Hippodamia convergens(Coleoptera: Coccinellidae) Dissemination of Dogwood Anthracnose Fungus (Melanconiales: Melanconeacae)
作者:
Deanna M. Colby,
Mark T. Windham,
Jerome F. Grant,
期刊:
Environmental Entomology
(OUP Available online 1995)
卷期:
Volume 24,
issue 5
页码: 1075-1079
ISSN:0046-225X
年代: 1995
DOI:10.1093/ee/24.5.1075
出版商: Oxford University Press
关键词: Hippodamia convergens;dogwood anthracnose;insect dissemination of fungi;Discula;insect-plant interactions
数据来源: OUP
摘要:
The fungal pathogen,Discula destructivaRedlin, has been responsible for the decline or death, or both, of flowering dogwood,Cornus floridaL., in the eastern United States. Our research addressed the role of a selected insect in transportation and dissemination ofD. destructiva. Densities of conidia on adults of our model insect, the convergent lady beetle,Hippodamia convergensGuérin-Ménevile, were quantified using scanning electron microscopy. Significantly more conidia were attached to the ventral body surface than to the dorsal surface. Also, conidia were deposited around trichomes of dogwood leaves exposed to infested convergent lady beetles. Our data demonstrate that our model, the convergent lady beetle, is capable of transporting conidia ofD. destrutctiva. Because conidia may remain viable for 16 d, insects may play an important role in the epidemiology of dogwood anthracnose.
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