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5 Cards in this Set
- Front
- Back
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Perfect Density Dependent Factor
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One that never fails to control the increase in population numbers
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Density dependent mortality
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a mortality factor that kills a greater proportion of the population as the population increases
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Economic Injury Level (EIL)
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lowest no. insects causing economic damage / minimum no. insects reducing yield to Gain Threshold
VxIxPxD = C so: P = C / (VxIxD) P = pop dens C = mgmt cost / are ($/Ha) V= market value I = injury units/insect/production unit D = damage / unit injury |
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Gain Threshold
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where cost of control = cost yield loss from insect injury
GT=mgmt cost($/Ha)/market value ($/Bu) will be expressed as Bu/Ha |
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Pheromone plume
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cone-shaped doohickey made of pheromones
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