common plant diseases in east africa acp302: plant disease ... · acp302: plant disease...

James W. Muthomi

Department of Plant Science and Crop Protection

University of Nairobi

ACP302: Plant Disease Epidemiology Dr. J. W. Muthomi Dept of Plant Science & Crop Protection, University of Nairobi

Common Plant Diseases in East Africa

ACP302:

PLANT DISEASE EPIDEMIOLOGY AND SEED HEALTH




Smut of maize



Northern leaf blight of maize Gray leaf spot of maize



Maize rust



Diplodia ear rot of maize



Gibberella ear rot of maize Aspergillus ear rot of maize



Gibberella stalk rot



Fusarium stalk rot of maize Diplodia stalk rot of maize



TMV on tobacco

Potato leaf roll Maize streak

TMV: http://www.apsnet.org/edcenter/intropp/lessons/viruses/Pages/TobaccoMosaic.aspx

Potato leaf roll: http://www.farminguk.com/news/Managing-virus-control-in-seed-potatoes_20642.html

Maize streak: http://www.agbioforum.org/v7n12/v7n12a02-thomson.htm

Maize lethal necrosis disease Maize streak



Stem rust of wheat

Leaf rust of wheat

Rice blast





Barley yellow dwarf virus



Angular leaf spot of bean Halo blight of bean



Common bacterial blight of cowpea and common bean



Bean anthracnose



Powdery mildew on cowpea

Bean rust



Rhizoctonia root rot

Sclerotinia rot on bean

Charcoal rot of bean Root rot of bean



Root rot of bean – above ground symptoms



Sclerotinia rot on soya bean and common bean



Fusarium wilt of pigeon pea

Cercospora leaf spot of pigeon pea



Alternaria leaf spot on groundnut



Cowpea mosaic



Bean mosaic



Cowpea severe mosaic Groundnut rosette Cowpea chlorotic mottle



Golden bean mosaic



Damping off of seedlings



Late blight of potato and tomato



Early blight of potato and

tomato



Fusarium wilt of tomato



Bacterial canker of tomato


Common Plant Diseases in East Africa Black rot of cabbage: http://www.extension.umn.edu/distribution/horticulture/DG1169.html;

http://www.infonet-biovision.org/default/images/105/pests

Bacterial wilt of potato: http://www.infonet-biovision.org/default/ct/79/pests

https://research.cip.cgiar.org/confluence/display/SET/Bacterial+Wilt+Protocol Bacterial wilt of potato



Blossom end rot of pepper and tomato Bacterial leaf blight of pepper



Black rot of cabbage: http://www.extension.umn.edu/distribution/horticulture/DG1169.html;

http://www.infonet-biovision.org/default/images/105/pests

Bacterial wilt of potato: http://www.infonet-biovision.org/default/ct/79/pests

https://research.cip.cgiar.org/confluence/display/SET/Bacterial+Wilt+Protocol

Black rot of cabbage

Alternaria leaf spot of cabbage



Downy mildew of cabbage

Powdery mildew of cabbage



Angular leaf spot on cucumber



Bacterial Soft Rot of pepper

http://www.omafra.gov.on.ca/IPM/images/peppers/diseases/bracterial_soft_rot/peppers_bacterial_soft_rot_green_zoom.jpg



Downy mildew

Purple blotch



TMV on tobacco

Potato leaf roll Maize streak

TMV: http://www.apsnet.org/edcenter/intropp/lessons/viruses/Pages/TobaccoMosaic.aspx

Potato leaf roll: http://www.farminguk.com/news/Managing-virus-control-in-seed-potatoes_20642.html

Maize streak: http://www.agbioforum.org/v7n12/v7n12a02-thomson.htm

Potato leaf roll



Tomato mottle virus

Tomato spotted wilt virus



Root knot nematode Root nodules



Coffee berry disease



Coffee leaf rust



Bacterial blight of cotton



Powdery mildew of grapes



Downy mildew of grapes



Bortytis rot on grape



Sigatoka leaf spot of banana



Banana Xanthomonas wilt



Fusarium wilt (Panama disease) of banana



Anthracnose fruit rot



Powdery mildew of mango



Citrus canker



Citrus greening disease



Papaya ring spot virus



Powdery mildew of roses



Crown gall of roses



Burrowing nematodes on banana



Bacterial blight of cassava



Cassava mosaic disease



Cassava brown streak disease

Flowering stage Highly susceptible

Pinhead stage Resistant

Soft, green expanding berries Highly susceptible

Mature, green berries Resistant

Cherry ripe berries Highly susceptible

Susceptibility of coffee growth stages to coffee berry disease

common plant diseases in east africa acp302: plant disease ... · acp302: plant disease...

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