Biological Pests

Common pesticide application methods

The methods chosen to control pests will depend largely on the area being protected and the type of pests present. Infested material should be treated before being introduced to a clean collection. As long as storage conditions are good, this greatly reduces the risk of infestation.

Misting, or gasing, using pesticides

An insecticide, for example, Pestigas or pyrethrum, is applied to an area as a mist or aerosol.

Residual sprays

A residual spray is one which is applied and remains active for a long period of time. Most household pesticides are not residual sprays: they usually become inactive and lose their toxicity within a matter of hours. Other pesticides, organochlorides and organophosphates can remain active for many years.

Residual sprays are applied to skirting boards, cracks and crevices within the area being treated. When the water dries away, the pesticide remains on the surface, where it is picked up by insects or ingested by insects during grooming.

Baiting

Cockroach, ants or rodent baits.

Fumigation using toxic chemicals

Fumigation is one of the oldest methods of pest control. It allows the pesticide to penetrate areas which would not be affected by other applications. The fumigant, one of many toxic chemicals, is released inside a specially-built chamber, or under a gas-tight tarpaulin. Fumigants are generally broad spectrum pesticides, that is, they kill a wide variety of insects and animals.

Non-toxic fumigation

There are now many methods of disinfesting material without the use of toxic chemicals. Some of these methods are freezing, controlled atmospheres, and oxygen deprivation using a scavenger.

If you have a problem related to attack or damage caused by insects, contact a conservator. Conservators can offer advice and practical solutions.