Larvicidal factors contributing to host-plant resistance against sunflower moth

Waiss, Anthony C.; Chan, Bock G.; Elliger, Carl A.; Garrett, V. H.; Carlson, E; Beard, Benjamin H.

doi:10.1007/bf00446795

Cited by 15 publications

(7 citation statements)

References 2 publications

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“…We wish to report that the stems of Helianthus annuus collected in Douglas County, Kansas, in the fall of 1979-1981 were subjected to bioassay-directed fractionation (7) and gave small quantities of trachyloban-19-oic (8,9) and (-)-kaur-16-en-19-oic (9,10) acids as active antimicrobial constituents. Interestingly, the same two acids have recently been shown to be responsible for resistance of some strains of sunflower to the sunflower moth (Homoeosoma electellum) (11). (-)-Kaur-16-en-19-oic acid has also been isolated as an antimicrobial agent from Croton argyrophylloides (16) and Minania monagasensis (17).…”

Section: Isolation and Identification Of Trachyloban-19-oic Andmentioning

confidence: 99%

Isolation and Identification of Trachyloban-19-Oic and (-)-Kaur-16-en-19-Oic Acids as Antimicrobial Agents from the Prairie Sunflower, Helianthus annuus

Mitscher¹,

Rao²,

Veysoglu³

et al. 1983

J. Nat. Prod.

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Section: Isolation and Identification Of Trachyloban-19-oic Andmentioning

confidence: 99%

Isolation and Identification of Trachyloban-19-Oic and (-)-Kaur-16-en-19-Oic Acids as Antimicrobial Agents from the Prairie Sunflower, Helianthus annuus

Mitscher¹,

Rao²,

Veysoglu³

et al. 1983

J. Nat. Prod.

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“…Two diterpenoid acids, 16-kauren-19-oic acid and trachyloban-19-oic acid, were isolated from florets of H. annuus (Pyrek, 1970) and inhibited the growth of the sunflower moth [Homeosoma electellum (Hulst)] (Waiss et al, 1977). These and several other diterpenoid acids also inhibited the growth of Heliothis uirescens (Fab.…”

mentioning

confidence: 99%

Diterpenoid acids, (-)-cis- and (-)-trans-ozic acid, in wild sunflower, Helianthus occidentalis

Stipanovic¹,

O'Brien²,

Rogers³

et al. 1979

J. Agric. Food Chem.

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“…1b) than in the other accessions for ßorets (except PI 291403, for which the concentration was similar) but not for bracts (except for PI 494859, which had a lower concentration). With regard to the known toxic diterpenoid acids (Waiss et al 1977), trachylobanoic acid was in greater concentration in bracts of PI 170385 than in bracts of Par 1673-2 and PI 497939, whereas kaurenoic acid was in greater concentration in ßorets of Par 1673-2, PI 170385, and PI 291403 than in ßorets of PI 494859 ( Fig. 1c and d).…”

Section: Diterpenoid Concentrations In Bracts and Floretsmentioning

confidence: 80%

“…These diterpenoid acids had been demonstrated previously to be toxic to sunßower moth, H. electellum, when incorporated into artiÞcial diet at concentrations in which they are found in sunßowers (Waiss et al 1977, Rogers et al 1987). While we found no relationship between concentrations of these acids in bracts and the number of eggs laid in the heads, we found positive correlations between the number of banded sunßower moth larvae feeding per sunßower head as well as the likelihood of damage to a seed and concentration of kaurenoic acid, the most abundant diterpenoid we found in sunßower head tissue.…”

Section: Discussionmentioning

confidence: 95%

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)

et al. 2014

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Banded sunflower moth, Cochylis hospes Walsingham, is one of the most destructive seed-feeding insect pests of sunflowers, causing significant economic yield losses in the northern Great Plains. In an attempt to understand host-plant resistance mechanisms for this pest, we field-tested, over several years, the effects of seven sunflower accessions, rated as resistant to C. hospes in previous screening trials, and a susceptible control (Par 1673-2), on the ovipositional preference and larval performance of C. hospes and its larval parasitoids. Of the resistant accessions, PI 494859 was the most preferred for oviposition, receiving a significantly greater number of eggs per head than did the susceptible Par 1673-2 in 2 of 3 yr. However, the numbers of larvae, and consequently the rate of seed infestation, found in PI 494859 heads were significantly lower than those in Par 1673-2 heads over all 3 yr. Female moths laid relatively few eggs on accessions PI 170385, 291403, and 251902, compared with on Par 1673-2, resulting in lower numbers of larvae per head and lower percentages of seed damaged. No association was observed between the concentrations of two diterpenoid alcohols or two diterpenoid acids in sunflower bracts and the numbers of eggs laid on the heads of the accessions. The number of banded sunflower moth larvae and the proportion of seeds damaged were positively correlated with kaurenoic acid concentrations and negatively correlated with kauranol concentrations. 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.

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Larvicidal factors contributing to host-plant resistance against sunflower moth

Cited by 15 publications

References 2 publications

Isolation and Identification of Trachyloban-19-Oic and (-)-Kaur-16-en-19-Oic Acids as Antimicrobial Agents from the Prairie Sunflower, Helianthus annuus

Isolation and Identification of Trachyloban-19-Oic and (-)-Kaur-16-en-19-Oic Acids as Antimicrobial Agents from the Prairie Sunflower, Helianthus annuus

Diterpenoid acids, (-)-cis- and (-)-trans-ozic acid, in wild sunflower, Helianthus occidentalis

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)

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