Predictive model for strawberry bud weevil (Coleoptera: Curculionidae) adults in strawberry fields

• Published in: Environmental entomology Vol. 28; no. 3; pp. 398 - 406
• Main Authors: Bostanian, N.J, Binns, M, Kovach, J, Racette, G, Mailloux, G
• Format: Journal Article
• Language: English
• Published: Oxford, UK Oxford University Press 01-06-1999; Entomological Society of America
• Subjects: adults; Anthonomus; Anthonomus signatus; Biological and medical sciences; chlorpyrifos; Curculionidae; cypermethrin; Fragaria ananassa; Fundamental and applied biological sciences. Psychology; heat sums; insect control; Phytopathology. Animal pests. Plant and forest protection; population density; prediction; probabilistic models; Protozoa. Invertebrates; Records, symptoms, damages, economic importance, population surveys; sampling; New York; Quebec; adult abundance; management; predictive model; Fragaria; Insecticide; Coleoptera; Small fruits; Insecta; Pesticides; Rosaceae; Anthonomus signatus; Method; Forecast model; Population decline; Pest; Efficiency; Arthropoda; Dicotyledones; Angiospermae; Spermatophyta; Curculionidae; Invertebrata; Sampling
• ISSN: 0046-225X; 1938-2936
• DOI: 10.1093/ee/28.3.398

Three different sampling methods (sweep net, D-Vac, tapping into a carton container) were evaluated for Anthonomus signatus Say in strawberry fields. The results suggest that sampling with a sweep net reflects population numbers best. A predictive model for adult abundance was developed to describe and predict population build-up. The strawberry fields used in the study were in their 2nd yr of production. Overwintering adults generally begin to appear in a strawberry field approximately equal to 300 cumulative degree-days (DD) calculated from 1 April at temperatures above 0 degrees C. These weevils attain maximum abundance anywhere from 500 to 670 DD. Within that interval, a treatment with cypermethrin or chlorpyriphos was effective against this pest. The summer generation attained maximum abundance anywhere from 1,250 to 1,650 DD. A treatment with chlorpyriphos at 1,679 DD reduced the summer generation of weevils and decreased clipped buds in the field the following year.