Biocontrol Science and Technology (1995) 5, 95-107

A.H. Bokonon-Ganta and P. Neuenschwander (1995)
Impact of the biological control agent Gyranusoidea tebygi Noyes (Hymenoptera: Encyrtidae) on the mango mealybug, Rastrococcus invadens Willams (Homoptera: Pseudococcidae), in Benin
Biocontrol Science and Technology 5 (1), 95-107
Abstract: The distribution of Rastrococcus invadens among different host plants and the impact of the mealybug on mango growth were investigated on 2067 trees in three surveys across all ecologiacal zones if Benin. The first survey started in 1989, less than 1 year after the first release of the exotic parasitoid Gyranusoidea tebygi. Within 3 years, G. tebygi had colonized the entire area of infestation, and was found on practically all infested mango trees as well as other infested host plants. By 1991 the incidence of R. invadens on the secondary host plants had declined significantly. The percentage of infested mago trees delined from 31% in 1989 to 17% in 1991, highest populations being found in the coastal savannah. During the same period the mean percentage pf infested mango trees having indigenous predators declined from 42 to 21%.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Peter Neuenschwander, Aimé H. Bokonon-Ganta

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
damage/losses/economics
Research topic(s) for beneficials or antagonists:
population dynamics/epizootiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rastrococcus invadens	Mango (Mangifera indica)	Benin
Gyranusoidea tebygi (parasitoid)	Rastrococcus invadens	Mango (Mangifera indica)	Benin