Systematic chemical control is giving way to interventions limited in
both number and area, through better knowledge of population dynamics.
Insecticide application methods need to be diversified and selective
products found. Agronomical techniques have been developed (e.g. Oryct
es) to limit pest populations. It is important to protect and encourag
e the development of predators (case of the Pseudotheraptus - Oecophyl
la complex) and parasitoids by increasing the number of attractive pla
nts (Solanaceae - Malvaceae). Entomopathogenic organisms:fungi and esp
ecially viruses, discovered in 39 lepidopteran species, can sometimes
be used to replace chemical insecticides. Lastly, semiochemical substa
nces (kairomones and aggregation and sexual pheromones) can also be in
cluded in integrated control programmes.