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Morphological and Biological Studies on Typhlodromus Talbii Athias-Henriot (Gamasida: Phytoseiidae)

Published online by Cambridge University Press:  19 September 2011

M. A. Zaher ,
M. A. El-Borolossy  and
Fatma S. Ali
M. A. Zaher
Affiliation:
Agricultural Zoology Department, Faculty of Agriculture, Cairo University, Giza, Egypt
M. A. El-Borolossy
Affiliation:
Plant Protection Department, National Research Center, Dokki, Cairo, Egypt
Fatma S. Ali
Affiliation:
Agricultural Zoology Department, Faculty of Agriculture, Cairo University, Giza, Egypt
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Abstract

The immature stages of the predaceous mite Typhlodromus talbii Athias-Henriot are described. The mite was reared on different prey species and pollen in the laboratory, and its developmental parameters calculated. Tydeus californicus (Banks) was found to be the most suitable and nourishing diet, giving a shorter life cycle and higher female fecundity (8.8 days and 33.4 eggs respectively), than the scale insect Coccus acuminatum (Gennadius) (10.0 days and 24.8 eggs respectively) at 25 °C. Other associates of Typ. talbii, the eriophyid Cesaberoptus kenyae Keifer, the tetranychid Oligonychus mangiferus (R. & S.) as well as date palm and castor oil pollen, were unsuitable diet. When reared on moving stages of Tyd. californicus (Banks) at 70 ± 5 % RH, 16:8 (L:D) h photoperiod and temperatures of 15,20,25,28,30,32 and 35 °C, the total developmental time of Typ. talbii averaged 21.3, 12.4, 8.8, 7.6, 7.1, 5.8 and 11.6 days respectively. The intrinsic rate of natural increase (rm) and the net reproduction (Ro) reached maximum values of 0.299 individuals per female per day and 28.06 times respectively, at 32 °C.

Résumé

Les stades juvéniles de l'acarien prédateur Typhlodromus talbii Athias-Henriot sont décrits. L'acarien a été élevé au laboratoire sur différentes espèces de proies et différents pollens, et ses paramètres de développement calculés. Tydeus californicus (Banks) a été la proie la mieux adaptée et la plus nourrissante ayant donné à 25 °C un cycle de vie plus court et une plus forte fécondité (8.8 jours et 33.4 oeufs respectivement), que la cochenille Coccus acuminatum (Gennadius) (10.0 jours et 24.8 œufs respectivement). Les autres régimes alimentaires de T. talbii, l'Eriophyide Cesaberoptus kenyae Keifer, le tétranyche Olygonychus mangifera (R. & S.), de même que les pollens du palmier dattier et du ricin sont des nourritures inapropriées. Lorsqu'il a été élevé sur des stades mobiles de T. californicus à 70 ± 5% HR, 16/8 (J:N) de photopériode et à des températures de 15, 20, 25, 30, 32 et 35 °C, la durée totale du développement de T. talbii est en moyenne de 21.3,12.4, 8.8, 7.6, 7.1, 5.8 et 11.6 jours respectivement. Le taux intrinsèque d'accroissement naturel (rm) et le taux net de reproduction (R0) ont des valeurs maxima de 0.299 individus par femelle et par jour et 28.06 respectivement, à 32 °C.

Keywords

morphologylife tablepredaceous mitedietTyphlodromus talbiiTydeus californicusPhytoseiidaeAcarimorphologietable de vieacarien prédateurrégime alimentaireTyphlodromus talbiiTydeus californicusPhytoseiidae
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 21 , Issue 1 , March 2001 , pp. 43 - 53
Copyright
Copyright © ICIPE 2001

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