Helping citrus tough it out.
Immature citrus peels shield against fruit fly attack--but only to a point. For a while, oils in the peels kill fruit fly eggs and larvae; the toughness of these peels also discourages fly attack. However, as it ripens, the peel softens and its oil content diminishes--signaling the flies to come and feast.
Now scientists at the Agriculture Department's Insect Attractants, Behavior and Basic Biology Lab in Gainesville, Fla., report laboratory tests showing a partial solution: spraying fruit with gibberellic acid, a natural plant hormone, before the fruit turns from green to its ripe color. This, they say, maintains the tough peel--and fly resistance--in ripening fruit.
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|Title Annotation:||spraying with gibberellic acid maintains fruit fly resistance|
|Date:||Oct 25, 1986|
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