Cookies on Plantwise Knowledge Bank

Like most websites we use cookies. This is to ensure that we give you the best experience possible.


Continuing to use means you agree to our use of cookies. If you would like to, you can learn more about the cookies we use.

Plantwise Knowledge Bank

Your search results

Plantwise Factsheets for Farmers

Resistant or tolerant varieties against cassava bacterial blight

Xanthomonas campestris pv. manihotis
Democratic Republic of the Congo

Recognize the problem

Eight out of ten households cultivate cassava. It is a very important food crop in Africa and, unfortunately, it is affected by many diseases and pests. Vascular bacterial blight considerably reduces the yield, as well as the quality of the leaves. In the field, we see yellow to brown, dried, squarish spots, generally delineated by the veins. Between the leaf and the stem, there is usually a white gummy and sticky liquid that signifies the presence of bacteria. The tip of the plant rots away and the whole plant dies after the leaves fall.

Do not confuse this disease with bacterial necrosis, which has round spots, does not cause the leaves to fall off prematurely, and does not produce white liquid between leaves and stems.


This disease is caused by a bacteria that lives inside the plant, but cannot cross the vein boundaries. This disease is more active in the rainy season. It is possible to stop this disease from entering the field or spreading, by using resistant or tolerant varieties. These varieties will have the capacity to block the bacteria from entering, or even kill the disease if it enters the plant


Before planting seeds, seedlings or cuttings, make sure they are of one of the following varieties:
Lac Lomba

You should be able to get these seeds from your local certified seed dealer, or an approved nursery with:


Monitor the field once a week to check for disease. If there is an attack, contact your local agronomist, and go see the nursery to check that the seeds are the right ones for you to use.

The recommendations in this factsheet are relevant to: Democratic Republic of the Congo

Authors: Greg Mamba Mbayi
©CAB International. Published under a CC-BY-SA 4.0 licence.

Plantwise Factsheets Library app

Get all of the factsheets and pest management decision guides from this website in an offline format via the Plantwise Factsheets Library app.