How to Get Rid of Cockroaches | NZ DIY Guide

A Tauranga Technician’s Guide to Cockroaches in the House, Since Feb 2006

The short answer: first work out which cockroach it is. The big dark ones live outdoors and wander in by accident. The small striped ones in the kitchen are German cockroaches, which breed indoors and need baiting, cleaning and usually professional treatment.

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🔍 Which Cockroach Is It?

German cockroach
German cockroachLight brown, 12 to 15 mm, with two dark stripes behind the head. Breeds indoors.Photo: Clemson University – USDA Cooperative Extension Slide Series,, CC BY 3.0 us
Gisborne cockroach
Gisborne cockroachLarge, dark and shiny with a pale stripe along each side. No wings. Lives outdoors.Photo: Nurg, CC BY-SA 4.0
Native bush cockroach
Native bush cockroachSmall, brown and wingless. Lives in the garden and leaf litter.Photo: Jaco Grundling, CC0

🛠️ If It Is One of the Big Outdoor Ones

  • Put it back outside. They do not breed in the house.
  • Seal the gaps under doors and around windows.
  • Keep firewood, bark and pot plants away from the house walls.
  • Shake out firewood before bringing it in.

🛠️ If It Is German Cockroaches

1. Clean Up Grease and Crumbs

behind and under the oven, fridge, microwave and toaster.

2. Fix Dripping Taps and Leaks

Cockroaches need water more than food.

3. Seal All Food

and do not leave dishes or pet food out overnight.

4. Use Cockroach Gel Bait or Bait Stations

in the cupboards and behind appliances where you have seen them. Follow the label.

5. Do Not Spray Where You Have Baited

Spray puts them off the bait and drives them deeper into the walls.

6. Check Again with a Torch at Night

after two weeks.

🏡 When to Call a Professional

  • You are seeing the small striped ones. A few in the open usually means many more hidden.
  • You see cockroaches in the daytime.
  • They are still there two weeks after baiting.
  • It is a food business or a rental.

Have a look at our professional cockroach control service, or call for a free estimate.

❓ Not Sure What You Have Got?

Our free What’s My Pest picture guide shows the common Bay of Plenty pests, what you can do yourself, and when to call us.

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