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Why aphid virus retention needs more attention: Modelling aphid behaviour and virus manipulation in non-persistent plant virus transmission

Fig 3

Probability tree of aphid landing, probing and feeding behaviour upon which the expression for , the rate of aphid infectivity loss, in the MIP-BAR model is based.

It gives probabilities for each stage of the process (from left to right) from when an infective aphid disperses (with rate , Eq 14) through (a) landing, (b) probing and (c) feeding on or rejecting a new plant, which results in the aphid either maintaining or losing the virus (i.e. its infectivity). Red arrows = paths that lead to the aphid losing infectivity (which when combined create , Eq 20). Green arrows = paths that lead to infectivity retention by the aphid. S = number of susceptible plants. I = number of infected plants. ρ = probability of infectivity loss from probing. a = probability of virus acquisition from probing an infected plant. ω = probability of feeding on a plant. v = degree of virus-induced plant attractiveness. ε = degree of virus-induced plant acceptability.

doi: https://doi.org/10.1371/journal.pcbi.1012479.g003