期刊
JOURNAL OF ECONOMIC ENTOMOLOGY
卷 111, 期 2, 页码 542-548出版社
OXFORD UNIV PRESS INC
DOI: 10.1093/jee/tox372
关键词
entomopathogenic nematodes; western corn rootworm; Steinernema; Heterorhabditis
类别
资金
- Monsanto Insect Management Knowledge Research Program grant
- USDA Agricultural Research Service project Insect Biotechnology Products for Pest Control and Emerging Needs in Agriculture [5070-22000-037-00-D]
Larval Diabrotica virgifera virgifera LeConte (Coleoptera: Chrysomelidae) were exposed to seven different entomopathogenic nematode species to test their potential infectivity in a laboratory setting. Known D. virgifera-infecting nematode species Heterorhabditis bacteriophora Poinar, Heterorhabditis megidis Poinar, Jackson & Klein, Steinernema feltiae Filipjev, and Steinernema carpocapsae Weiser were tested in a concerted experiment alongside Steinernema diaprepesi Nguyen & Duncan, Steinernema riobrave Cabanillas, Poinar & Raulston, and a Missouri wild-type H. bacteriophora which have not been previously tested on D. virgifera. The species S. rarum Doucet was tested separately for D. virgifera infectivity. Third-instar D. virgifera were exposed to either 60 or 120 nematodes per larva for 6 d. Following exposure, mortality was recorded and larvae were examined to determine the presence of active nematode infections. Results indicated a significantly higher proportion of larvae with active infections from the Heterorhabditidae species and S. diaprepesi than the other Steinernematidae species for both exposure rates; mortality data indicated a similar trend. Steinernema rarum showed almost no infectivity in laboratory experiments.
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