All you need to know about Bedbugs : Morphology, Biology, Detection and Control Methods

Bed bugs (Cimex lectularius) are nocturnal parasitic insects that feed on the blood of humans and animals. They have become a growing problem in many parts of the world, including Belgium. This article explores in depth the morphology, biology, detection and control methods of bedbugs, as well as post-treatment follow-up measures to ensure complete eradication.

Bedbug morphology

Adult bed bugs measure around 3 to 7 mm in length, are oval and flattened in shape, and have a reddish-brown color after taking a blood meal. Their body is divided into three parts: head, thorax and abdomen. They have segmented antennae, compound eyes and stinging, sucking mouthparts. Nymphs, or young bugs, are smaller and almost transparent before feeding.

Biology and Life Cycle

Bed bugs go through three stages of development: egg, nymph and adult. They moult after each blood meal. Eggs are laid 3 to 10 days after mating. 3 to 5 eggs are laid daily by a female. Females are fertile for around 2 months. A female can lay between 200 and 500 eggs in her lifetime, which favors rapid infestation if left unchecked. Ambient temperature is also a crucial factor. The incubation period of eggs decreases as ambient temperature rises. At 28°C, an egg incubates in 4 days, compared with 50 days at 13°C.

Bedbug detection

Early detection is essential to avoid a major infestation. Here are some warning signs of the presence of bed bugs:

• • Observation of bites: Bites often appear in lines or groups on exposed skin.
  • Observation of bloodstains: Small bloodstains on sheets or mattresses.
  • Observation of excrement: Small black or brown dots on sheets, mattresses and furniture.
  • Eggs and molts: Transparent eggshells and molts found in hiding places.
  • Observation of specimens: Bedbugs tend to hide in seams, folds, mattress buttons, bedside furniture, junctions and baseboards, in cracks, door frames, etc.
  • Detection methods: to detect signs of bedbugs as quickly as possible, the following methods are recommended:
  • Visual inspection by a qualified technician: a qualified technician can visually inspect at-risk locations and areas to confirm/infirm the presence of bedbugs.
  • Detection traps: equipped with a glue strip or carbon dioxide generator. Limited to premeditated, restricted areas around the bed.
  • Trained detection dogs: thanks to their sense of smell, detection is much more effective than visual inspection by humans. However, reliability is never absolute.

Bedbug control methods

There are several methods for controlling bed bugs, ranging from chemical solutions to physical approaches. Here are the most common:

Physical methods

• Anti-bug equipment: airtight mattress covers and footboard barriers
• Vacuuming: Use a powerful vacuum cleaner to remove bedbugs and eggs from mattresses, furniture and crevices.
• Washing: Wash contaminated clothing, bed linen and other items at a high temperature (at least 60°C).
• Freezing: place contaminated linen and objects at at least -20°C for a few days.
• Cryogenics: apply a stream of dry ice for a few seconds to infested areas.
• Heating: localized or volume heating of rooms and areas to be treated at temperatures between 60°C and 180°C.

Chemical treatments

• Insecticide spraying: containing a sufficiently high dose of a persistent active ingredient, in liquid or powder form, of households and surrounding rooms, as bedbugs can escape the insecticide.
• Insecticide volume fogging: only as a complement to spraying, to eliminate bedbugs at height, flush them out of their hiding places and circulate them around freshly sprayed surfaces.

Follow-up

Treatment, whether physical or chemical, is not instantaneous and miraculous. Eggs are resistant to insecticides. Follow-up visits and reprocessing are necessary.

1st follow-up visit: within 10 days of the first treatment, to check the results of the initial treatment and detect any new niches after the treatment has escaped. A second treatment is applied immediately as the eggs continue to hatch.

2nd follow-up visit: no later than the end of the 2nd month after the initial treatment. This period corresponds to the female’s fertile period. The aim is to check that the infestation is over and that no new specimens have appeared.

3rd (4th, 5th, …) follow-up visit: in cases where the previous visit shows that the infestation persists and has not been eradicated. Large-scale infestations may require up to five treatments.

Conclusion

Bed bugs are a persistent problem, but with early detection, appropriate control methods and rigorous monitoring, they can be effectively eradicated. At PestPatrol, we offer professional bedbug detection, treatment and monitoring services to ensure our customers’ peace of mind. Contact us today for a complete inspection and treatment plan customized to your needs.