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2015 ; 5
(ä): 15691
Nephropedia Template TP
gab.com Text
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English Wikipedia
The native ant, Tapinoma melanocephalum, improves the survival of an invasive
mealybug, Phenacoccus solenopsis, by defending it from parasitoids
#MMPMID26503138
Feng DD
; Michaud JP
; Li P
; Zhou ZS
; Xu ZF
Sci Rep
2015[Oct]; 5
(ä): 15691
PMID26503138
show ga
Mutualistic ants can protect their partners from natural enemies in nature.
Aenasius bambawalei is an important parasitoid of the the invasive mealybug
Phenacoccus solenopsis. We hypothesized that mutualism between native ants and
mealybugs would favor survival of mealybugs. To test this, we examined effects of
tending by the native mutualistic ant Tapinoma melanocephalum on growth of P.
solenopsis colonies on Chinese hibiscus, Hibiscus rosa-sinensis, in a field
setting. Ant workers with access to honeydew of mealybugs lived much longer than
those provisioned only with water in the laboratory, and number of ant workers
foraging increased significantly with growth of mealybug colonies in the field.
In later observations, there were significant differences in densities of
mealybugs between ant-tended and -excluded treatments. Survival rate of mealybugs
experiencing parasitoid attack was significantly higher on ant-tended plants than
on ant-excluded plants. When the parasitoid was excluded, there was no difference
in survival rate of mealybugs between ant-tended and -excluded plants. In most
cases, ants directly attacked the parasitoid, causing the parasitoid to take
evasive action. We conclude that native ants such as T. melanocephalum have the
potential to facilitate invasion and spread of P. solenopsis in China by
providing them with protection from parasitoids.