Cockroaches in Perth: every guide
All 3 of our guides on cockroaches in one place, newest first, with the quick answers from each.

Do Cockroaches Bite? Perth Guide to Three Species
Cockroaches do not bite but carry bacteria and trigger asthma. German, American and Australian species each need different treatment strategies.
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How to Get Rid of Three Types of Cockroaches in Perth
Cockroach treatment in Perth covers German, American and Australian species. Identify yours, then gel bait, growth regulator and drain treatment.
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How to Get Rid of German Cockroaches in Perth
German cockroaches are 12 to 15 mm, tan with dark stripes, and breed in warm kitchen voids. Gel bait and growth regulator reach them where spray cannot.
Read the guideQuick answers about cockroaches
Do cockroaches carry disease?
Cockroaches may be a reservoir for bacteria including salmonella, staphylococcus and streptococcus, and also harbour viruses such as polio. Because they walk through drains and refuse then cross food-preparation surfaces, disease may be transmitted to humans through contaminated food. Their droppings and shed skins are recognised asthma triggers and a reason food businesses run continuous management programs.
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From Do Cockroaches Bite? Perth Guide to Three Species
Can I treat cockroaches with supermarket products?
Supermarket sprays are repellent and scatter cockroaches away from gel bait placements. Some supermarket baits work if placed correctly, but repellent sprays should not be used beforehand. Always follow label directions exactly. If you have already sprayed, wait the interval the label specifies before placing gel bait.
From Do Cockroaches Bite? Perth Guide to Three Species
How long does cockroach treatment take to work?
German cockroach activity usually falls away over two to three weeks as the gel and growth regulator work through the population. Drain-based American and Australian cockroach jobs clear faster because the breeding site is treated directly. A scheduled follow-up visit, included in the kitchen program, checks placements and applies more gel if needed.
From Do Cockroaches Bite? Perth Guide to Three Species
Can I treat cockroaches myself with shop-bought products?
Spray kills the cockroaches you see walking. The rest are inside voids, behind appliances and inside egg cases, and they breed back faster than survivors die. Gel bait reaches the ones in the voids, and an insect growth regulator stops juveniles maturing into breeding adults. A proper treatment combines inspection, gel placement, growth regulator and follow-up. The spray is the smallest part.
From How to Get Rid of Three Types of Cockroaches in Perth
How long does cockroach treatment take to work?
German cockroach activity usually falls away over two to three weeks as the gel and growth regulator work through the population. Drain-based American and Australian jobs clear faster because we can treat the breeding site directly. Established German infestations get a scheduled follow-up visit included in the kitchen program.
From How to Get Rid of Three Types of Cockroaches in Perth
Are gel baits placed near food or on benches?
Gel is placed inside cabinetry voids, behind and under appliances, on the hinge side of doors and in kickboard gaps, away from food-contact surfaces. We do not spray inside kitchen cupboards or on benches. You get a list of placements with your report.
From How to Get Rid of Three Types of Cockroaches in Perth
What is the difference between gel bait and spray?
Spray kills the cockroaches you can see on surfaces. Gel bait is placed in the voids where they hide and is carried by foragers back to the nest. An insect growth regulator stops juveniles maturing into breeding adults.
From How to Get Rid of German Cockroaches in Perth
How long does treatment take to work?
German cockroach activity usually falls away over two to three weeks. A scheduled follow-up visit is included in the kitchen program to check placements and re-apply if needed. Terms at djpest.com.au/warranty.
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