Introduction of parasitoids for the control of the cassava mealybugPhenacoccus herreni(Hemiptera: Pseudococcidae) in north-eastern Brazil

Author:

Bento J.M.S.,de Moraes G.J.,Bellotti A.C,Castillo J.A.,Warumby J.F.,Lapointe S.L.

Abstract

AbstractThe mealybugPhenacoccus herreniCox & Williams causes considerable damage to cassavaManihot esculentaCrantz. Field surveys conducted between 1988 and 1994 indicated the mealybug was present in 57 municipalities in six States in north-eastern Brazil, in some places reaching high levels of infestation. Several native natural enemy species were found associated with the pest in Brazil. Exotic encyrtid parasitoids were imported and released in fields in the States of Bahia and Pernambuco.Apoanagyrus diversicornis(Howard) was introduced from Colombia, andAcerophagus coccoisSmith, andAenasius vexans(Kerrich) were introduced from Venezuela. By the end of 1996, a total of 35,930 parasitoids had been released. In Bahia,Apoanagyrus diversicorniswas recovered 130, 234, 304 and 550 km from its release site after 6, 14, 21 and 33 months, respectively.Acerophagus coccoiswas recovered at 180 km from its release site nine months after release.Aenasius vexans, however, did not disperse at all despite being consistently recovered at its release site. In Pernambuco, 9010 parasitoids were released from October, 1995 onwards.Acerophagus coccoisandAenasius vexanswere recovered up to 40 km from the release sites after three and five months of their initial releases, respectively. The establishment and dispersal of these parasitoids are discussed.

Publisher

Cambridge University Press (CUP)

Subject

Insect Science,Agronomy and Crop Science,General Medicine

Reference16 articles.

1. Estimating Total Losses from Parasitoids for a Field Population of a Continuously Breeding Insect, Cassava Mealybug, Phenacoccus herreni, (Homoptera: Pseudococcidae) in Colombia, S.A.

2. Host preferences of two encyrtid parasitoids for the Columbian Phenacoccus spp. of cassava mealybugs

3. First record of the entomopathogenic fungus Neozygites fumosa on the cassava mealybug Phenacoccus herreni;Delalibera;Journal of Invertebrate Pathology,1997

4. de Silva A.B. (1975) Phenacoccus sp. a nova praga que ataca as ponteriras da mondioca. Empresa Brasileira de Pesquisa Agropecuária, Centro Nacional de Pesquisa do Trópico Úmido: Comunicado Técnico No. 6, 2 pp.

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