Synthetic methyl- and dimethylalkanes : Kovats Indices, [(13)C]NMR and mass spectra of some methylpentacosanes and 2,X-dimethylheptacosanes.

abstract：:A new blend of volatiles was identified for the fruit of downy red hawthorn, Crataegus mollis, that is attractive to Rhagoletis pomonella flies infesting this host in the northeastern USA. The new blend was as attractive as the previously identified mixture but is more complex in the number of odorants (six in the old...

journal_title：Journal of chemical ecology

authors： Cha DH,Powell THQ,Feder JL,Linn CE Jr

更新日期：2018-08-01 00:00:00

abstract：:Plants synthesize a wide range of bioactive secondary metabolites to defend against pests and pathogens. Red alder (Alnus rubra) bark, root, and leaf extract have a long history of use in traditional medicine and hygiene. Diarylheptanoids, especially oregonin ((5S)-1,7-bis(3,4-dihydroxyphenyl)-5-(β-D-xylopyranosyloxy)...

journal_title：Journal of chemical ecology

authors： Lea CS,Bradbury SG,Constabel CP

更新日期：2021-01-21 00:00:00

abstract：:The feasibility of using the synthetic sex pheromone, disparlure, as a mating confusant of the nun moth (Lymantria monacha L.) was investigated on wild populations occurring in outbreak proportions in Poland and in low density in Czechoslovakia. The size of experimental plots ranged from 1 to 12 hectares. The amounts ...

journal_title：Journal of chemical ecology

authors： Zďárek J,Vrkoč J,Hochmut R,Kolk A

更新日期：1988-02-01 00:00:00

abstract：:The effect of brief pheromone exposures on responses of codling moth (Cydia pomonella L.) males was tested by flight-tunnel and electroantennogram (EAG) studies. Males were preexposed to pheromone for up to 3 min as they sat in release cages or for shorter times (a few seconds to several min) upon initiating flights o...

journal_title：Journal of chemical ecology

authors： Stelinski LL,Gut LJ,Miller JR

更新日期：2006-07-01 00:00:00

abstract：:Female smaller tea tortrix mothsAdoxophyes sp. (Lepidoptera: Tortricidae), which initiated calling at 1, 2, or 3 days old, respectively, were analyzed individually for (Z)-11-tetradecenyl acetate (Z11-14:OAc) and (Z)-9-tetradecenyl acetate (Z9-14: OAc) in the pheromone gland via GLC. Among different age groups, broad ...

journal_title：Journal of chemical ecology

authors： Kou R,Chow YS

更新日期：1991-09-01 00:00:00

abstract：:Steroidal glycoalkaloids, found in species of the Solanaceae, elicit bursting activity in galeal and tarsal chemosensilla of adult Colorado potato beetles. The effect has an average latency of 6-12 sec, depending on the sensillum/alkaloid combination. A 20-sec alkaloid treatment is often suffficient to render galeal s...

journal_title：Journal of chemical ecology

authors： Mitchell BK,Harrison GD

更新日期：1985-01-01 00:00:00

abstract：:Chemical mimicry is an effective strategy when signal receivers recognize and discriminate models by relying on chemical cues. Some aphid enemies mimic the cuticular chemicals of aphids through various means thus avoiding detection and attack by aphid-tending ants. However, because ants have been reported to learn the...

journal_title：Journal of chemical ecology

authors： Hayashi M,Nomura M,Nakamuta K

更新日期：2016-03-01 00:00:00

abstract：:Root exudates of 100 cultivars ofSorghum bicolor L. (Moench) were screened for their ability to inhibit seed germination and seedling growth ofAmaranthus retroflexus L. Exudates of some of the test cultivars were found to inhibit significantly seed germination and/or seedling growth ofA. retroflexus, and most of the i...

journal_title：Journal of chemical ecology

authors： Alsaadawi IS,Al-Uqaili JK,Alrubeaa AJ,Al-Hadithy SM

更新日期：1986-01-01 00:00:00

abstract：:The antiherbivore potential of the glucosinolate-myrosinase defense system found in plants of the order Capparales is heavily influenced by the types of hydrolysis products (e.g. isothiocyanates, nitriles) formed from the parent glucosinolates upon plant damage. However, comparison of the effects of glucosinolate hydr...

journal_title：Journal of chemical ecology

authors： Burow M,Müller R,Gershenzon J,Wittstock U

更新日期：2006-11-01 00:00:00

abstract：:In 2002-2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (-)-alpha-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North ...

