Tolerance Of Different Species And Varieties Of Plants To Naphthalene Vapor

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Abstract
One hundred and fifty species and varieties of plants were tested to determine their tolerance to naphthalene fumigation with concentrations of 1.5 ounces and 2 ounces for each 1,000 cubic feet of greenhouse space. Dahlia proved to be one of the most tolerant species. Single fumigations at the higher concentration were effective in the control of red spider (Tetranychus telarius), two species of thrips (Heliothrips femorolis and Thrips tabaci) and a slug (Limax maximus). At the lower concentration repeated fumigations at intervals of 4 or 5 days were necessary to obtain satisfactory control.

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