European Corn Borer (Lepidoptera: Pyralidae) Larvae as Vectors of Fusarium moniliforme, Causing Kernel Rot and Symptomless Infection of Maize Kernels
Authors: Sobek, E. A.; Munkvold, G. P.
Source: Journal of Economic Entomology, Volume 92, Number 3, June 1999 , pp. 503-509(7)
Publisher: Entomological Society of America
Abstract:Field and greenhouse experiments were conducted to assess the ability of Ostrinia nubilalis (Hübner) larvae to act as vectors of Fusarium moniliforme J. Sheld. from maize leaf surfaces to kernels. Leaf surfaces of plants in the dough stage were sprayed with a spore suspension of F. moniliforme strain EA-2, after which plants were manually infested with O. nubilalis larvae or kernels were mechanically wounded. In 2 greenhouse experiments, O. nubilalis larvae significantly increased incidence of kernel rot symptoms and symptomless infection. Strain EA-2 was detected on O. nubilalis larvae, in plant debris in the leaf axils, and in 28–39% of F. moniliforme-infected kernels from plants manually infested with O. nubilalis. In the field, O. nubilalis infestation significantly increased incidence of kernel rot symptoms (1995) and symptomless infection (1994 and 1995). Symptomless infection was highest for treatments in which larvae were artificially contaminated with F. moniliforme strain EA-4 prior to manual infestation of plants. F. moniliforme strain EA-2 (from leaf surfaces) and strain EA-4 (from larvae) were recovered from kernels in the O. nubilalis-infested treatments in 1995. Results indicated that O. nubilalis larvae can act as vectors of F. moniliforme, increasing symptoms of Fusarium kernel rot and symptomless infection of kernels by F. moniliforme. Kernel wounding also is an important factor contributing to this disease.
Document Type: Research Article
Publication date: June 1, 1999
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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