journal_title：Journal of chemical ecology

authors： Miller DR,Rabaglia RJ

更新日期：2009-04-01 00:00:00

abstract：:Phlorotannins are ubiquitous secondary metabolites in brown algae that are phenotypically plastic and suggested to have multiple ecological roles. Traditionally, phlorotannins have been quantified as total soluble phlorotannins. Here, we modify a quantification procedure to measure, for the first time, the amount of c...

journal_title：Journal of chemical ecology

authors： Koivikko R,Loponen J,Honkanen T,Jormalainen V

更新日期：2005-01-01 00:00:00

abstract：:Jasmonic acid (JA) is a key molecule initiating plant defensive responses to herbivory. Our previous work has shown that this phytohormone is often present at high concentrations in eggs and neonates of lepidopteran species. In this work, we document the concentrations of JA found in various tissues of larval H. vires...

journal_title：Journal of chemical ecology

authors： Tooker JF,De Moraes CM

更新日期：2006-10-01 00:00:00

abstract：:The vast spectrum of inducible plant defenses can have direct negative effects on herbivores, or indirect effects, for instance in the form of herbivore-induced plant volatiles (HIPVs) that attract natural enemies. Various arthropods have evolved ways to suppress plant defenses. To test whether this is the case for ca...

journal_title：Journal of chemical ecology

authors： De Lange ES,Laplanche D,Guo H,Xu W,Vlimant M,Erb M,Ton J,Turlings TCJ

更新日期：2020-03-01 00:00:00

abstract：:Entomophagous insects are often repelled by the secondary compounds of the plants eaten by their prey. These compounds, therefore, take on a defensive role for the phytophagous species that sequester them. Given that numerous entomophagous species are capable of learning, the effects on the foraging behavior of a repe...

journal_title：Journal of chemical ecology

authors： Le Roux AM,Le Roux G,Thibout E

更新日期：2002-11-01 00:00:00

abstract：:Lizards communicate with others via chemical signals, the composition of which may vary among species. Although the selective pressures and constraints affecting chemical signal diversity at the species level remain poorly understood, the possible role of diet has been largely neglected. The chemical signals of many l...

journal_title：Journal of chemical ecology

authors： Baeckens S,García-Roa R,Martín J,Van Damme R

更新日期：2017-09-01 00:00:00

abstract：:Tannic acid and pin oak tannins precipitate large amounts of the abundant leaf protein, ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPC), over a wide pH range (6.15-9.30) in the presence of sodium, potassium, magnesium, and calcium ions at concentrations comparable to those reported in the gut fluids of lepidop...

journal_title：Journal of chemical ecology

authors： Martin MM,Rockholm DC,Martin JS

更新日期：1985-04-01 00:00:00

abstract：:The buffy-headed marmoset (Callithrix flaviceps) is apparently the only predispersal herbivore of the seeds of Siparuna guianensis at the Caratinga Biological Station in southeastern Brazil. Both the fruit receptacles and the frutioles (seeds) of S. guianensis are relatively rich in nutrients such as carbohydrates, pr...

journal_title：Journal of chemical ecology

authors： Simas NK,Ferrari SF,Pereira SN,Leitão GG

更新日期：2001-01-01 00:00:00

abstract：:Glutathione transferase activity towards various plant isothiocyanates was studied in larvae of the two generalists, fall armyworm [Spodoptera frugiperda (J.E. Smith)], and cabbage looper [Trichoplusia ni (Hübner)], and the specialist, velvetbean caterpillar (Anticarsia gemmatalis Hübner) using the midgut soluble frac...

journal_title：Journal of chemical ecology

authors： Wadleigh RW,Yu SJ

更新日期：1988-04-01 00:00:00

abstract：:The effects of coumarin on the length, diameter, and branching density of different root types in maize seedlings (Zea mays L. cv. Cecilia) were investigated. The maize root system represents a useful model for morphological studies, as it consists of radicle, seminal, and nodal roots whose origin and development are ...

journal_title：Journal of chemical ecology

authors： Abenavoli MR,Sorgonà A,Albano S,Cacco G

更新日期：2004-09-01 00:00:00

abstract：:A bicyclic sesquiterpene dialdehyde, polygodial did not inhibit root elongation up to a concentration of 12.5 microg/ml in a lettuce seedling assay: trans-Cinnamic acid inhibited the elongation by 50% at 1.2 microg/ml (8.1 microM). The inhibitory activity of trans-cinnamic acid was enhanced 17-fold when used in combin...

