Dose-Morality and Large-Scale Studies for Controlling Codling Moth (Lepidoptera: Tortricidae) Eggs on ‘d’Agen’ Plums by Using Methyl Bromide

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Codling moth, Cydia pomonella (L.), eggs on ‘d’Agen’ cultivar of plums, Prunus salicina Lindl., were treated with methyl bromide to determine if a quarantine treatment could be developed so that the plums could be exported to Japan from the United States. Small-scale tests consisted of treating codling moth eggs on plums with various doses of methyl bromide at 20°C for 2 h. Small-scale tests showed that 0- to 24-h-old eggs of codling moth on the plums were controlled by doses >22.5 g/m3. Because testing showed that 48 g/m3 had no adverse effect on the quality of plums, this dose was chosen for large-scale testing to establish the quarantine dose. Large-scale tests consisted of treating plums at 18.5°C for 2 h using methyl bromide at a dose of 48 mg/liter. Large-scale tests showed that the dose of 48 g/m3 killed all 0- to 24-h-old codling moth eggs exposed on plums in packing cartons without affecting the quality of the plums.

Keywords: Cydia pomonella; bioassay; phytotoxicity; quarantine

Document Type: Research Article

Publication date: August 1, 1999

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