Experimental assessment of interactions between larval Coleomegilla maculata and Coccinella septempunctata (Coleoptera: Coccinellidae) in field cages

This experimental field study examined the interactions between larvae of Coccinella septempunctata L., an introduced Palearctic species, and Coleomegilla maculata (Degeer), a Nearctic species. The interactions were examined in 5.8-m3 field cages enclosing potatoes infested with Myzus persicae (Sulz...

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Bibliographic Details
Published in:Environmental entomology 1998-10, Vol.27 (5), p.1280-1288
Main Authors: Obrycki, J.J. (Iowa State University, Ames, IA.), Giles, K.L, Ormord, A.M
Format: Article
Language:English
Subjects:
Biological and medical sciences
BIOLOGICAL COMPETITION
Biological control
BIOLOGICAL DEVELOPMENT
COCCINELLA SEPTEMPUNCTATA
COCCINELLIDAE
Coleomegilla maculata
COMPETENCIA BIOLOGICA
COMPETITION BIOLOGIQUE
Control
DENSIDAD DE LA POBLACION
DENSITE DE POPULATION
DEPREDACION
DEPREDADORES
DESARROLLO BIOLOGICO
DEVELOPPEMENT BIOLOGIQUE
Fundamental and applied biological sciences. Psychology
INSECTE NUISIBLE
INSECTOS DANINOS
INTERSPECIFIC COMPETITION
INTRAGUILD PREDATION
INTRASPECIFIC COMPETITION
MYZUS PERSICAE
PESO
PEST INSECTS
Phytopathology. Animal pests. Plant and forest protection
POIDS
POPULATION DENSITY
PREDATEUR
PREDATION
PREDATORS
Protozoa. Invertebrates
SOLANUM TUBEROSUM
SUPERVIVENCIA
SURVIE
SURVIVAL
WEIGHT
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Summary:This experimental field study examined the interactions between larvae of Coccinella septempunctata L., an introduced Palearctic species, and Coleomegilla maculata (Degeer), a Nearctic species. The interactions were examined in 5.8-m3 field cages enclosing potatoes infested with Myzus persicae (Sulzer) (Homoptera: Aphididae). Intra- and interspecific interactions were compared by using 4 measurements: developmental time and survival from 1st instar to adult, adult weight for each coccinellid species, and M. persicae density. No significant differences were found between intra- and interspecific treatments in C. maculata survival: 19.6 and 18.3%, in 1992 and 5.7 and 3.3%, in 1993, respectively; or developmental time: 24.6 and 25.4 d in 1992 and 20.4 and 20.6 d in 1993, respectively. In 1992, no significant differences were observed between the intra- and interspecific treatments in C. septempunctata survival (38.3 and 39.2%) or developmental time (20.0 and 20.5 d). In 1993, no C. septempunctata survived to adults at the relatively lower prey densities. Interspecific interactions between C. septempunctata and C. maculata larvae did not significantly affect M. persicae density, compared with densities in intraspecific cages
ISSN:0046-225X
1938-2936
DOI:10.1093/ee/27.5.1280