Table 1. Field and laboratory relationships among host bugs and egg parasitoid species used in the experiments.

			Pentatomid hosts
			Graphosoma semipunctatum	Murgantia histrionica		Nezara viridula
	Trissolcus sp.		• sympatric, associated species	–		–
wasps	Trissolcus brochymenae		• in field: allopatric, no association			• in field: allopatric, no association [23].
Platygastrid	specialist at host/prey andnearly at host plant/feeding substratelevel [4], [22]		• in laboratory: wasp does notaccept eggs	• sympatric, associated species		• in laboratory: wasp responds to host volatile and contact cues; recognizes and accepts eggs; does not emerge [18]
	Trissolcus basalis		• in field: sympatric, no recorded association	• in field: allopatric, noassociation [24]
	generalist at the host and the host plant/feeding substrate levels [4], [22]	• in laboratory: wasp does notrespond to host volatiles; respondsto host chemical trails; recognizesand accepts eggs, and emerges [19]		• in laboratory: wasp does not respond to host volatiles, responds to host chemical trails, recognizes and accepts eggs; does not emerge [19]	• sympatric, associated species