Authors:W. D. James, A. T. Showler, J. K. Westbrook and J. S. Armstrong
Stable isotope markers have been used to study animal nutrition for several decades and more recently to study the foraging
and cultural habits of imported fire ants. In this work, we have extended that effort to evaluate the potential for marking
boll weevils, Anthonomus grandis grandis Boheman (Coleoptera: Curculionidae), with the rare earth element samarium to aid in studies of insect invasion and pest eradication protocols. Neutron activation
analysis (NAA) was performed on the marked boll weevils as well as plant material from the cotton squares on which the insects
were fed. Samarium levels in non-dosed insects average about 20 ng/g or about 100 pg total element per insect. Our computed
average determination limit was 36 pg samarium/weevil. The determination limit for cotton plant squares and leaves averaged
3.5 ng/g and 8.2 ng/g, respectively. These initial results indicate the NAA method is capable of identifying individual marked
insects which have assimilated 1 ng of samarium, a ten-fold increase in content over average blank values.
Authors:Xinfang Mao, Zhongyuan Liu, Honglei Li, Ji Ma and Fuchun Zhang
are considered to directly interact with one or more planes of a growing ice crystal. The ice lattice mimicry found in most AFPs is considered essential for their ice-binding function [ 12 – 14 ].
The beetle Anatolica polita (Coleoptera
Authors:Árpád Illés, Csaba Bojtor, Seyed Mohammad Nasir Mousavi, L. Csaba Marton, Péter Ragán and János Nagy
western corn rootworm belongs to the class of insects (Insecta), the order of the beetles (Coleoptera), and the family of leaf beetles (Chrysomelidae) ( Leconte, 1868 ). It is a species of tropical origin with a gene center in Mexico ( Smith, 1966 ); its