caa a22 4500 397570910 CHVBK 20180308164841.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.407 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.407 Survival of Diapausing and Nondiapausing Boll Weevlls (Coleoptera: Curculionidae) Subjected to Freezing Temperatures [Elektronische Daten] [J. E. Slosser, R. Montandon, D. R. Rummel, L. T. Wilson, T. W. Fuchs] Boll weevils, Anthonomus grandis grandis Boheman, were subjected to freezing temperatures of 0.0, −2.5, −5.0, −7.5, and −10.0°C in a cold bath. Survival of diapausing and nondiapausing adults was compared after exposures of 2-, 4-, 6-, and 8-h duration. Diapausing and nondiapausing individuals could be separated by exposure to −7.5°C for 6 h; diapausing adults were alive and able to walk after this treatment, whereas nondiapausing adults were dead or unable to stand. In the diapausing group, young boll weevils (36 d old) were more tolerant of freezing conditions than were older (110 d old) boll weevils. In a 2nd test, diapausing adults were exposed to these 5 temperatures for 8-72 h. Boll weevils did not survive exposures ≥40 h duration at −1O.0°C. In a 3rd test, diapausing boll weevils were subjected to temperatures of 0.0, −2.5, −5.0, and −7.5°C for 4, 8, 16, and 24 h/d for 2, 6, 10, 14, and 18 consecutive days. At the end of the daily freezing exposure, adults were removed from the cold bath and held at 4.4°C. No boll weevils survived the treatment combinations of −5.0°C for 24 h/d for 14 d and of −75°C for 16 and 24 h/d for 10, 14, or 18 d. However, temperatures this low for this length of time are not common in the Texas Rolling Plains. In the regression equation relating survival with the various exposure conditions, the linear and quadratic components for temperature were primary variables affecting survival in each of the 3 tests. © 1996 Entomological Society of America Population Ecology nationallicence boll weevil nationallicence freezing temperature nationallicence diapause nationallicence Slosser J. E. Texas A&M University Agricultural Research and Extension Center at Chillicothe-Vernon, Vernon, TX 76385 aut Montandon R. Texas A&M University Agricultural Research and Extension Center at Chillicothe-Vernon, Vernon, TX 76385 aut Rummel D. R. Texas A&M University Agricultural Research and Extension Center at Chillicothe-Vernon, Vernon, TX 76385 aut Wilson L. T. Texas A&M University Agricultural Research and Extension Center at Chillicothe-Vernon, Vernon, TX 76385 aut Fuchs T. W. Texas A&M University Agricultural Research and Extension Center at Chillicothe-Vernon, Vernon, TX 76385 aut Environmental Entomology Oxford University Press 25/2(1996-04-01), 407-415 0046-225X 25:2<407 1996 25 ee https://doi.org/10.1093/ee/25.2.407 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.407 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Slosser J. E. Texas A&M University Agricultural Research and Extension Center at Chillicothe-Vernon, Vernon, TX 76385 aut NATIONALLICENCE 700 1- Montandon R. Texas A&M University Agricultural Research and Extension Center at Chillicothe-Vernon, Vernon, TX 76385 aut NATIONALLICENCE 700 1- Rummel D. R. Texas A&M University Agricultural Research and Extension Center at Chillicothe-Vernon, Vernon, TX 76385 aut NATIONALLICENCE 700 1- Wilson L. T. Texas A&M University Agricultural Research and Extension Center at Chillicothe-Vernon, Vernon, TX 76385 aut NATIONALLICENCE 700 1- Fuchs T. W. Texas A&M University Agricultural Research and Extension Center at Chillicothe-Vernon, Vernon, TX 76385 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 407-415 0046-225X 25:2<407 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