Journal of Pest Science (2017) 90, 287-297

Olivier Aubry, Daniel Cormier, Gérald Chouinard and Eric Lucas (2017)
Influence of extraguild prey and intraguild predators on the phytophagy of the zoophytophagous bug Campylomma verbasci
Journal of Pest Science 90 (1), 287-297
Abstract: The mullein bug, Campylomma verbasci (Meyer-Dür) (Hemiptera: Miridae), a palearctic zoophytophagous insect or plant-feeding predator, is common in apple orchards of North America. The aim of this study was to evaluate the influence of the biotic environment (extraguild prey and intraguild predators) on the phytophagy of this zoophytophagous bug. We hypothesized that (1) the presence of extraguild prey should reduce the intensity of phytophagy by the mullein bug and that (2) the presence of intraguild predators should reduce the intensity of phytophagy by the mullein bug as an intraguild prey. Phytophagy was evaluated by observing (1) mullein bug feeding punctures in the laboratory and (2) apple fruit damage by mullein bug in the field. Two extraguild prey types were tested: Aphis pomi De Geer (Hemiptera: Aphididae) and Panonychus ulmi (Koch) (Acari: Tetranychidae), at four densities each (zero, four, eight, and 16). Seven combinations of insects were tested using one mullein bug nymph with or without an intraguild predator (coccinellid). Our results confirm the first hypothesis, but only partially confirm the second. The number of feeding punctures only decreased in the presence of some intraguild predators.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Olivier Aubry, Éric Lucas

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
Research topic(s) for beneficials or antagonists:
environment/habitat manipulation

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Panonychus ulmi	Apple (Malus)	Canada (east)
	Aphis pomi	Apple (Malus)	Canada (east)
	Campylomma verbasci	Apple (Malus)	Canada (east)
Campylomma verbasci (predator)			Canada (east)