The Neotropical mirid predator Macrolophus basicornis uses volatile cues to avoid contacting old, Trichogramma pretiosum parasitized eggs of Tuta absoluta

Joop C. van Lenteren*, Vanda H.P. Bueno, Mariana Santos-Silva, Flavio C. Montes, Antonino Cusumano, Nina E. Fatouros

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

Polyphagous mirid predators are increasingly used in commercial, augmentative biological control. Information about their foraging behaviour is essential, especially if one intends to use several natural enemies to control one or more pests in a crop, to detect if negative intraguild effects occur. We studied a case of intraguild predation (IGP) involving the predator Macrolophus basicornis (Stal) (Hemiptera Miridae) of the worldwide invasive South American tomato leaf miner Tuta absoluta (Meyrick) (Lepidoptera Gelechiidae) and explored how this predator deals with prey parasitized by Trichogramma pretiosum (Riley) (Hymenoptera Trichogrammatidae). Behavioural observations show that M. basicornis predators contacted significantly fewer old, parasitized eggs of T. absoluta than recently parasitized eggs. Olfactometer tests revealed that predators could smell differences between vola-tiles of tomato leaves infested with eggs of different qualities to locate suitable prey. They preferred volatiles from leaflets with unparasitized eggs above control leaflets and, moreover, preferred volatiles from leaflets with recently parasitized eggs over volatiles of leaflets with 5-day-old parasitized eggs. When predators and parasitoids are used together to control T. absoluta, parasitoids should be introduced one week before predators are released to prevent high levels of IGP.

Original languageEnglish
Pages (from-to)229-237
Number of pages9
JournalBulletin of Insectology
Volume76
Issue number2
Publication statusPublished - Dec 2023

Keywords

  • biological control of invasive pest
  • competitive exclusion
  • intraguild predation
  • Phthorimaea absoluta
  • predator repellence by parasitized prey
  • prey selection
  • South American tomato leaf miner

Fingerprint

Dive into the research topics of 'The Neotropical mirid predator Macrolophus basicornis uses volatile cues to avoid contacting old, Trichogramma pretiosum parasitized eggs of Tuta absoluta'. Together they form a unique fingerprint.

Cite this