This chapter discusses Blattodea or cockroaches as pests, its effects on human health, and how can cockroaches be controlled. About 70 species occur in the United States, 24 of which have been introduced from other parts of the world. There are many beautiful cockroaches in the family, however, the well known pest - the German Cockroaches are also in this family. Variations often take the form of behaviors that produce airborne or substrate borne vibrations, particularly when males are courting reluctant females. According to Atkinson et al. Injuries occur but are rarely mortal; most fights end in truce or retreat. Suborder BLABEROIDEA Family Blattellidae Some members in this family the females are wingless. In decapitated adult females, methoprene or JH III induces Vg protein synthesis (Keeley et al., 1988) and a 6.5 kb mRNA, presumably corresponding to the Vg transcript (Bradfield et al., 1990). This family contains many of the smaller common household pest cockroaches, among others. Later studies demonstrated that allatectomy of R. prolixus does not totally abolish Vg synthesis, but JH treatment does restore normal production (Wang and Davey, 1993). Some male cockroaches whistle at females with surprisingly complex, almost birdlike sounds that vibrate through the air and ground (Sueur and Aubin, 2006).   Your previous content has been restored. Cockroaches are referred to as generalized orthopteroid insects which classifies them with the true Orthoptera (crickets, katydids, grasshoppers, locusts), Phasmatodea (walking sticks), Mantodea (praying mantids), Plecoptera (stoneflies), Dermaptera (earwigs), Isoptera (termites), and a few other minor groups. Ectobiidae (formerly Blattellidae) is a family of the order Blattodea ( cockroaches ). By Tergal glands thus serve to maneuver the female into the proper position for mating and arrest her movement so that the male has an opportunity to engage her genitalia. Baltimore: The Johns Hopkins University Press. An alpha male patrols his territory, lunging at subordinates and sending them cowering into corners of the cage. Richard J. Brenner, Richard D. Kramer, in Medical and Veterinary Entomology (Third Edition), 2019. (Fig. Because it smells like food, virgin, mated, and gravid females, as well as males and last instar nymphs are attracted to the tergal secretion. Nearly all of the blaberids that occur in the United States are restricted to subtropical regions and have minor medical or veterinary significance. Production rates of juvenile hormone (JH) from the corpora allata, vitellogenin (Vg) from the periovarial fat body, and fat body Vg mRNA during the first reproductive cycle in the cockroach Blattella germanica. Because these secretions exploit a female’s underlying motivation to feed, they can be classified as sensory traps: they mimic stimuli that females have evolved, under natural selection, for use in other contexts. The regulation of vitellogenesis by JH has been most thoroughly studied in Blattella germanica (Blattellidae). Subgenital plate symmetrical (at most weakly asymmetrical), bearing two widely separated cylindrical styles at the postereolateral margins, Subgenital plate symmetrical (valvular), bearing a pair of valve, divided by a longitudinal groove.". Cockroaches: Ecology, Behavior, and Natural History. Only one study has demonstrated a role for JH in a homopteran species. Rouland et al. Fighting in many species simply brings about “spacing” whereby individuals are no longer in contact with each other. They may be applied as aerosols, baits, dusts, granulars, as crack and crevice treatments, or in traps. We use cookies to help provide and enhance our service and tailor content and ads. (1991), 17 of these species are pests of varying degrees. In the adult females of Hemimetabola (Dictyoptera to Hemiptera) and Coleoptera, JH is the main regulator and pleiotropically controls most aspects of female reproduction (Figure 2). There are 3,500 to 4,000 species of cockroaches that have been identified, which can be divided into five families: Cryptocercidae, Blattidae, Blattellidae, Blaberidae, and Polyphagidae. 38, 137–146.). ""the easiest way to distinguish the Blattellidae from the Blattidae are: Subgenital plate symmetrical (valvular), bearing a pair of valve, divided by a longitudinal groove."". Conversely, female Teleogryllus commodus emerging from allatectomized larvae can still produce eggs (Loher and Giannakakis, 1990). Figure 2. The tergal secretion of male German cockroaches is a complex mixture known to vary both individually and daily, and includes maltose, a potent phagostimulant for domestic cockroaches. By continuing you agree to the use of cookies. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. URL:, URL:, URL:, URL:, URL:, URL: Unfortunately I don't have the answer but I asked Darren from BCG: "the easiest way to distinguish the Blattellidae from the Blattidae are: Underside of middle and hind femora always entirely and similarly spined on both sides (exception the Archiblattinae), pulvilli and arolia usually present.

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