Journalartikel

Jahr der Veröffentlichung: 1991

Seiten: 127-132

Zeitschrift: Bulletin of Entomological Research

Bandnummer: 81

Heftnummer: 2

ISSN: 0007-4853

DOI Link: https://doi.org/10.1017/S0007485300051178

Verlag: Cambridge University Press

Abstract: 
In 1988/89 the nature and degree of hyperparasitism in two newly introduced parasitoids of exotic mealybug plant pests were examined in Togo. Associated with Phenacoccus manihoti Matile-Ferrero (Hemiptera: Pseudococcidae) (cassava mealybug) five indigenous hymenopterous hyperparasitoids were found adapted to the primary parasitoid Epidinocarsis lopezi (De Santis): Chartocerus sp. A (Signiphoridae), Prochiloneurus insolitus (Alam), P. aegyptiacus (Mercet) (Encyrtidae), Tetrastichus sp. (Eulophidae), and Marietta leopardina Motschulsky (Aphelinidae). The rate of hyperparasitism varied considerably (20-90%). At one sampling site Chartocerus sp. A was most frequent (52%), at the other site P. insolitus was found to dominate (55%). The same hyperparasitoids were associated with Rastrococcus invadens Williams (Hemiptera:Pseudococcidae), but with an additional Chartocerus (sp. B). Hyperparasitism ranged from 56 to 86%, with Chartocerus sp. A being the most important species. Multiple parasitism was observed on several occasions. In spite of generally high hyperparasitism, no detrimental effect on the control efficiency of either primary parasitoid was noticed.

Harvard-Zitierstil: AGRICOLA, U. and FISCHER, H. (1991) HYPERPARASITISM IN 2 NEWLY INTRODUCED PARASITOIDS, EPIDINOCARSIS-LOPEZI AND GYRANUSOIDEA-TEBYGI (HYMENOPTERA, ENCYRTIDAE) AFTER THEIR ESTABLISHMENT IN TOGO, Bulletin of Entomological Research, 81(2), pp. 127-132. https://doi.org/10.1017/S0007485300051178

APA-Zitierstil: AGRICOLA, U., & FISCHER, H. (1991). HYPERPARASITISM IN 2 NEWLY INTRODUCED PARASITOIDS, EPIDINOCARSIS-LOPEZI AND GYRANUSOIDEA-TEBYGI (HYMENOPTERA, ENCYRTIDAE) AFTER THEIR ESTABLISHMENT IN TOGO. Bulletin of Entomological Research. 81(2), 127-132. https://doi.org/10.1017/S0007485300051178