Regresar

Modelling and control of non-persistent plant virus transmission for annual production cycles

Abstract:

When an insect carrying a non-persistent virus punctures a plant it loses part, or may be all, of its viral load. Using a differential equation model, we show that this is a critical factor affecting disease incidence levels when crops are under annual production cycles. Computer simulations suggest that relatively low vector pressure at the beginning of planting cycles decrease the disease progression. The model provides also approximations to disease incidences in subsequent plantings. Conditions for incidences to decrease or increase in time are supplied, which may be useful to assess the impact of some control strategies. © KNPV 2009.