Cumulative and actual population size of stored-product pests: Effect of initial numbers and rate of increase
2000
Stejskal, V. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (Czech Republic))
During long-term storage of an agricultural commodity, several generations of stored-product pests can develop and die. As feeding losses are not compensated, the level of damage is not proportional to the current population density (N) but reflects the cumulative number of all individuals (C) since storage began. Therefore, the greater the "C - N difference" is, the greater is the bias in any pest control decision that is based solely on the current population density of the pest. The presented simulation shows that in an exponentially growing population the "C - N difference" depends on the rate of population increase (R) and the initial number of pest individuals (N0).
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