TY - JOUR
T1 - Enzyme polymorphism in the corn earworm, heliothis zea (lepidoptera: Noctuidae). Hemolymph esterase polymorphism
AU - Sell, Douglas K.
AU - Whitt, Gregory S.
AU - Metcalf, Robert L.
AU - Lee, Lu Ping Kan
N1 - Funding Information:
Financial support for this study came from Illinois Agricultural Experiment Station Regional Research Funds in conjunction with Southern Regional Project S-59: Distribution, Abundance, and Control of Heliothis species in Cotton and Other Host Plants, and from the Illinois Natural Hisltory Survey.
PY - 1974/7
Y1 - 1974/7
N2 - Esterases present in the hemolymph of last instar Heliothis zea (Boddie) were separated by Polyacrylamide gel electrophoresis. Four systems, all polymorphic, were observed. One system, Est-II, appeared especially suited for the study of some of the important population processes of this species; these include host-plant relations, migration, and the effects of environmental pressures such as pesticides on the species. Est-II was classified as a carboxylesterase, being sensitive only to organophosphate inhibitors. Dichlorvos at 10–5 M completely inhibited Est-II activity. Populations collected from corn from Tifton, Ga., and in two locations in Illinois, at approximately the same time were very similar genetically when compared on the basis of Est-II allele frequencies. A population collected from leguminous hosts in Tifton, Ga., at the same time as the above three populations was different genetically. Est-IIc, an allele normally rare or absent in the populations studied, was present at a high frequency in one Urbana population collection. Est-11c may be useful in studying the long-range dispersal of H. zea.
AB - Esterases present in the hemolymph of last instar Heliothis zea (Boddie) were separated by Polyacrylamide gel electrophoresis. Four systems, all polymorphic, were observed. One system, Est-II, appeared especially suited for the study of some of the important population processes of this species; these include host-plant relations, migration, and the effects of environmental pressures such as pesticides on the species. Est-II was classified as a carboxylesterase, being sensitive only to organophosphate inhibitors. Dichlorvos at 10–5 M completely inhibited Est-II activity. Populations collected from corn from Tifton, Ga., and in two locations in Illinois, at approximately the same time were very similar genetically when compared on the basis of Est-II allele frequencies. A population collected from leguminous hosts in Tifton, Ga., at the same time as the above three populations was different genetically. Est-IIc, an allele normally rare or absent in the populations studied, was present at a high frequency in one Urbana population collection. Est-11c may be useful in studying the long-range dispersal of H. zea.
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U2 - 10.4039/Ent106701-7
DO - 10.4039/Ent106701-7
M3 - Article
AN - SCOPUS:80054119539
SN - 0008-347X
VL - 106
SP - 701
EP - 709
JO - The Canadian Entomologist
JF - The Canadian Entomologist
IS - 7
ER -