Host range testing parameters for Diadromus collaris.

Citation

Cock C, Mason PG, Cappuccino N (2021) Host range testing parameters for Diadromus collaris. Pest Management Research Report - 2020 Growing Season. Agriculture and AgriFood Canada. April 2021. Report No. 05. Vol. 59: 13–17.

Résumé en langage clair

Diadromus collaris, a solitary parasitoid of diamondback moth pupae, is a candidate for introduction into Canada as a biological control agent. It is important to assess the parasitoid’s host specificity before its release. To maximize the wasp’s expressed host range, five variables were tested to determine which experimental conditions would motivate D. collaris to inject an egg into diamondback moth. Of these variables, wasp diet, exposure length, and the presence or absence of diamondback moth cocoons resulted in statistically significant differences in D. collaris emergence or diamondback moth mortality.

Résumé

Diadromus collaris (Gravenhorst) (Hymenoptera: Ichneumonidae), a solitary pupal endoparasitoid of Plutella xylostella (Linnaeus) (Lepidoptera: Plutellidae), is a candidate for introduction into Canada as a biological control agent. It is important to assess the parasitoid’s host specificity before its release. To maximize the wasp’s expressed host range, five variables were tested to determine which experimental conditions would motivate D. collaris to oviposit. Of these variables, wasp diet, exposure length, and the presence or absence of diamondback moth cocoons resulted in statistically significant differences in D. collaris emergence or diamondback moth mortality.

Date de publication

2021-04-01

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