Effect on non-host plants on movements of Colorado potato beetle, Leptinotarsa decemlineata (Say)
Movements of Colorado potato beetles, Leptinotarsa decemlineata, (Say) (Coleoptera: Chrysomelidae) were studied in experimental plots of potatoes planted in monocultures and in polycultures with beans and/or marigolds. Rates of movement into and out of plots of varying plant composition were measured by mark-recapture of adult beetles. The amount of emigration was not affected by the presence of non-host plants. However, there were significantly more beetles moving into the pure stands of potatoes than into the plots containing non-host plants. This pattern is consistent with the idea that non-host plants act to mask host plants from potential herbivores, but do not affect the insect once it has located a host plant. It is thus unlikely that marigolds or beans repel Colorado potato beetles, since an increase in emigration would be expected if this were true. Beans are more effective than marigolds at deterring immigration, and both non-host plants together have an additive effect greater than one alone.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5297553
- Report Number(s):
- BNL-51534; ON: DE82016612
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
54 ENVIRONMENTAL SCIENCES
INSECTS
PEST CONTROL
SOLANUM TUBEROSUM
CULTIVATION TECHNIQUES
BEHAVIOR
EXPERIMENTAL DATA
PHASEOLUS
ANIMALS
ARTHROPODS
CONTROL
DATA
INFORMATION
INVERTEBRATES
LEGUMINOSAE
NUMERICAL DATA
PLANTS
SOLANUM
553000* - Agriculture & Food Technology
510100 - Environment
Terrestrial- Basic Studies- (-1989)