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Food Preferences of Five Species of Carabids Commonly Found in Iowa Cornfields1

 

作者: Richard L. Best,   Clayton C. Beegle,  

 

期刊: Environmental Entomology  (OUP Available online 1977)
卷期: Volume 6, issue 1  

页码: 9-12

 

ISSN:0046-225X

 

年代: 1977

 

DOI:10.1093/ee/6.1.9

 

出版商: Oxford University Press

 

数据来源: OUP

 

摘要:

Food preferences of 5 species of adult carabids,Scarites substriatus, Evarthrus alternans, Pterostichus chalcites, P. lucublandus, andHarpalus pensylvanicus, were investigated under laboratory conditions. Various plant and animal material, as well as detritus were tested. Dead black cutworm larvae were the most preferred food for all species tested.H. pensylvanicusandE. alternansdid, however, feed on a number of seeds.H. pensylvanicusmay be quite omnivorous in its feeding habits. In general, dead crickets and both live and dead smooth-skinned Lepidoptera larvae were attractive food items, while isopods, phalangids, slugs, and earthworms were not.E. alternans, P. lucublandus, andH. pensylvanicussignificantly preferred dead invertebrates over live ones. The attractiveness of dead animal material has special significance. The application of insecticides, which kill large numbers of insects, may be indirectly poisoning potential predators because of the carabid's willingness to feed on dead or dying insects.

 

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