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Title: 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.
Authors:
Publication Date:
OSTI Identifier:
5297553
Report Number(s):
BNL-51534
ON: DE82016612
DOE Contract Number:
AC02-76CH00016
Resource Type:
Technical Report
Research Org:
Brookhaven National Lab., Upton, NY (USA)
Country of Publication:
United States
Language:
English
Subject:
60 APPLIED LIFE SCIENCES; 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)