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PECAN WEEVIL, CURCULIO CARYAE (COLEOPTERA: CURCULIONIDAE): 2. ESTIMATION OF ADULT POPULATIONS12

Published online by Cambridge University Press:  31 May 2012

D. J. Boethel ,
R. D. Morrison  and
R. D. Eikenbary
D. J. Boethel
Affiliation:
Oklahoma Agricultural Experiment Station, Stillwater
R. D. Morrison
Affiliation:
Oklahoma Agricultural Experiment Station, Stillwater
R. D. Eikenbary
Affiliation:
Oklahoma Agricultural Experiment Station, Stillwater
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Abstract

Data obtained by sampling studies during 1972 and 1973 were used to develop equations for predicting the number of adult pecan weevils, Curculio caryae (Horn), in a tree from the number of pecan weevils trapped beneath that tree on a given date. Two of the models then were tested to determine their effectiveness in estimating weevil populations.

When the population estimates obtained from the model built from the early season data in 1972 (model A) were compared with the actual populations found in the trees in 1973, it was found that 71.7% of the observed values in 1973 fell within the 95% confidence intervals for the predicted values. When similar comparisons were made utilizing the model built from early season data in 1973 (model C), 95% of the observed population values in 1972 fell within the confidence intervals for the predicted values. Three-dimensional response surfaces generated from the models were similar and revealed that as the season progressed, the number of pecan weevils predicted from any trap value increased at an increasing rate.

Type
Articles
Information
The Canadian Entomologist , Volume 108 , Issue 1 , January 1976 , pp. 19 - 22
Copyright
Copyright © Entomological Society of Canada 1976

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References

Boethel, D. J., Eikenbary, R. D., Morrison, R. D.. and Criswell, J. T.. 1976. Pecan weevil, Curculio caryae (Coleoptera: Curculionidae). 1. Comparison of adult sampling techniques. Can. Ent. 108: 11–18.CrossRefGoogle Scholar
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Gonzalez, D. 1970. Sampling as a basis for pest management strategies. Proc. Tall Timbers Conf. Ecol. Animal Control Habitat Manag. 2: 83–101.Google Scholar
Raney, H. G., Eikenbary, R. D., and Flora, N. W.. 1970. Population density of the pecan weevil under Stuart pecan trees. J. econ. Ent. 63: 697–700.CrossRefGoogle Scholar