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Cold hardiness of Corythucha marmorata (Hemiptera: Tingidae) on the functional crop Helianthus tuberosus
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Cold hardiness of Corythucha marmorata (Hemiptera: Tingidae) on the functional crop Helianthus tuberosus
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Journal Article
Cold hardiness of Corythucha marmorata (Hemiptera: Tingidae) on the functional crop Helianthus tuberosus
2025
Overview
The invasive phytophagous lace bug,
Corythucha marmorata
, threatens the functional food crop
Helianthus tuberosus
, but its overwintering ecology on this plant is poorly understood. This study evaluated the cold hardiness of
C. marmorata
at various life stages, focusing on the differences between female and male adults.
C. marmorata
overwinter as adults on
H. tuberosus
, based on a four-year winter field investigation. The supercooling and equilibrium freezing points of
C. marmorata
decline with development. Female adults showed the greatest supercooling capacity. The lower lethal temperature (female − 15 °C, male − 16 °C) is above the supercooling point (− 26 °C). The low temperature exposure mortality of
C. marmorata
female and male adults exhibited different regularities. We conclude that
C. marmorata
belongs to chill susceptible insects. October to February is the most recommended period for
C. marmorata
control by harvesting
H. tuberosus
. Weed removal, such as
Erigeron bonariensis
,
Erigeron canadensis
, and
Ambrosia trifida
, is an early control measure. These results enhance our understanding of
C. marmorata
’s cold tolerance and inform targeted pest management strategies for
H. tuberosus
crops.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
