Abstract
AbstractDistribution of grasshopper populations was examined on a rural municipality (RM) basis over a 44-year period in Saskatchewan. A two-state Markov chain probability model was used to describe the transitional probabilities from high or low populations for different time steps. The analysis showed significant persistence of grasshopper populations in particular locations but the degree of persistence varied between RMs. The probability model was used to determine the expected duration of outbreaks or recessions. The potential usefulness of estimates of the expected duration of an outbreak is discussed in relation to crop protection.
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