Spatial distribution of Phyllophaga implicita (Horn) (Coleoptera: Scarabaeidae) larvae in relation to distance from the adult food source

The spatial distribution of the Phyllophaga implicita (Horn) larval population in relation to the distance from the adult food source was investigated. Commercial soybean fields with 1 of 4 different shelterbelt arrangements were sampled in the fall of 1993, 1994, and 1995 to assess P. implicita dis...

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Bibliographic Details
Published in:Journal of economic entomology 1998-04, Vol.91 (2), p.457-463
Main Authors: Glogoza, P.A. (North Dakota State University, Fargo, ND.), Weiss, M.J, Rao, M.B
Format: Article
Language:English
Subjects:
Biological and medical sciences
Coleoptera
Fundamental and applied biological sciences. Psychology
Generalities
GLYCINE MAX
LARVAE
NORTH DAKOTA
PHYLLOPHAGA
Phyllophaga implicita
Phytopathology. Animal pests. Plant and forest protection
POPULATION DENSITY
Protozoa. Invertebrates
SAMPLING
Scarabaeidae
SHELTERBELTS
SPATIAL DISTRIBUTION
WINDBREAKS
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Summary:The spatial distribution of the Phyllophaga implicita (Horn) larval population in relation to the distance from the adult food source was investigated. Commercial soybean fields with 1 of 4 different shelterbelt arrangements were sampled in the fall of 1993, 1994, and 1995 to assess P. implicita distribution and density. Larvae were found only in fields with bordering shelterbelts. Ninety percent or more of the specimens were collected within 55 m of the shelterbelts. Exponential models indicated a significant relationship between larval density and distance from the shelterbelts, with densities declining as distance increased. Logistic regression analyses were performed to assess models for predicting the probability of finding larval infestations. A positive association between the probability of finding larvae and the distance from the shelterbelt was found. With P. implicita having a 3-yr life cycle, the 1993 season was the flight year for the largest of the 3 broods. Sampling guidelines based on higher densities of larvae nearer the shelterbelts are discussed
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/91.2.457