عنوان مجله
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Journal of Crop Protection
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چکیده
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Leopard moth, Zeuzera pyrina L. (Lepidoptera: Cossidae), is one
of the important woodboring pests whose larvae bore into twigs, branches,
and trunks of various woody species, weakening and sometimes killing trees
or shrubs. Recently it has caused severe losses of walnut trees in Iran. This
pest overwinters as different larval instars inside trees. Overwintering larvae
were collected monthly from October 2020 to March 2021 from Maragheh
walnut orchards, northwestern Iran, to determine the presence of
cryoprotectants and their changes during autumn and winter . Overwintering
larvae accumulated sorbitol, trehalose, and myo-inositol during winter.
During cold months there was approximately 11 fold and 7.5-fold increase
in trehalose and sorbitol contents, respectively. Glycogen content was the
highest in October and decreased significantly with decreasing ambient
temperature. Our results suggest that the accumulation of sorbitol, trehalose,
and myo-inositol plays an important role in the harsh-season survival of Z.
pyrina.
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