[nicephotog (OP)]

Over the years i have found many feral beehives,but one type of them stands out.
A feral beehive made in "Breeze blocks"( http://static1.1.sqspcdn.com/static/f/581858/8128318/1281788396863/breeze_block.gif?token=KnVrwcNSK2xr3omDFGsuNVRTSiE%3D ) in walls or between double brick walls that are totally inaccessible.

These concrete blocks are used for walls mainly and are a favorite of feral bees because of warmth stored in stone and often in walls not uncovered structures because heat can easily become too immense(a point hard to get through beekeepers heads about hive temperature).

The trouble is over time , insect pests that prey on beehives or also bring disease can easily build up and breed protected as much as the bees are protected by non accessible.
Also, disease is untreatible and undetectable.

Bees don;t mean much except to people whom are allergic, so many feral hives remain in roofs and in walls but the problem here is breeze blocks or double brick walls

Alike the recent MACS formic acid treatment for Varroa that is fumigation strips, are there any chemicals and tools for fumigating the insect pests that harm beehives (usually wax moth and hive beetle but also various types of ants) but does not harm bees? (mainly referring to the difficulty of the structure of breeze-block walls)
The problem with breeze block walls is they are layered out alike bricks to make walls but the internal space is particularly partition to spray mist movement, too such problems exist for double brick walls.

[MonicaEarl]

Sometimes it becomes very difficult to exterminate honey bees that are in the walls of a house. It is very tough to find a beekeeper to remove them.

[MonicaEarl]

 A pest exterminator would probably not kill bees because they say they are an endangered species. But most of the time these insects are considered more of a nuisance than a danger, so if you have any problem or want to make sure you do not get one, and need to prevent future infestation then it is best that you should hire a bee removal <<<COMMERCIAL LINK REMOVED >>> services.

[Colin2B]

are there any chemicals and tools for fumigating the insect pests that harm beehives (usually wax moth and hive beetle but also various types of ants)

Feral bees will move on when there is disease in a hive (or die out) leaving the pests behind. The wax moths clean out the old comb.
If you want to treat you can spray an oxalic/sugar solution or vaporise oxalic acid - take care with the latter as the fumes are nasty and you need to know what you are doing, pm me if you want to go this way. There are other natural treatments eg thymol and garlic - we crush garlic onto the verroa board and this will cause a mite drop.
By the way, ants aren’t really a problem as they usually eat the mites. If they get really bad the bees move on.

[nicephotog (OP)]

If you want to treat you can spray an oxalic/sugar solution or vaporise oxalic acid - take care with the latter as the fumes are nasty and you need to know what you are doing, pm me if you want to go this way.

(I just got my email and a few other accounts back after a year and a half without a mobile phone so year and a half without a few email and other accounts).
Oddly, many things in Australia are a problem with apiaries (not merely the continual theft that recently destroyed mine),
Slugs are one pest, i take the hive apart and wipe it down with Mentholated spirits and leave it in the sun to dry.
Ants are actually a problem , and of any size, particularly in winter or long periods of rain , they build their nest inside if they can and feed on the honey but build a huge dump in a corner of eggs so they can keep warm and dry from the heater bees brooding work (perhaps one of the reasons for colony collapse occurring). i have lost a couple of nucleus hives from that zealousness during rain and winter.
Some of the spiders neatly sit over the hive entrance and i found these are actually a "bee eater".
https://www.flickr.com/photos/nicephotog/33139013046/
https://www.flickr.com/photos/nicephotog/32365310733/

The place my hives finally fetched up was south of Sydney with Common death adders using it as a breeding ground , some days there were as many as 10 or thereabout baby adders in their characteristic curl loop with head sitting on their body  under the trees in little groups and when you sneeze they would all wake and go crashing back into the heavy scrub bush.