caa a22 4500 397572042 CHVBK 20180308164844.0 cr unu---uuuuu 161202e19960801xx s 000 0 eng 10.1093/ee/25.4.767 doi (NATIONALLICENCE)oxford-10.1093/ee/25.4.767 Temperature Dependent Models To Predict Regional Differences in Corn Rootworm (Coleoptera: Chrysomelidae) Phenology [Elektronische Daten] [Paula M. Davis, Norma Brenes, Leslie L. Allee] Western corn rootworms, Diabrotica virgifera virgifera LeConte, only recently have become a serious corn pest in New York and other states in the Northeast. Because soil conditions, topography, and climate differ from the Midwest corn belt, questions arose as to the validity of previously published phenology models. Our study evaluated larval occurrence and adult emergence of western and northern corn rootworm, D. barberi Smith & Lawrence, in 11 fields in central New York during 1991 (2 fields), 1992 (3 fields), and 1993 (6 fields). Logistic regression models predicted cumulative occurrence/emergence from Julian date or degree-day accumulations calculated from either soil (base 11°C) or air temperatures. Air temperature degree-days were calculated for minimum thresholds ranging from 1-16°C. Additional accumulations were determined by varying the maximum developmental threshold from 1°C above the lower threshold to 30°C. Minimum thresholds in the latter series of calculations were set equal to 4, 6, 9, and 11°C. Julian date was a relatively poor predictor of all immature and adult stages. However, accuracy of air temperature models was dependent on choice of thresholds. The best fitting air temperature models either used minimum developmental thresholds near 6°C for immature stages and 1-2°C for adult emergence or calculated degree-days using a minimum threshold of 11°C and a maximum threshold of 18°C. Both soil and air temperature models indicated regional differences in immature development and adult emergence. Although site-specific models gave the best prediction of western corn rootworm adult emergence, adult emergence at New York and Illinois sites could be predicted by adjusting daily air temperature degree-days by the expected accumulations from 1 January to 30 September. © 1996 Entomological Society of America Population Ecology nationallicence Diabrotica virgifera virgifera nationallicence Diabrotica barberi nationallicence development nationallicence degree-day models nationallicence Davis Paula M. Department of Entomology, Cornell University, Ithaca, NY aut Brenes Norma Department of Entomology, Cornell University, Ithaca, NY aut Allee Leslie L. Department of Entomology, Cornell University, Ithaca, NY aut Environmental Entomology Oxford University Press 25/4(1996-08-01), 767-775 0046-225X 25:4<767 1996 25 ee https://doi.org/10.1093/ee/25.4.767 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.4.767 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Davis Paula M. Department of Entomology, Cornell University, Ithaca, NY aut NATIONALLICENCE 700 1- Brenes Norma Department of Entomology, Cornell University, Ithaca, NY aut NATIONALLICENCE 700 1- Allee Leslie L. Department of Entomology, Cornell University, Ithaca, NY aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/4(1996-08-01), 767-775 0046-225X 25:4<767 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford