You don’t get to be the oldest living organism on Earth (over 350 Million years) by being easy to get rid of. Everywhere that man has colonized so too has the cockroach.
Your decision on which method to use to eradicate cockroaches should be flexible but based on a set Integrated Pest Management strategy involving;

iconWhen properties are challenged by termites pest managers are constantly faced with a need to know construction methods from yesteryear through to the modern day.  On older homes the replacement of the outside loo may give termites access whereas determining the type of concrete slab is critical in planning treatment of modern homes.

iconHistorically, the most common site of red-back spider bite was the male genitals as he sat on the ‘thunder-box’.  But these spiders are found in many places which means that people are likely to be bitten on any part of their body.  Before an effective anti-venom was developed in 1956, 12 people in Australia were reported to have died from red-back bites; no one has died from red-back spider bite since.

iconThere are a few schools of thought about spider treatments, but as always it is important to identify which spider you are treating and your (customer’s) desired outcome. There are some people who claim you can only control spiders by direct contact at the time of treatment.  Some manufacturers have claimed their product has shown more than 18 months control in trials.  Others claim, and this is where I sit, that it is important to contact as many spiders as possible at the time of treatment but residual spider control is most likely achieved by controlling flies and moths, the spider’s prey.  Which is true?