caa a22 4500 397570554 CHVBK 20180308164840.0 cr unu---uuuuu 161202e19961201xx s 000 0 eng 10.1093/ee/25.6.1371 doi (NATIONALLICENCE)oxford-10.1093/ee/25.6.1371 Skinner R. Howard Great Plains Systems Research, USDA-ARS, Fort Collins, CO 80522 Leaf Temperature Effects on Bemisia argentifolii (Homoptera: Aleyrodidae) Oviposition [Elektronische Daten] [R. Howard Skinner] Little is known about high temperature thresholds for the whitely Bemisia argentifolii Bellows & Perring, which thrives during the hot summers common to the southwestern deserts of the United States. This study addressed 3 questions relating to B. argentifolii thermal responses. (1) What are the maximum, optimum, and minimum leaf temperatures for oviposition rate? (2) Is the optimum temperature for oviposition dependent on temperature effects on insect physiology or on host plant thermal responses? (3) How does B. argentifolii respond to localized temperature gradients across the host plant leaf? Adult B. argentifolii were placed in clip cages that were attached to the abaxial surface of cotton, Gossypium hirsutum L., and cucumber, Cucumis Sativus L., leaves. A temperature gradient was created by either heating or cooling one side of the leaf with water-filled copper tubing placed on the adaxial leaf surface. Minimum and optimum leaf temperatures for oviposition were 16 and 31°C, respectively, and were independent of plant species. No thermal maximum was detected because oviposition occurred at the highest leaf temperature (43°C). Even though oviposition occurred at high temperatures, a stronger than expected preference was shown for the cool side of the leaf temperature gradient. This was true even at lower than optimum temperatures. Thus, even though B. argentifolii appeared capable of reproducing at the highest temperatures commonly encountered in the southwest deserts, they preferred cooler microenvironments, even when temperatures were below optimum for oviposition rate. This response may serve to maximize total egg production by increasing adult longevity. © 1996 Entomological Society of America Population Ecology nationallicence Bemisia argentifolii nationallicence leaf temperature nationallicence oviposition nationallicence Environmental Entomology Oxford University Press 25/6(1996-12-01), 1371-1375 0046-225X 25:6<1371 1996 25 ee https://doi.org/10.1093/ee/25.6.1371 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.6.1371 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Skinner R. Howard Great Plains Systems Research, USDA-ARS, Fort Collins, CO 80522 NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/6(1996-12-01), 1371-1375 0046-225X 25:6<1371 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