journal_title：Journal of chemical ecology

authors： Fujita K,Kubo I

更新日期：2003-10-01 00:00:00

abstract：:The potent phytotoxic trichothecene roridins and baccharinoids occur naturally in the Brazilian plants,Baccharis coridifolia andB. megapotamica. Biosynthesis of roridins inB. coridifolia appears to be linked to pollination, and the phytotoxins then accumulate in the seed. The roles of the phytotoxins in pollination, s...

journal_title：Journal of chemical ecology

authors： Kuti JO,Jarvis BB,Mokhtari-Rejali N,Bean GA

更新日期：1990-12-01 00:00:00

abstract：:Responses of threeHylastes species,Dryocoetes autographus, and twoHylobius species to terpenes and ethanol were studied in field experiments on clear-cut forest sites in Sweden using baited ground traps.α-Pinene alone did not attract any of the six species. A terpene blend (spruce turpentine consisting mainly ofα-pine...

journal_title：Journal of chemical ecology

authors： Lindelöw A,Eidmann HH,Nordenhem H

更新日期：1993-07-01 00:00:00

abstract：:Phenolic acids and related compounds were separated by gas chromatography using three separate columns. One of these columns was coupled to a Fourier transform infrared spectrometer. The trimethylsilyl derivatives could be separated and identified by comparing the relative retention times of the three different column...

journal_title：Journal of chemical ecology

authors： Melhuish JH Jr,Willis RB,Wright CS

更新日期：1987-02-01 00:00:00

abstract：:Leaves of Chrysanthemum morifolium cv. Ramat were extracted sequentially with hexane, ethyl acetate, and methanol. The methanol fraction, when incorporated into artificial diet was found to reduce the growth of cabbage looper (Trichoplusia ni Hubner) larvae at concentrations between 500 and 5000 ppm of diet. Fractiona...

journal_title：Journal of chemical ecology

authors： Beninger CW,Abou-Zaid MM,Kistner AL,Hallett RH,Iqbal MJ,Grodzinski B,Hall JC

更新日期：2004-03-01 00:00:00

abstract：:Epinotia aporema (Walsingham) is a Neotropical pest of legumes in southern South America. Its importance has increased during the last decade owing to the significant growth of soybean production in the region. Monitoring of E. aporema is difficult due to the cryptic behavior of the larvae, and hence, chemical control...

journal_title：Journal of chemical ecology

authors： Altesor P,Rossini C,Zarbin PH,González A

更新日期：2009-03-01 00:00:00

abstract：:The response of the sawtoothed grain beetle,Oryzaephilus surinamensis (L.), and the merchant grain beetle,O. mercator (Fauvel), to synthetic racemic and chiral macrolide aggregation pheromones was assessed in pitfall olfactometers.O.mercator utilizes theR enantiomers of (Z)-3-dodecen-11-olide and (Z,Z)-3,6-dodecadien-...

journal_title：Journal of chemical ecology

authors： Pierce AM,Pierce HD Jr,Oehlschlager AC,Czyzewska E,Borden JH

更新日期：1987-06-01 00:00:00

abstract：:Bioassays with a variety of overripe fruits, including mango, plum, pear, and grape, and their extracts showed that odors from overripe mango were most attractive to adult vinegar flies, Drosophila melanogaster. Combined gas chromatography-electroantennographic detection (GC-EAD) analyses of solid-phase microextractio...

journal_title：Journal of chemical ecology

authors： Zhu J,Park KC,Baker TC

更新日期：2003-04-01 00:00:00

abstract：:Hexane extracts of leaves of 307 accessions from 73 host plant species ofHelicoverpa zea were analyzed by gas chromatography (GC) and used forH. zea oviposition and neonate larvae orientation bioassays. The gas chromatographic (GC) retention times of compounds statistically associated with behavioral activity were ide...

journal_title：Journal of chemical ecology

authors： Breeden DC,Young TE,Coates RM,Juvik JA

更新日期：1996-03-01 00:00:00

abstract：:Synthetic pheromone was released from a dispenser stretched across the width of a wind tunnel. Beetles in pheromone-free wind wandered in all directions and did not appear to orient to the wind. A dosage series showed that pheromone decreased the walking rate and deviations from the upwind direction, and it increased ...

journal_title：Journal of chemical ecology

authors： Patrick Akers R,Wood DL

更新日期：1989-04-01 00:00:00

abstract：:The effect of volatiles of diethyl ether-extracted dominant male mouse lemur urine on conspeciflc testosterone plasma concentrations was determined in an apparatus permitting olfactory isolation of the experimental subjects. Two experimental groups were exposed to air odorized with either ether or aqueous extracts of ...

journal_title：Journal of chemical ecology

authors： Perret M,Schilling A

更新日期：1987-03-01 00:00:00