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Host stage selection and sex allocation behaviors by Anagyrus mangicola Noyes were studied in choice and no-choice experiments in the laboratory. All host instars of the mango mealybug (MM), Rastrococcus invadens Williams (Hem., Pseudococcidae), were parasitized. First instars were less often enc...


Bokonon-Ganta, A.H.Neuenschwander, P.Vanalphen, J.J.M.Vos, M.[Host stage selection and sex allocation by Anagyrus mangicola (Hymenoptera: encyrtidae), a parasitoid of the mango mealybug, Rastrococcus invadens (Homoptera: pseudococcidae)]Host stage selection and sex allocation by Anagyrus mangicola (Hymenoptera: encyrtidae), a parasitoid of the mango mealybug, Rastrococcus invadens (Homoptera: pseudococcidae)

The parasitoid Gyranusoidea tebygi Noyes was released in West Africa against the mango mealybug, Rastrococcus invadens Williams, a pest that invaded Africa in the early 1980s. The ability of G. tebygi to control the mango mealybug was assessed in mango trees using paired sleeve cages. In sleeve c...


Boavida, C.Neuenschwander, P.Herren, H.[Experimental assessment of the impact of the introduced parasitoid Gyranusoidea tebygi Noyes on the mango mealbug Rastrococcus invadens Williams, by physical exclusion]Experimental assessment of the impact of the introduced parasitoid Gyranusoidea tebygi Noyes on the mango mealbug Rastrococcus invadens Williams, by physical exclusion

The spatial dispersion pattern and the intracanopy distribution of the mango mealybug, Rastrococcus invadens Williams, were assessed during one year in a small mango plantation, in order to develop sampling plans and facilitate sampling in mango trees. Mean number of mango mealybugs per leaf diff...


Boavida, C.Neuenschwander, P.Schulthess, F.[Spatial distribution of Rastrococcus invadens Williams (Hom., Pseudococcidae) in mango trees]Spatial distribution of Rastrococcus invadens Williams (Hom., Pseudococcidae) in mango trees

The competition between Gyranusoidea tebygi Noyes and Anagyrus mangicola Noyes (both Hymenoptera: Encyrtidae), exotic parasitoids of the mango mealybug, Rastrococcus invadens Williams (Homoptera: Pseudococcidae) was studied in the laboratory. No significant differences were found in the way each ...


Bokonon-Ganta, A.H.Alphen, J.J.M. vanNeuenschwander, P.[Competition between Gyranusoidea tebygi and Anagyrus mangicola, parasitoids of the mango mealybug, Rastrococcus invadens: interspecific host discrimination and larval competition]Competition between Gyranusoidea tebygi and Anagyrus mangicola, parasitoids of the mango mealybug, Rastrococcus invadens: interspecific host discrimination and larval competition

Techniques for evaluating biological control of cassava mealybug (Phenacoccusmanihoti Matile-Ferrero), mango mealybug (Rastrococcus invadens Williams), and spiralling whitefly (Aleurodicus dispersus Russell) are described. In each case, two exotic hymenopterous parasitoids were introduced. Alone ...


Neuenschwander, P.[Evaluating the efficacy of biological control of three of three exotic homopteran pests in Tropical Africa]Evaluating the efficacy of biological control of three of three exotic homopteran pests in Tropical Africa

Life history traits of the mango mealybug, Rastrococcus invadens Williams, were compared between two neighboring mango trees (Mangifera indica L.), one of which was heavily infested and the other slightly infested. On the infested tree, mealybug survival was high because of good feeding condition...


Boavida, C.Neuenschwander, P.[Influence of host plant on the mango mealybug, Rastrococcus invadens]Influence of host plant on the mango mealybug, Rastrococcus invadens

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