G. Gould

Variation in Eastern Cottonwood (Populus deltoides Bartr.) phloem sap content and toughness due to leaf development may affect feeding site selection behavior of the aphid, Chaitophorous populicola Thomas (Homoptera: Aphididae)
Gould, G. G., Clive G. Jones, P. Rifleman, A. Perez, and J. S. Coleman. 2007. “Variation in Eastern Cottonwood (Populus Deltoides Bartr.) Phloem Sap Content and Toughness Due to Leaf Development May Affect Feeding Site Selection Behavior of the Aphid, Chaitophorous Populicola Thomas (Homoptera: Aphididae)”. Environ. Entomol. 36: 1212-25. http://www.caryinstitute.org/reprints/Gould_et_al_2007_Variation_Envir_Ent_36_1212-1225.pdf.