Bed bugs can survive without food for long periods. At low temperatures, the development time can take up to a year.Īctivity stops when the temperature drops below 10 ̊C. At optimal temperatures (28-30 ̊C) and humidity (75-80% RH) the entire life cycle takes four to five weeks. Nymphs have five development stages and they must feed at least once between each stage. It takes 4-21 days before a nymph hatches from an egg. Eggs are glued to their hiding places (Figure 2). Females normally lay 1-2 eggs per day and may produce 200-500 eggs during adulthood.
Life cycleīed bug reproduction and development is highly dependent on temperature and food availability. The proboscis points forward when in use. They have no wings and their mouth parts form a long, articulated suction tube (proboscis) which is pointed backwards under the head and thorax. When bed bugs suck blood, they swell and darken (figure 3). The eggs are 1 mm long and white (figure 2). The nymphs resemble adults but they are smaller and lighter in colour. FHI - Håvard Øyrehagenīed bugs are reddish-brown with an oval, flat body shape (Figure 1). FHI - Heidi Lindstedtįigure 3: Adult bed bug feeding.
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Characteristicsįigure 2: Bed bug egges laid in crack in sofa. dissimilis) and swallow bugs ( Oeciacus hirundinis) may occasionally come indoors and bite humans.
hemipterus and Leptocimex boueti also feed on humans. The common bed bug ( Cimex lectularius) lives indoors and in recent years has become much more common in Norway.
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