cockroach

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cockroach

(kŏk′rōch′)
n.
Any of numerous insects of the order or suborder Blattaria, having oval flat bodies and laying eggs in hardened cases, and including several species that are common household pests.
A largely nocturnal insect, Order Blattaria; most common US roaches are Periplaneta americana, Blattella germanica and B orientalis, and are of medical interest as potential vectors for bacteria—e.g., Salmonella species; other organisms cultured from cockroaches include Shigella, Proteus, Mycobacterium spp, E coli, Klebsiella pneumoniae and Pseudomonas aeruginosa

cockroach

Entomology A largely nocturnal insect, Order Blattaria; most common US roaches are Periplaneta americana, Blattella germanica and B orientalis, and are of medical interest as potential vectors for bacteria–eg, Salmonella spp; other organisms cultured from cockroaches include Shigella, Proteus, Mycobacterium spp, E coli, Klebsiella pneumoniae and Pseudomonas aeruginosa

cockroach

the common name for members of the insect order Dictyoptera.
References in periodicals archive ?
The immersion of American cockroaches resulted in the highest knockdown (100%) and mortality (84.00 [+ or -] 4.00%).
When compared with the concentration needed to achieve [LC.sub.50] for German cockroaches ([LC.sub.50] = 0.56%), it took a significantly lower concentration of dishwashing liquid to achieve [LC.sub.50] for American cockroaches using the immersion application ([LC.sub.50] = 0.24%) (Table 4).
Means separation by SNK indicated that American cockroaches that were sprayed had significantly less knockdown (56.8%) and mortality (75.2%) compared with all other combinations of cockroach species and application methods (99-100%) (Table 5).
(1984) reported that a splash of commercially available soaps in water would kill American cockroaches at a 1-2% solution.
The [LC.sub.50] for American cockroaches exposed by immersion was 0.24%, but not significantly less than the [LC.sub.50] (0.56%) for the German cockroaches.

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