Insect growth regulatory activity of Vitex trifolia and Vitex agnus-castus essential oils against Spilosoma obliqua.

Essential oils of Vitex trifolia and Vitex agnus-castus were evaluated against Vth instar larvae of Spilosoma obliqua, when applied topically on the dorsal side of mesothoracic region, for insect growth regulatory activity. This treatment caused extended larval period and pupal period, increase in larval mortality and adult deformity and decrease in adult emergence, fecundity of female and egg fertility of test insect.

Phytochemical composition of essential oil from seeds of Zingiber roseum Rosc. and its antispasmodic activity in rat duodenum.

A combination of GC and GC-MS revealed the presence of 60 compounds out of which 47 compounds (96.2% of the oil) were identified in the essential oil of seeds of Zingiber roseum Rosc., the major compounds being alpha-pinene, beta-pinene, limonene, p-cymene, alpha-terpineol and verticiole. The unique feature is the dominant presence of mono- and sesquiterpene hydrocarbons which make about 82% of the oil. The oil showed myorelaxant activity on isolated rat duodenal smooth muscle. The Zingiber roseum seed essential oil (ZRSEO) relaxed both cabachol- and KCl-induced contractile responses with IC(50) of non-significant difference. The results confirm a common mechanism in both the types of action of ZRSEO and suggests a probable inhibitory effect of ZRSEO on influx of Ca(2+) through cell membrane of rat duodenal smooth muscle.

Anthocyanin, bisabolol and phenylammonialyase activity in cell cultures of Populus deltoides.

Phenolics, anthocyanin and alpha-bisabolol production from poplar (Populus delotides) in tissue culture was determined. A number of phenolic acids were identified by HPLC. PAL activity in response to phytohormones, cells growth and anthocyanin production showed a positive correlation. A component, alpha-bisabolol, was identified using gas chromatography and UV spectroscopy. In vitro production of said metabolites was influenced by phytohormones.

The volatile constituents of Elsholtzia flava.

The volatile constituents of the essential oil from Elsholtzia flava Benth. growing in higher elevations of Kumaon region (India) were characterized by combination of GC, GC-MS, GC-FT-IR and NMR. Twenty-two components were identified comprising 93% of the oil. Rose furan (45.0%) and estragol (40.5%) were the major constituents.

Chemical Varieties of Essential Oils from Elsholtzia polystachya from Two Different Locations in India1.

Capillary GC, GC-MS, IR, GC-IR, (1)H- and (13)C-NMR studies of the essential oil from the leaves and cones of ELSHOLTZIA POLYSTACHYA collected from two different locations in India revealed that one oil contained 1,8-cineol (37.3%), the other one perillene (61.2%) as the main constituent.

Terpenoids from Elsholtzia Species; II1. Constituents of Essential Oil from a New Chemotype of Elsholtzia cristata.

Capillary GC, GC-MS, (1)H-, and (13)C-NMR spectroscopy revealed that the essential oil of ELSHOLTZIA CRISTATA Willd. growing in the Kumaun region contains 88% dehydroelsholtzia ketone along with some minor acylfuran derivatives. This species with respect to its oil composition is unlike that which grows in Japan and Kashmir, and contains elsholtzia ketone as the main constituent.

Constituents of Essential Oil of Elsholtzia strobilifera1.

The composition of the essential oil of ELSHOLTZIA STROBILIFERA, growing around Naini Tal (India) has been investigated by capillary gas-chromatography, gas-chromatography-mass spectrometry and (13)C-NMR spectroscopy. Out of about 50 identified mono- and sesquiterpenoids, pinocarvone is the most abundant component, which has not been identified in any species of ELSHOLTZIA before. The acylfuran derivatives reported from other species of ELSHOLTZIA could not be detected.