Cockroach infestation on seagoing ships

Area of Science:

• Maritime Health
• Urban Entomology
• Pest Management

Background:

• Cockroach infestations are common globally, yet data on seagoing vessels is limited.
• Understanding pest prevalence on ships is crucial for public health and biosecurity.

Purpose of the Study:

• To determine the prevalence of cockroach infestation on ships docking in Hamburg port.
• To identify factors associated with infestation, such as ship size and age.

Main Methods:

• Standardized inspections were conducted on 59 ships in August 2005.
• Methods included illuminating hiding places and using pyrethrum spray to provoke insect escape.
• Escaping cockroaches were counted within 3 minutes.

Main Results:

• Cockroaches were found in the galley or mess room of 6 ships (10.2% prevalence).
• Infestations were more common on ships over 10,000 gross register tons (GRT) and older than 7 years.
• Blattella germanica was detected on 5 ships; Blatta orientalis on 1 ship.
• Pyrethrum spray was more effective in detection than illumination or visual inspection.

Conclusions:

• A notable percentage of ships in Hamburg port exhibit cockroach infestations.
• Ship characteristics, specifically size and age, correlate with increased infestation risk.
• Targeted pest management strategies may be necessary for maritime vessels.