Omnivore or Herbivore? Field Observations of Foraging byLygus hesperus(Hemiptera: Miridae)

Maize-Dwelling insects omnivory in Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) egg masses

“…However, when omnivorous insects act as herbivores, they may become pests (Coll and Guershon 2002). The alternation between pest and predatory status may be a function of prey availability (Rosenheim et al 2004) or quality of the host plant (Coll 1996). Here we report the occurrence of omnivory behavior of maize-dwelling arthropods on Spodoptera frugiperda egg masses as a contribution for better understanding the multitrophic interactions in maize.…”

“…Thus, planning integrated pest management programs can become more complex in the ecological systems that include omnivorous. Therefore, the present observations highlighted the necessity of detailed studies to quantify the frequency of predation, predatory capacity, factors that trigger the choice of food source, as well as the importance of each food source (Rosenheim et al 2004) to understand the real impact of these omnivorous insects in maize ecosystems and its implication on enhancement of integrated pest management. …”

Among-Sampler Variation in Sweep Net Samples of Adult Lygus hesperus (Hemiptera: Miridae) in Cotton

“…Regarding the second issue (whether altered behavior inßuences capture by the sweep net), Wilson et al (1984), Snodgrass (1998), andRosenheim et al (2004) reported different patterns of within-plant distribution or plant part association for lygus nymphs and adults. However, Zink and Rosenheim (2004) reported that collection efÞciency of the sweep net for late-instar lygus nymphs was nearly equivalent to that for adults.…”

“…Lygus adults for release were obtained from a laboratory colony reared on pods of green bean, Phaseolus vulgaris L., and raw sunßower, Helianthus annuus L., seeds or were collected from plots of alfalfa, Medicago sativa L. Lygus adults were harvested from the colony three times weekly. Rosenheim et al (2004) reported apparent gender-based differences in the plant part associations of lygus adults. Cooper and Spurgeon (2010b) reported differences in feeding behaviors among classes of adult lygus characterized by age, reproductive development, and mating status.…”

Impact of native predators and parasites on Spodoptera exigua, an introduced pest of alfalfa hay in northern California

“…warrant further investigation, especially in crops where these bugs are key pests (cf. Rosenheim et al, 2004).…”