Isolation of Three Diterpenoid Acids from Sunflowers,as Oviposition Stimulants for the Banded Sunflower Moth, <Emphasis Type="Italic">Cochylis hospes</Emphasis> |
| |
| Authors: | Bruce D Morris Laurence D Charlet Stephen P Foster |
| |
| Affiliation: | (1) Department of Entomology, North Dakota State University, P.O. Box 5346, Fargo, ND 58105, USA;(2) United States Department of Agriculture-Agricultural Research Service, Northern Crop Science Laboratory, P.O. Box 5677, Fargo, ND 58105, USA;(3) Present address: RJ Hill Laboratories, Private Bag 3205, Hamilton East, New Zealand |
| |
| Abstract: | The banded sunflower moth (BSFM), Cochylis hospes Walshingham (Lepidoptera: Cochylidae) is a specialist insect, the larvae of which feed on sunflowers, Helianthus spp., and a few other species of Compositae. It is one of the most important pests of sunflower in the USA. Previous work
on H. annuus, the cultivated sunflower, revealed two diterpenoids that function as oviposition stimulants for female BSFM, and that other,
more polar compounds also stimulated oviposition. Using a bioassay-guided approach, we isolated three additional diterpenoids,
grandifloric acid (1), 15β-hydroxy-ent-trachyloban-19-oic acid (2), and 17-hydroxy-16α-ent-kauran-19-oic acid (3), from polar fractions of pre-bloom sunflower head extracts. 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. |
| |
| Keywords: | Grandifloric acid 15β -hydroxy-ent-trachyloban-19-oic acid 17-hydroxy-16α -ent-kauran-19-oic acid Lepidoptera Cochylidae Helianthus annuus |
| 本文献已被 SpringerLink 等数据库收录！ |
|
