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Wellington
Phone: 04 576 0528
Fax: 04 526 9162
Tony Behrent: 027 687 5446
Mark Atkinson: 027 232 9878
tony.behrent@targetpest.co.nz

Manawatu
Palmerston North: 06 353 1110 or 027 232 9878
mark.atkinson@targetpest.co.nz

Christchurch
Phone: 027 497 9374
Toll Free: 0800 487277
Depot: 03 323 6961
christchurch@targetpest.co.nz

Dunedin
Phone: 0800 662 6737
dunedin@targetpest.co.nz

Nelson
Phone: 0800 662 6737
nelson@targetpest.co.nz

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Cockroaches

Oriental cockroaches, adults, nymphs and egg cases.

Cockroaches are large dark beetles. The natural habitat of the cockroach is warm, moist conditions found in tropical and subtropical countries. However, they have found similar conditions in the kitchens, bath-rooms, ducts and sewers of more temperate regions. This combination of habitats makes these insects a particular health hazard. They will crawl from dustbin or sewer onto kitchen work surfaces, perhaps carrying disease organisms on their feet and mouths. Their life cycle includes a stage in which the eggs are encased in a hard chitinous case, which can lie dormant for several months and is largely protected from insecticide. Three species are commonly encountered in New Zealand, the Oriental Cockroach (Blatta orientalis), American Cockroach (Perplaneta Americana) and the German Cockroach (Blattella germanica).

Cockroaches are nocturnal (active at night) and conceal themselves during the day in cracks and crevices, often around drains, sinks, cookers and in ducting. The mated female will lay (Oriental) or carry (German) the chitinous “purses” containing eggs or nymphs. When the eggs hatch the nymphs look like adult cockroaches in miniature but have to go through several molts before becoming sexually mature. Cockroaches are gregarious, and given favourable conditions can produce very large infestations of hundreds or thousands of individuals. In large numbers the infestation will produce a distinctive offensive odour.

For information on other crawling insects click here.

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