caa a22 4500 397571992 CHVBK 20180308164844.0 cr unu---uuuuu 161202e19960801xx s 000 0 eng 10.1093/ee/25.4.859 doi (NATIONALLICENCE)oxford-10.1093/ee/25.4.859 Potential of Ice-Nucleating Active Bacteria for Management of the Red Imported Fire Ant (Hymenoptera: Formicidae) [Elektronische Daten] [Camille E. Landry, Sherman A. Phillips] Overwintering strategies are important in the survival of insects, and one such strategy involves the regulation of temperatures at which they freeze. Although all insects exhibit some degree of cold tolerance, they can generally be classified as either freeze tolerant or intolerant. Many freeze-intolerant insects seasonally depress their supercooling points, thereby increasing their cold-hardiness in preparation for winter. This study was conducted to assess the influence of cold acclimation on the supercooling ability of the red imported fire ant, Solenopsis invicta Buren. Colonies were consecutively exposed for 7 d each to decreasing temperatures of 10, 5, and 0°C. At the end of each 7-d interval, a thermocouple probe was used to determine whole body supercooling points of randomly selected worker ants from each colony. Analysis of variance indicated a significant difference among supercooling points and acclimation temperatures. In the 1970s, ice-nucleating active bacteria, a new category of biological ice-nucleators, were discovered among other epiphytic bacteria living on the surface of plants. These ice-nucleating bacteria have the capacity to catalyze ice formation at −1 to −2°C. We investigated the effects of topical mist application of the ice-nucleating active bacteria Pseudomonas syringae on the freezing point of minor and media worker ants. Treatment with P. syringae increased the temperature at which the red imported fire ant froze, thus decreasing its supercooling ability. © 1996 Entomological Society of America Biological Control nationallicence Solenopsis invicta nationallicence cold acclimation nationallicence ice-nucleating active bacteria nationallicence Landry Camille E. Department of Plant & Soil Science, Texas Tech University, Lubbock, TX 79409-2134 aut Phillips Sherman A. Department of Plant & Soil Science, Texas Tech University, Lubbock, TX 79409-2134 aut Environmental Entomology Oxford University Press 25/4(1996-08-01), 859-866 0046-225X 25:4<859 1996 25 ee https://doi.org/10.1093/ee/25.4.859 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.4.859 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Landry Camille E. Department of Plant & Soil Science, Texas Tech University, Lubbock, TX 79409-2134 aut NATIONALLICENCE 700 1- Phillips Sherman A. Department of Plant & Soil Science, Texas Tech University, Lubbock, TX 79409-2134 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/4(1996-08-01), 859-866 0046-225X 25:4<859 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