early leaf spot of Groundnut

Causal organism : Cercospora arachidicola

Perfect stage : Mycosphaerela arachidicola

2. Late leaf spot 

late leaf spot of groundnut

Disease : Late leaf spot of Groundnut
C.O. : Cercosporidium personatum



3. Rust of Groundnut

Photo - courtesy of ICRISAT

Disease - Rust of Groundnut
C.O. - Puccinia arachidis




4. Seedling blight

seedling blight of g'nut

Disease : collar rot/ crown rot / seedling Blight
C.O. : Aspergillus niger

5. Phyllosticta leaf spot of groundnut

Photo - courtesy of ICRISAT

6. Alternaria leaf Blight

Wheat

1. Wheat ear cockle

Disease : Ear cockle/ Tundu disease 

C.O. : Combined action by,

Nematode- Anguina criticism

Bacteria- Clavibacter tritici

Sugarcane

1. Red rot of sugercane

 

Disease : Red rot

C.O. : Colletotrichum falcatum

Per. Stage : Glomerella tucumanensis

2. Sugarcane whip smut

Disease : Whip smut/ Culmiculous smut

C.O. : Ustilago scitaminea

Cotton

1. Root rot of cotton

Disease : Root rot

C.O. : Rhizoctonia bataticola (Tamb) Butl.

Per. Stage : Thanetophorus cucumeris

2. Wilt of cotton

Disease : Wilt

C.O. : Fusarium oxysporum f. Sp. Vasinfectum

3. Angular leaf spot

angular leaf spot

Disease : Angular leaf spot

C.O. : Xanthomonas campestris pv. malvacearum

Greengram

1. Anthracnose of Greengram 

Anthracnose of Greengram 

Disease : Anthracnose of Greengram 

C.O. : Colletotrichum lindemuthianum

2. Powdery mildew of Greengram

Disease : Powdery mildew 

C.O. : Erysiphe polygoni