SUPERELONGATION DISEASE OF CASSAVA CAUSED BY Elsinoe brasiliensis

 

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Publication Date

Sat, 24 Sep 2016, 04:31

Last Updated

Sept. 24, 2016, 4:31 a.m.

Report Number

TTO-08/2

Country

Trinidad and Tobago

Pest Id

Elsinoe brasiliensis - (SPHAMA)

Report Status

Preliminary

Hosts

Cassava (Manihot esculenta)

Pest Status (old values from ISPM 8 -1998 )

• Present: in all parts of the area

Pest Status (ISPM 8 - 2021)

• Present: widely distributed

Geographical Distribution

The disease was found in all counties of Trinidad and was more severe in central and southern areas.

Summary

Cassava (Manihot esculenta) is the second staple crop of economic importance after rice that is cultivated in Trinidad and Tobago. Superelongation disease (SED) was first reported to occur in Trinidad in 2008. The symptoms of this disease include raised, reddish brown to tan-coloured corky leisons on the petioles and mid-ribs of leaves and stems as well as chlorotic spots with necrotic centres on leaves. Leisions on the veins and mid-ribs are lens-shaped and appear on the lower surface of the leaves. Leaves appear noticeably twisted and partially curled upwards during the rainy season. Elongation of the internodes is reported in the literature for this disease, were not observed in Trinidad. However, during the surveys conducted, symptoms of mild elongation of the internodes have been observed on a few cassava fields in Trinidad. Superelongation disease of cassava is caused by the fungus Elsinoe brasiliensis. It is a splashborne disease and can be spread by infected planting material.

Danger

Reduced yield in crop

Contact for info

Anthony St. Hill Research Division Central Experiment Station Caroni Northbank Road Centeno via Arima P.O. Trinidad & Tobago [email protected]

Report files

En

Website

Issue keywords

Pest reporting Pest status:Absent/Absence

Commodity keywords

Roots and tubers of manioc, arrowroot, salep, Jerusalem artichokes, sweet potatoes and similar roots and tubers with high starch or inulin content, fresh, chilled, frozen or dried, whether or not sliced or in the form of pellets; sago pith