Population dynamics of Aceria guerreronis (Acari: Eriophyidae) and its predatory mite, Neoseiulus baraki (Acari: Phytoseiidae) in two coconut growing areas in Sri Lanka

AbstractThe simultaneous infestation of a plant by several species of herbivores may affect the attractiveness of plants to the natural enemies of one of the herbivores. We studied the effect of coconut fruits infested by the pestsAceria guerreronisandSteneotarsonemus concavuscutum, which are generally found together under the coconut perianth. The predatory miteNeoseiulus barakiproduced lower numbers of offspring on fruits infested withS. concavuscutumand on fruits infested with both prey than on fruits withA. guerreronisonly. The predators were attracted by odours emanating from coconuts withA. guerreronis, but not by odours from coconuts withS. concavuscutum, even whenA. guerreroniswere present on the same fruit. FewerN. barakiwere recaptured on fruits with both prey or withS. concavuscutumthan on fruits with onlyA. guerreronis. Furthermore, the quality ofA. guerreronisfrom singly and multiply infested coconuts as food forN. barakidid not differ. Concluding, our results suggest thatN. barakidoes not perform well whenS. concavuscutumis present on the coconuts, and the control ofA. guerreronisbyN. barakimay be negatively affected by the presence ofS. concavuscutum.

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Season- and fruit age-dependent population dynamics of Aceria guerreronis and its associated predatory mite Neoseiulus paspalivorus on coconut in Benin

Biological Control ◽

10.1016/j.biocontrol.2010.06.007 ◽

2010 ◽

Vol 54 (3) ◽

pp. 349-358 ◽

Cited By ~ 17

Author(s):

Koffi Negloh ◽

Rachid Hanna ◽

Peter Schausberger

Keyword(s):

Population Dynamics ◽

Predatory Mite ◽

Aceria Guerreronis ◽

Age Dependent

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Limitations of Neoseiulus baraki and Proctolaelaps bickleyi as control agents of Aceria guerreronis

Experimental and Applied Acarology ◽

10.1007/s10493-012-9515-3 ◽

2012 ◽

Vol 56 (3) ◽

pp. 233-246 ◽

Cited By ~ 30

Author(s):

Debora B. Lima ◽

José Wagner da Silva Melo ◽

Manoel G. C. Gondim ◽

Gilberto J. De Moraes

Keyword(s):

Aceria Guerreronis ◽

Neoseiulus Baraki

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Population dynamics of the coconut caterpillar, Opisina arenosella Walker (Lepidoptera: Xyloryctidae), in Sri Lanka

Bulletin of Entomological Research ◽

10.1017/s0007485300013237 ◽

1988 ◽

Vol 78 (3) ◽

pp. 479-492 ◽

Cited By ~ 8

Author(s):

P. A. C. R. Perera ◽

M. P. Hassell ◽

H. C. J. Godfray

Keyword(s):

Population Dynamics ◽

Sri Lanka ◽

Dynamics Analysis ◽

Triggering Mechanism ◽

Working Hypothesis ◽

Opisina Arenosella ◽

Population Outbreaks ◽

Pupal Parasitism ◽

Generation Period

AbstractOpisina arenosella Walker is a defoliating pest of coconut in Sri Lanka. A first attempt was made to understand its population dynamics. Analysis of records of population outbreaks throughout the country from 1965 to 1985 revealed cycles in the population of approximately one generation period, giving the population the appearance of partially discrete generations. There was also evidence for longer cycles of six-month period. Outbreaks occurred throughout the coconut-growing regions of Sri Lanka, and the numbers of outbreaks per year in different provinces were sometimes correlated, indicating a common, probably climatic, triggering mechanism. Parasitism remained high throughout the outbreaks and there was some evidence that pupal parasitism increased towards the end of an outbreak. A working hypothesis that explains the population dynamics of O. arenosella and the origin of outbreaks is presented.

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