Reasons for control
Cockroaches can carry diseases from dirty areas to areas that need to be kept clean such as kitchens. Diseases include dysentery, gastro-enteritis, typhoid and tuberculosis.
- There are two common cockroaches found in this area. These are the German Cockroach (Blattella germanica) & the Oriental Cockroach (Blatta orentalis).
- Cockroaches are large insects. The German cockroach is about 12mm long and the Oriental is about 22mm long.
- The German cockroach is yellowish brown in colour and the Oriental is dark brown.
- They spend most of their day hiding in cracks and crevices.
- They are not fussy eaters and even eat hair and leather goods.
- They are quite social insects and can often be found in groups.
Prevention & control
- Good hygiene methods are essential.
- Cover food sources.
- Seal cracks and crevices.
Treatment
- Spray, dust and bait insecticides can be used. Daytime hiding places must be found and treated with insecticide. Guildford Borough Council use a suspension concentrate containing 1% Deltamethrin followed by the application of a food matrix formula containing 2.15% w/w Hydramethylnon.
- Cockroaches are very difficult to treat due to the persistent nature of the eggs.
- Obtaining professional advice is recommended.
Contact the pest control officer for further advice and an appointment.