Spatial Distribution of Nematode Population Densities and Nematode Damage in Roots of Three Banana Cultivars in Uganda
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Date
2000
Journal Title
Journal ISSN
Volume Title
Publisher
Nematropica
Abstract
The spatial distribution of nematode populations and damage in roots of Nabusa (
Musa
AAAgroup
‘Matooke’), Pisang Awak (
Musa
ABB) and Sukali Ndizi (
Musa
AB) three banana cultivars widely
grown in Uganda, was investigated at three locations, each with a distinctive nematode population
and composition. At Namulonge, central Uganda, where
Radopholus
similis
was the dominant nematode
species, and at Ntungamo, southwestern Uganda, where
Pratylenchus
goodeyi
was the dominant
species, suckers were removed from established mats and assessed for nematode reproduction and
damage. At Namulonge, Ntungamo, and Mbarara, southwestern Uganda, where
R.
similis
and
P
.
goodeyi
coexist, suckers removed three months after planting were assessed for nematode reproduction
and damage. Nematode population density distribution along the primary roots was observed to be
random for both plant types of the three cultivars at all locations. An exception was recorded for
three-month-old sucker-derived plants of all three cultivars at Mbarara, where higher
P
.
goodeyi
densities
were recorded closer to the corm. Nematode densities in primary roots, secondary roots, and
root tips were generally not significantly different for both plant types of a single cultivar except for
three month old sucker-derived Pisang Awak plants at Ntungamo where higher
Meloidogyne
spp. densities
were observed in the root tips. Consistently, nematode damage (root necrosis) was higher (
P
<
0.05) close to the corm than further along the primary roots, regardless of cultivar and location.
Description
Keywords
East African highland bananas, Helicotylenchus multicinctus, Meloidogyne spp., Nematode damage, Pratylenchus goodeyi, Radopholus similis, Root necrosis, Spatial distribution
Citation
Talwana, HA, Speijer, PR, & DeWaele, D. (2000). Spatial distribution of nematode population densities and nematode damage in roots of three banana cultivars in Uganda. Nematropica , 19-32.