Compatibility of Zoophthora phytonomi (Entomophthorales: Entomophthoraceae) and Bathyplectes anurus (Hymenoptera: Ichneumonidae) in Kentucky Alfalfa Fields
| Autor: | B. C. Pass, G. L. Nordin, John C. Parr |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Veterinary medicine
Ecology biology ved/biology Weevil fungi ved/biology.organism_classification_rank.species Biological pest control Parasitism biology.organism_classification Parasitoid Ichneumonidae Insect Science Botany Entomophthorales Hypera postica Zoophthora Ecology Evolution Behavior and Systematics |
| Zdroj: | Environmental Entomology. 22:674-678 |
| ISSN: | 1938-2936 0046-225X |
| Popis: | This study was conducted to determine the effect of the fungus Zoophthora phytonomi (Arthur) on rates of parasitism by Bathyplectes anurus (Thomson) and B. curculionis (Thomson). These Bathyplectes species parasitized an average of 38.6 ± 1.96 and 14.0 ± 2.21% of the alfalfa weevils, Hypera postica (Gyllenhal), dissected during 1989 and 1990, respectively. However, B. curculionis parasitized only 0.15% of the 3,200 alfalfa weevil larvae reared during this study. Peak host density coincided with peak rates of parasitism by B. anurus for reared larvae and occurred ≈3 d before the peak rate of parasitism for dissected larvae. Peak incidence of parasitism for both reared and dissected larvae occurred ≈6 d before the peak in the epizootic of Z. phytonomi. Z. phytonomi indirectly caused high mortality of B. anurus after peak rates of parasitism and peak host density during 1989. B. anurus and the fungal pathogen have coexisted for 10 yr in central Kentucky with no apparent long-term reduction of B. anurus . |
| Databáze: | OpenAIRE |
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