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The Elm Leaf Beetle,Pyrrhalta luteola1, in Southern California: Its Host Preference and...
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The Elm Leaf Beetle,Pyrrhalta luteola1, in Southern California: Its Host Preference and Host Impact
作者:
Robert F. Luck,
Glenn T. Scriven,
期刊:
Environmental Entomology
(OUP Available online 1979)
卷期:
Volume 8,
issue 2
页码: 307-313
ISSN:0046-225X
年代: 1979
DOI:10.1093/ee/8.2.307
出版商: Oxford University Press
数据来源: OUP
摘要:
Five groups of 20 elm leaf beetle (ELB) larvae,Pyrrhalta luteola(Müller) and 20 prs (♂ and ♀) of ELB adults were reared on leaves from 4 elm species: one group each on American elm (Ulmus americanaL.), English elm (U. proceraSalisb.), Siberian elm (U. pumilaL.), and on new (currently growing) and old leaves of Chinese elm (U. parvifoliaJacq.). English elm leaves produced the highest larval survivorship (70%), but the shortest adult life expectancy; Siberian and American elm leaves produced low larval survivorship (25 and 15%, respectively), but caused the longest life expectancy of adults. ELB larvae failed to survive when fed old leaves of Chinese elm, while those fed new leaves exhibited low levels of larval and adult survivorship. Thus, the 4 species may be ranked from most to least susceptible as follows: English, Siberian, American, and Chinese elm. These results generally reflect those reported previously with the exception of Chinese elm. The most important host in southern California is Siberian elm because it is so widely planted. English elm, although more vulnerable, is an infrequently planted species in the area.
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