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Effect of a new insect growth regulator, RO 13-5223, on hymenopterous parasites of scale insects

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Abstract

The insect growth regulator, RO 13-5223, applied at concentrations up to 0.1% a.i., did not affect the normal development of immature stages of 2 hymenopterous parasites:Metaphycus bartletti Annecke & Mynhardt andAphytis holoxanthus DeBach, parasitoids ofSaissetia oleae (Olivier) andChrysomphalus aonidum (L.), respectively. Spraying citrus trees at the rate of 7.5 g. a.i./tree had no adverse effect on the activity of the following parasitoids:Aphytis chrysomphali (Mercet) andComperiella bifasciata Howard, an ecto- and endoparasite of the California red scale,Aonidiella aurantii Maskell, respectively;Aphytis hispanicus (Mercet) andProspaltella inquirenda Silvestri, an ecto- and endoparasite of the citrus chaff scale,Parlatoria pergandii Comstock, respectively.

Résumé

Le régulateur de croissance des insectes, RO 13-5223, appliqué à des concentrations allant jusqu'à 0,1% n'affecte pas le développement des stades larvaires de 2 hyménoptères parasites:Metaphycus bartletti Annecke & Mynhardt etAphytis holoxanthus DeBach, parasitoides respectifs deSaissetia oleae (Olivier) etChrysomphalus aonidum (L.). La pulvérisation de citrus à raison de 7,5 g par arbre n'a pas d'effets nocifs sur l'activité des parasites suivants:Aphytis chrysomphali (Mercet) etComperiella bifasciata Howard, ecto et endoparasite du pou de Californie,Aonidiella aurantii Maskell, respectivement;Aphytis hispanicus (Mercet) etProspaltella inquirenda Silvestri, ecto et endoparasite respectifs deParlatoria pergandii Comstock.

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Peleg, B.A. Effect of a new insect growth regulator, RO 13-5223, on hymenopterous parasites of scale insects. Entomophaga 28, 367–372 (1983). https://doi.org/10.1007/BF02372190

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