Fumigation of Apples to Control the Apple Maggot, Rhagoletis pomonella1

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Fumigation of apples with methyl bromide, ethylene dibromide and ethylene chlorobromide on the varieties Crimson Gravenstein, McIntosh Red, Golden Russet and Red Delicious at temperatures near 60° F. indicated the dosages necessary to kill apple maggot larvae (Rhagoletis pomonella (Walsh)) and the resulting fruit injury. Methyl bromide at dosages high enough to kill the maggots caused injury to Gravenstein and McIntosh apples, while high mortality with ethylene dibromide and ethylene chlorobromide was achieved at dosages that caused no injury and did not affect the storage of the fruit. No injury to Red Delicious or (;olden Russet apples occurred in any of the tests.

Fruit treated 1 week after harvest but not placed in cold storage showed less injury than fruit treated immediately after harvest and after being in cold storage 1, 3 or 6 weeks. Apples that were treated with ethylene dibromide and ethylene chlorobromide at the 3- and 6-week periods showed less injury than those treated immediately after harvest and 1 week later from cold storage. No differences in fruit injury were found owing to the type of package or to the position within it.

Document Type: Research Article

Publication date: October 1, 1962

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