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dc.contributor.authorNeuenschwander, P.
dc.date.accessioned2019-12-04T11:26:22Z
dc.date.available2019-12-04T11:26:22Z
dc.date.issued1994
dc.identifier.citationNeuenschwander, P. (1994). Control of the cassava mealybug in Africa: lessons from a biological control project. African Crop Science Journal, 2(4), 369-383.
dc.identifier.issn1021-9730
dc.identifier.urihttps://hdl.handle.net/20.500.12478/4570
dc.description.abstractDuring the Africa-wide Biological Control project, the neotropical parasitoid Epidinocarsis lopezi (De Santis) (Hymenoptera: Encyrtidae) was established in 26 African countries, causing a satisfactory reduction in the population density of the cassava mealybug Phenacoccus manihoti Mat.-Ferr. (Homoptera: Pseudococcidae) in most farmers' lields. Four conclusions concerning the possible application of the research results to other biological control projects are discussed. (1) Foreign exploration was intensive and should be maintained at this level in other projects, if necessary at the cost of other activities. (2) In the controversy about the amount of research needed before the lirst releases are made, understanding the proper role of quarantine is essential. While quarantine (preferably outside the continent) guarantees nonnoxiousness of natural enemies, only research in the experimental release sites can determine whether a given natural enemy will ·be efficient. The topic of how released exotic insects affect the diversity of the indigenous fauna is also addressed. Modalities used in this project for executing releases, always on request by and in collaboration with national programmes, are recommended for adoption in future projects. (3) Laboratory and field studies, sometimes leading to simulation models, established the scientific basis for quantifying the impact of the pest insect and its biological control. This was expressed as reduction in pest population levels and yield loss, as well as gain in revenue. Such studies are needed in order to attribute the observed effects to various causes and to advance the science of biological control. ( 4) It is concluded that biological control is the basis ofiPM but cannot usually be manipulated by the farmer. Interventions such as cultural methods or the use of resistant varieties need to be compatible with biological control. This is usually so~ unless resistances are very strong.
dc.description.sponsorshipInternational Development Research Centre
dc.description.sponsorshipDeutsche Gesellschaft für Internationale Zusammenarbeit
dc.description.sponsorshipAfrican Development Bank
dc.description.sponsorshipEuropean Union
dc.description.sponsorshipInternational Fund for Agricultural Development
dc.description.sponsorshipUnited Nations Development Programme
dc.language.isoen
dc.subjectBiological Control
dc.subjectPhenacoccus Manihoti
dc.subjectCassava
dc.subjectMealybugs
dc.titleControl of the cassava mealybug in Africa: lessons from a biological control project
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.coverage.regionAfrica
cg.coverage.regionWest Africa
cg.coverage.countryBenin
cg.authorship.typesCGIAR single centre
cg.iitasubjectCassava
cg.iitasubjectDisease Control
cg.iitasubjectPests Of Plants
cg.iitasubjectPlant Diseases
cg.accessibilitystatusLimited Access
local.dspaceid100820


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