Environmental Entomology (1995) 24, 1224-1228

Laurence D. Charlet and Gary J. Brewer (1995)
Resistance of native sunflowers (Asterales: Asteraceae) to the banded sunflower moth (Lepidoptera: Cochylidae)
Environmental Entomology 24 (5), 1224-1228
Abstract: Six native sunflower, Helianthus, species were evaluated for resistance to the banded sunflower moth, Cochylis hospes Walsingham, a pest of cultivated sunflower in the northern Great Plains. Larval survival and oviposition preference by female C. hospes on the capitula (heads) of the native sunflowers H. annuus L., H. petiolaris Nuttall, H. maximiliani Schrader, H. tuberosus L., H. pauciflorus Nuttall ssp. subrhomboideus (Rydberg) Spring and Schilling, and H. nuttallii ssp. rydbergii (Britton) Long were evaluated in the field and laboratory, respectively. Larval development occurred on the capitula of all sunflower species tested.. Larval survival was higher on H. annuus than on any other species. The lowest larval survival, based on the percentage of capitula infested, occurred on H. maximiliani, H. pauciflorus, and H. tuberosus. More eggs were laid on the capitula of H. annuus than on other species in multiple-choice trials. In 2-choice tests, H. tuberosus received significantly fewer eggs than H. annuus. Both larval antibiosis and oviposition antixenosis resistance were evident in the perennial sunflower species H. pauciflorus, H. tuberosus, and H. maximiliani. Incorporating germplasm from these species into commercial hybrids could be helpful in reducing costs for the control of the banded sunflower moth.
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Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Cochylis hospes	Sunflower (Helianthus annuus)	U.S.A. (mid N)