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Acceptability of Diorhabda carinulata1, an Introduced Biological Control Agent of Tamarix, as Prey for Selected Resident Native Arthropod Predators

Berro, A. M., Evans, S., Ferguson, E. M., Royer, T. A.
The Southwestern entomologist 2017 v.42 no.3 pp. 665-676
Chrysoperla rufilabris, Coccinella septempunctata, Collops, Diorhabda carinulata, Orius insidiosus, Tamarix, Zelus, adults, biological control agents, conservation areas, eggs, insect larvae, natural enemies, predation, predatory insects, surveys, Oklahoma
Although biological control agents are imported without the constraints exerted by their native natural enemies, many native, generalist arthropod predators might use the new food source after release in the field. Predation by native arthropods is a potential obstacle to establishment of Diorhabda spp. as a biological control agent against saltcedar, Tamarix spp. Arboreal predaceous insects were surveyed at the Great Salt Plains National Wildlife Refuge to identify possible predators that could affect establishment of the northern tamarisk beetle, Diorhabda carinulata (Desbrochers), in Oklahoma. Results of the survey showed that 57% of the arthropods were represented by five insects, Zelus tetracanthus (Stål) (Hemiptera: Reduviidae) (21%); several species of Chrysoperla (Neuroptera: Chrysopidae) (11%); the insidious flower bug, Orius insidiosus (Say) (Hemiptera: Anthocoridae) (10%); Collops quadrimaculatus (F.) Coleoptera: Melydridae) (8%); and the sevenspotted lady beetle, Coccinella septempunctata L. (Coleoptera: Coccinellidae) (6%), in saltcedar stands. No-choice feeding studies demonstrated that eggs and larvae of D. carinulata were accepted prey for larvae of Chrysoperla rufilabris (Burmeister) and sevenspotted lady beetle adults but not larvae. Northern tamarisk beetle larvae were accepted prey for Z. tetracanthus.