Strawberry Root Weevil Economic Injury Level + Sequential Sampling Calculator

At what root weevil densities should I consider treatment/no treatment?

This utility program provides a simple way to determine if and when to treat strawberry root weevil in peppermint, for Oregon and areas where conditions are similar. You need to know: the cost of treatment, the price of peppermint oil, the percent kill, and, if you have already taken soil samples, how many.

What is estimated is the current economic injury level, defined as the density of pest expected to cause crop loss equal to the cost of treatment to prevent that crop loss. Also, if you are sampling (during April and May), a sequential sampling table with decision guidelines is presented to let you know if you either need to 1) Treat, 2) Don't Treat, or 3) Continue to take more samples. Use the help buttons [ ? ] for more information on all inputs, outputs, and calculations.

This Economic injury level/sequential sampling calculator is based on the version in IPMP 2.0 'Insect Pest Management in Peppermint', developed for peppermint growers and their advisors. It assumes that you are sampling all stages of strawberry root weevils from peppermint during the spring months April and May, and that treatment is directed before pupation is significant.

This calculator was written to support decsion making for management of peppermint pests in Oregon and elsewhere in the USA. The calculations made in this Javascript program are based upon research conducted at Oregon State University. The purpose of this program is to demonstrate that some of the utilities included in IPMP 2.0 can be provided over the internet. This program has no implied warranties of any kind. Use this information at your own risk.

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EMAIL: Leonard Coop, Research Associate

EMAIL: Ralph Berry, Professor of Entomology

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Last update - 5/1/96