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Density yield relationships and economic injury level model for the Colorado potato beetle larvae on potatoes
Author(s) -
Mailloux G.,
Binns M. R.,
Bostanian N. J.
Publication year - 1991
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02514577
Subject(s) - pest analysis , biology , larva , stalk , yield (engineering) , colorado potato beetle , crop , economic threshold , agronomy , crop loss , horticulture , botany , materials science , metallurgy
Summary A three year study revealed that the relationship between the density of Colorado potato beetle larvae per stalk and a decrease in the yield of potatoes can be described by a model comprised of two straight lines. Potato cv. Superior was found to have a damage boundary of 12 larvae per stalk, which is the maximum level of injury or pest density below which no noticeable yield loss occurs. The economic injury level was estimated as a function of larval density in relation to yield, cost of protection, efficacy of treatment, value of the crop and expected harvest in the absence of any loss.