|General form of a blossoming adult Vitex agnus-castus|
Vitex agnus-castus, also called vitex, chaste tree (or chastetree), chasteberry, Abraham's balm, – leading to its name as chaste tree– but its effectiveness for such action remains unproven.lilac chastetree, or monk's pepper, is a native of the Mediterranean region. It is one of the few temperate-zone species of Vitex , which is on the whole a genus of tropical and sub-tropical flowering plants. Theophrastus mentioned the shrub several times, as agnos (άγνος) in Enquiry into Plants. It has been long believed to be an anaphrodisiac
Vitex is a cross-pollinating plant, but its self-pollination has been recorded.
Vitex, its name in Pliny the Elder, is derived from the Latin vieo, meaning to weave or to tie up, a reference to the use of Vitex agnus-castus in basketry.Its macaronic specific name repeats "chaste" in both Greek and Latin; the small tree was considered to be sacred to the virginal goddess Hestia/Vesta. The most common names are chaste tree, vitex, and monk's pepper.
Vitex agnus-castus is widely cultivated in warm temperate and subtropical regions for its delicate-textured aromatic foliage and butterfly-attracting mid-summer spikes of lavender flowers opening in late summer in cooler climates. 1–5 m (3–16 ft). It requires full sun though tolerating partial shade, along with well-drained soil. Under ideal conditions it is hardy to −23 °C (−9 °F) USDA Zone 6, and can be found as far north as the south shore of Long Island and Nantucket on the East Coast of North America and in the mild southwest of England. In colder zones, the plant tends to die back to the ground, but as it flowers on new wood, flowering is not affected on vigorous growth in the following season. This plant is a brackish water dweller, indicating that it tolerates salt. Cold and wet weather results in dieback and losses. The plant grows well on loamy neutral to alkaline soil.It grows to a height of
In cultivation in the UK, the form Vitex agnus-castus f. latifolia has gained the Royal Horticultural Society’s Award of Garden Merit.
The monk's pepper fruits from one single tree can be harvested for more than 15 years. This indicates that the monk's pepper cannot be integrated in a usual crop rotation system. 180 cm (71 in), the overall best yield per hectare can be achieved if the plant spacing is around 70 cm (28 in). Pruning back the branches in autumn has a positive influence on fruit yield while a re-pruning in spring can induce an increase of vegetative shoot and thus to fruit yield loss.It is suggested to sow dissimilar plants such as monocots as its subsequent crop so that it might be easier to control the monk's pepper plant, the dicot. Because the fruits of monk's pepper tend to fall constantly and uncontrollably, it is likely that the plant can germinate from seed. It is said that at a row spacing of
This plant can also be reproduced vegetatively. One possibility is to use 5–8 cm (2–3 in) long piece of the ripening wood with buds in July or August and another is to cut the ripe wood in November and then let it root in a coldframe. Also in vitro reproduction with spike of the shoots or node explants is possible.
The flowering and ripening processes do not happen simultaneously, enabling harvesting of both fresh fruits and seeds over a long span of time. The fruits tend to fall from the plant as they ripen, getting lost in the soil. Thus, there is no optimal fixed harvest time. Consequently, to avoid yield loss, unripe fruits need to be harvested. This early harvesting has no effect on quality.Overall it is said that harvesting the fruits by hand is the most convenient solution.
Thysanoptera, also known as thrips, can cause great damage to the growth and the generative development of Vitex agnus-castus.The insect feeds on chaste tree by sucking up the contents or puncturing them. Also Chaste tree is the only known host (especially in Israel) for Hyalesthus obsoletus . This cicada is the vector for black wood disease of grapevines. Hyalesthus obsoletus prefers V. agnus-castus as a host to the grapevine. In this case chaste tree can be used as a biological control agent by planting it around vineyards to trap the Hyalesthus obsoletus. V. agnus-castus was found not only to be an appropriate food source for the adult vectors, but also a reservoir of Candidatus Phytoplasma solani (bacterial Phytoplasma species), the causal agent of the Black wood disease in grapevines. The pathogen-caused leaf spot disease can almost defoliate V. agnus castus. Furthermore, root rot can occur when soils are kept too moist.
Flavonoids (vitexin, casticin), iridoid glycoside (agnuside, aucubin), p-hydroxybenzoic acid,alkaloids, essential oils, fatty oils, diterpenoids and steroids have been identified in the chemical analysis of Vitex agnus-castus. They occur in the fruits and in the leaves.
Essential oils have been found in the fruits and in the leaves. The oil of leaves, unripe and ripe fruits differ in compounds. 50 compounds were identified in the oil of unripe fruits, 51 compounds in the oil of ripe fruits and 46 compounds in the oil of the leaves. 1,8-cineole and sabinene are the main monoterpene components and beta-caryophyllene is the major sesquiterpene compound found in the fruits of Vitex agnus-castus. There are some slight differences between fruits from white flowering plants and such from violet flowering ones. The oil of fruits of white flowering plants have a higher amount of monoterpene constituents. The leaves mainly contain 1,8-cineole, trans-beta-farnesene, alpha-pinene, trans-beta-caryophyllene, and terpinen-4-ol. The oil, particularly from white flowering plants, is under preliminary research for its potential antibacterial effects.
The leaves and tender stem growth of the upper 10 cm (3.9 in), along with the flowers and ripening seeds, are harvested for alternative medicinal purposes. It is believed the berries are a tonic herb for both the male and female reproductive systems. The leaves are believed to have the same effect, but to a lesser degree. The leaves, flowers, and/or berries may be consumed as a decoction, traditional tincture, cider vinegar tincture, syrup, elixir, or simply eaten from the plant with presumed benefits as food. A popular way of taking Vitex is on awakening as a simple 1:1 fluid extract, which is said to interact with hormonal circadian rhythms most effectively.
In ancient times, it was believed to be an anaphrodisiac, hence the name chaste tree. Pliny, in his Historia Naturalis , reported the use of stems and leaves of this plant by women as bedding "to cool the heat of lust" during the time of the Thesmophoria, when Athenian women left their husbands to remain ritually chaste. At the end of the 14th century, John Trevisa reported of it "the herbe agnus-castus is always grene, and the flowre therof is namly callyd Agnus Castus, for wyth smel and vse it maketh men chaste as a lombe".In the 15th-century poem The Flower and the Leaf , it is referred to as an attribute of the chaste Diana, and in the 16th century the English herbalist William Turner reported the same anaphrodisiac properties of the seed, both fried and not fried.
Despite numerous studies, there is limited clinical evidence for the effectiveness of vitex plant extracts to manage premenstrual stress syndrome, including premenstrual dysphoric disorder and latent hyperprolactinaemia.Although the medication is recommended in Germany, there are further indications that Vitex agnus-castus should be avoided during pregnancy due to the possibility of complications.
The most frequent adverse effects from vitex use include nausea, headache, gastrointestinal discomfort, menstrual discomfort, fatigue, and skin disorders.People taking dopamine-related medications or Parkinson's disease medications should avoid using chasteberry. Women on birth control pills, hormone replacement therapy, or having a hormone-sensitive condition, such as breast cancer, are advised not to use chasteberry. Use of vitex is discouraged for pregnant or breastfeeding women, and for children.
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