Resistance Definition Resistance may be defined as ‘a heritable change in the sensitivity of a pest population that is reflected in the repeated failure of a product to achieve the expected level of control when used according to the label recommendation for that pest species’. Cross-resistance occurs when resistance to one insecticide confers resistance to another insecticide, even where the insect has not been exposed to the latter product. Clearly, because pest insect populations are usually large in size and…
…this level, simple models including a handful of variables are probably enough. Models which would involve population density plus interaction with the environment would need additional parameters, including interaction parameters. There are also different schools of modelling and they have a relation with the level of granularity in which researchers are interested in exploring: Some models, in fact, don’t even require simulations to be run as their components can be sufficiently well described by a series of equations, which in…