A Laboratory Assay for Resistance to the Tobacco Hornworm in Lycopersicon and Solanum spp.1

Kennedy, George G.; Henderson, W. R.

doi:10.21273/jashs.103.3.334

Cited by 22 publications

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“…prejudiciais da linhagem P1134417 sobre o desenvolvimento dafase larval de insetos têm sido citados por diversos autores: Kennedy & Henderson (1978) observaram redução na viabilidade e no peso de lagartas deM sexta; Juvik etal. (1982) 1 Médias seguidas de mesma letra nas colunas, não diferem significativaniente entre si, pelo teste de Tukey, ao nível de 5% de probabilidade.…”

Section: Duração (Dias)1unclassified

“…O peso de pupas, de machos criados na linhagem P1134417 foi significativamente inferior àquele obtido em "Santa Cruz Kada AG-3 731 O mesmo ocorreu quando a comparação foi feita entre as fêmeas dos dois tratamentos (Tabela 3). Kennedy & Henderson (1978), trabalhando com Aí. sexta e Farrar Jr. & Kennedy (1 987a), estudando!!.…”

Section: Duração (Dias)1unclassified

“…), Leptinotarsa decemlineaia (Say) e Spodoptera litioralis (Boisd.) (Kennedy & Henderson 1978, Juvik et ai. 1982, Kennedy & Sorenson 1985» Lin & Trumbie 1986, Farrar Jr. & Kennedy 1 987a, b, 1991, Ventura 1992.…”

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Efeito de duas espécies de tomateiro na biologia de Scrobipalpuloides absoluta (Meyrick)

Giustolin

Vendramim²

1994

An. Soc. Entomol. Bras.

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Effect ofTwo Tomato Plant Species on the Biology of Scrobipalpuloides absoluta (Meyrick)The wild tomato Lycopersicon hirsutum f. glabratum Muli is known to be resistant to several insect pests. The leafminer Scrobipalpuloides absoluta (Meyrick) development and reproduction was evaluated on leaves of a wild material (P1 134417) and of a commercial cultivar 'Santa Cruz Kada AG-373 of Lycopersicon esculentum Miii, in the laboratory. Feeding on P1134417 resuited in elongation of the larval and pupal stages, reduction of larval viabiiity, lower pupal weigt, and lower female fecundity, when compared to the commercial cultivar.

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Section: Duração (Dias)1unclassified

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Efeito de duas espécies de tomateiro na biologia de Scrobipalpuloides absoluta (Meyrick)

Giustolin

Vendramim²

1994

An. Soc. Entomol. Bras.

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“…The wild tomato Lycopersicon hirsutum f. glabratum C. H. Mull is highly resistant to the tobacco hornworm [Manduca sexta (L.)], an important insect pest of the commercial tomato L. esculentum Mill. (12). Young larvae that come into contact with f. glabratum foliage quickly die, often without feeding (12,15,16,28).…”

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“…(12). Young larvae that come into contact with f. glabratum foliage quickly die, often without feeding (12,15,16,28). Published work indicates that 2-tridecanone, a methyl ketone present in the exudate from the foliar, glandular trichomes, is principally, if not exclusively, responsible for the resistance (4,11,15,28).…”

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Genetic Analysis of 2-Tridecanone Concentration, Leaf Trichome Characteristics, and Tobacco Hornworm Resistance in Tomato

Fery

Kennedy

1987

J. Amer. Soc. Hort. Sci.

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Experiments were developed to study the mechanism and genetic nature of the tobacco hornworm [Manduca sexta (L.)] resistance factor in the wild tomato (Lycopersicon hirsutum f. glabratum C. H. Mull. L hirsutum f. glabratum PI 134417 was crossed with the susceptible tomato (L. esculentum Mill. cv. Walter) (cross A) and the susceptible L. hirsutum Humb. & Bonpl. PI 127826 (cross B). Excised leaflets from individual plants of the parental, F1, F2, and backcross populations of each cross were bioassayed for M. sexta resistance, assayed for 2-tridecanone concentration using gas chromatography, and evaluated for density of the type VI trichome. Additionally, plants in the cross A populations were scored for morphological traits of the type VI trichome. Results of genetic analyses suggest that M. sexta resistance is conditioned by at least three recessive genes; high 2-tridecanone concentration was found to be inherited in a similar manner. No associations were found between type VI trichome morphology and the variables 2-tridecanone, type VI trichrome density, and tobacco hornworm resistance. Polynomial regression analysis showed that there is a semilogarithmic relationship between 2-tridecanone concentration and resistance ratings. Multiple linear regression analysis indicated that 2-tridecanone is principally responsible for the high degree of M. sexta resistance exhibited by PI 134417. Type VI trichome density, however, did account for a significant, although small, amount of the total variation in resistance in several of the segregating populations. We conclude that the genetic system that conditions high 2-tridecanone concentration (i.e., at least three recessive genes) is the same genetic system responsible for the high level of M. sexta resistance exhibited by PI 134417.

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Behavioral response ofTrichogramma pretiosum riley andTelenomus sphingis (Ashmead) to trichome/methyl ketone mediated resistance in tomato

1991

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Effects of methyl ketone (2-tridecanone and 2-undecanone)/glandular trichome-based resistance to insects ofLycopersicon hirsutum f.glabratum C.H. Mull, PI 134417, on the behavioral responses ofTrichogramma pretiosum Riley andTelenomus sphingis (Ashmead) were observed in the laboratory. ForT. pretiosum, these effects included (1) longer time required by the wasps to cross a leaf disk (diam. 16.3 mm), (2) higher percentage of wasps initiating flight from disks before reaching the edge, and (3) entrapment of wasps in trichome exudates. In tomato genotypes with varying densities of type VI glandular trichomes (3.1-9.2/mm(2)) but with no methyl ketones in the trichome tips, no such adverse effects were observed. The time taken to cross a disk or initiate flight byT. sphingis, a larger wasp thanT. pretiosum, was not significantly affected on 16.3-mm leaf disks, although the percentage ofT. sphingis initiating flight was directly correlated with trichome density among lines with no ketones. When placed on whole leaflets of plant lines with or without methyl ketones,T. sphingis was entangled by trichome exudates. However, unlikeT. pretiosum, T. sphingis was eventually able to free itself from entanglement. Landing rates byT. sphingis on PI 134417 foliage contained in dialysis tubes were also reduced. Data indicate that suppression of egg parasitism byT. sphingis on resistant foliage is due to both repellent action of its foliar volatiles and reduced searching rates by the parasitoids. Results indicate that a significant portion of the reduction of egg parasitism byT. pretiosum andT. sphingis is attributable to the effects of 2-tridecanone and/or 2-undecanone present in the tips of type VI glandular trichomes on PI 134417 foliage, although the trichomes also adversely affect the wasps even in plant lines without ketones.

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A Laboratory Assay for Resistance to the Tobacco Hornworm in Lycopersicon and Solanum spp.1

Cited by 22 publications

References 0 publications

Efeito de duas espécies de tomateiro na biologia de Scrobipalpuloides absoluta (Meyrick)

Efeito de duas espécies de tomateiro na biologia de Scrobipalpuloides absoluta (Meyrick)

Genetic Analysis of 2-Tridecanone Concentration, Leaf Trichome Characteristics, and Tobacco Hornworm Resistance in Tomato

Behavioral response ofTrichogramma pretiosum riley andTelenomus sphingis (Ashmead) to trichome/methyl ketone mediated resistance in tomato

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