Here are some of the main characteristics that cockroach baiting programmes needs to have in order to be efficient:
- To be attractive, bait must contain nutrients that are both limited and unique in the urban area;
- Cockroaches select nutrients to correct deficiencies from feeding on unbalanced food;
- Baits should provide a complete and balanced food component to optimise success;
- Cockroaches eat cockroach faeces to gain nutrients necessary for survival;
- Slower actives provide increased access to vomitus and improve secondary mortality;
- Resistance in a cockroach population may increase if baits fall short of being lethal.
For a bait to be attractive when placed in urban areas with many competing food sources; it must contain nutrients that are both limited and unique in the environment. The nutritional value of foods has a very significant impact on cockroach development and reproduction.
Given the relatively simplistic nerve structure of cockroaches; with the brain a supra-oesophageal nerve ganglion (cluster of nerves) formed by the fusion of three pairs of ganglia; it is surprising to learn that cockroaches are actually able to self-select the nutrients they require to correct nutrient; deficiencies that arise from feeding on unbalanced food sources.
The transfer of cockroach bait toxicants has arisen through the development of improved bait technologies. At the same time, a degree of mythology has arisen surrounding toxicant transfer, that is often not supported by scientific data.
Toxicant transfer is dependent upon cockroaches that have fed upon a bait; contaminating their environment with toxicant laden faeces and vomitus; which is then consumed by other cockroaches. This transfer or secondary distribution of the toxicant is most important in the control of the more sedentary life stages; specifically gravid females and early stadia nymphs.
There are few documented scientific reports of control failure of cockroach bait products; containing the more recently developed active constituents, due to physiological resistance. When cockroaches feed on a quality bait, the active is consumed at significantly higher doses than those required to kill.
The frequency of a resistance gene within a German cockroach population may increase; if some cockroaches survive sub-lethal exposure to baits. This may occur through the ingestion of lower doses of insecticide from cockroach excretion.
If you are looking for Pest Control Specialists to take care of cockroach removal on your property, don’t hesitate to call us at 0800 955 1015.
Credit for image and full article on BPCA.