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The Super-Cooling Point of the Spiralling Whitefly, Aleurodicus dispersus Russell
Abstract:
Laboratory experiments were conducted to the super-cooling point (SCP) for Aleurodicus dispersus Russell. The results showed that the SCP of A. dispersus was varied in different seasons. The SCP of eggs was-23.21°C in spring, which was lowest than others. The SCP of male adult was-11.10°C in winter, which was highest. For individuals, the lowest SCP was 1th instar nymph, the highest was male adults. The sequence of SCP from low to high is eggs <the 1st instar nymph <2nd instar <3rd instar <4th instar <adults. The SCP of eggs and 1st instar nymph were lowest in every season, which lower than adults significantly (P<0.01). The results revealed stronger cold hardiness in egg stages than adults.
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1175-1180
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August 2014
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© 2014 Trans Tech Publications Ltd. All Rights Reserved
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