Laurence D Charlet
Affiliation: Agricultural Research Service
- Impact of combining planting date and chemical control to reduce larval densities of stem-infesting pests of sunflower in the central plainsLaurence D Charlet
USDA ARS Northern Crop Science Laboratory, Fargo, ND 58105 5677, USA
J Econ Entomol 100:1248-57. 2007..Chemical control and planting date were compatible with natural mortality contributed by C. adspersus larval parasitoids...
- Resistance among cultivated sunflower germplasm to stem-infesting pests in the central Great PlainsLaurence D Charlet
USDA ARS, Northern Crop Science Laboratory, 1307 18th St North, Box 5677, Fargo, ND 58105, USA
J Econ Entomol 102:1281-90. 2009..The prospect of adding host plant resistance as an integrated pest management (IPM) tactic would provide another tool for reducing economic losses from stem-infesting insect pests of sunflower in the central Great Plains...
- Impact of irrigation on larval density of stem-infesting pests of cultivated sunflower in KansasLaurence D Charlet
Northern Crop Science Laboratory, Agricultural Research Service, US Department of Agriculture, Fargo, North Dakota 58105 5677, USA
J Econ Entomol 100:1555-9. 2007..Results showed that ensuring adequate moisture during the growing season can assist in reducing stem-infesting insect densities, revealing an additional advantage of crop irrigation beyond improved sunflower productivity...
- Impact of planting date on sunflower beetle (Coleoptera: Chrysomelidae) infestation, damage, and parasitism in cultivated sunflowerLaurence D Charlet
Northern Crop Science Laboratory, Agricultural Research Service, U S Department of Agriculture, Fargo, ND 58105 5677, USA
J Econ Entomol 96:706-13. 2003..In addition, altering planting dates was compatible with biological control of the beetle, because delaying the planting date did not reduce the effectiveness of the parasitic fly, M. macellus, which attacks the sunflower beetle larvae...
- Isolation of three diterpenoid acids from sunflowers, as oviposition stimulants for the banded sunflower moth, Cochylis hospesBruce D Morris
Department of Entomology, North Dakota State University, Fargo, 58105, USA
J Chem Ecol 35:50-7. 2009..In laboratory bioassays, purified natural samples of each of these compounds stimulated oviposition by female BSFM. Structure-activity relationships of the five diterpenoids known to stimulate oviposition by female BSFM are discussed...
- Impact of planting dates on a seed maggot, Neotephritis finalis (Diptera: Tephritidae), and sunflower bud moth (Lepidoptera: Tortricidae) damage in cultivated sunflowerJanet J Knodel
Department of Entomology, Hultz Hall, North Dakota State University, Fargo, ND 58102, USA
J Econ Entomol 104:1236-44. 2011..Results of this study showed that delayed planting is an effective integrated pest management strategy that can reduce head damage caused by N. finalis and S. helianthana and mitigate yield losses...
- Ovipositional preference and larval performance of the banded sunflower moth (Lepidoptera: Tortricidae) and its larval parasitoids on resistant and susceptible lines of sunflower (Asterales: Asteraceae)Anitha Chirumamilla
Department of Entomology, North Dakota State University, Hultz Hall, Fargo, ND 58108, USA
Environ Entomol 43:58-68. 2014..A positive association between resistance to larval feeding and parasitism was found in years 2006 and 2008, with resistant accessions having significantly greater proportions of parasitized larvae than did the susceptible Par 1673-2. ..
- Isolation of the diterpenoids, ent-kauran-16alpha-ol and ent-atisan-16alpha-ol, from sunflowers, as oviposition stimulants for the banded sunflower moth, Cochylis hospesBruce D Morris
Department of Entomology, North Dakota State University, Fargo, North Dakota 58105, USA
J Chem Ecol 31:89-102. 2005..A factorial design bioassay, using compounds 1 and 2, showed that 1 was relatively more stimulatory than 2, and that there was no synergistic effect on oviposition when the two compounds were combined...
- Cuticular hydrocarbons of the sunflower beetle, Zygogramma exclamationisDennis R Nelson
Biosciences Research Laboratory, Agricultural Research Service, US Department of Agriculture, 1605 Albrecht Boulevard, Fargo, ND 58105, USA
Comp Biochem Physiol B Biochem Mol Biol 135:273-84. 2003....