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Encapsulation rates of two encyrtid parasitoids by two Phenacoccus spp. of cassava mealybugs in Colombia
Author(s) -
Driesche R. G.,
Bellotti A.,
Herrera C. J.,
Castillo J. A.
Publication year - 1986
Publication title -
entomologia experimentalis et applicata
Language(s) - French
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1111/j.1570-7458.1986.tb02190.x
Subject(s) - mealybug , biology , encapsulation (networking) , nymph , parasitoid , horticulture , botany , biological pest control , pest analysis , computer network , computer science
Between 3 and 15% of all parasitized cassava mealybugs of the species Phenacoccus herreni Cox & Williams successfully defeated the parasitoid Epidinocarsis diversicornis (Howard) through encapsulation. Adult mealybugs were less successful at encapsulating all parasitoids than were nymphs in the second stadium. Encapsulation rates were higher at 25 °C than 30 °C in both nymphs and adults. No encapsulation of E. diversicornis was observed in Phenacoccus gossypii Townsend & Cockerell. No significant encapsulation of another encyrtid, Acerophagus coccois Smith, was observed in either species of mealybug. RÉSUMÉ Taux d'encapsulation de deux encyrtides parasitoïdes de deux Phenacoccus du manioc en Colombie De 3 à 15% des Phenacoccus herreni parasités ont éliminé par encapsulation du parasitoïde Epidinacornis diversicronis. Les pseudococcines adultes ont encapsulé plus faiblement que les larves de second stade. Les taux d'encapsulation étaient plus élevés à 26 quà 30 °C, tant chez les nymphes que chez les adultes. Aucune encapsulation de E. diversicornis n'a été observée dans Phenacoccus gossypii. Aucune encapsulation notable d'un autre encyrtide: Acerophagus coccois n'a été observée dans l'une ou l'autre des pseudococcines.