Ageratum conyzoides:  A Multi-Purpose Plant with Therapeutic Promise

 

Anilkumar Aher, Sonali Gawali, Vaishnavi Kamble*, Pranjal Jadhav, Chetan Darade,

Suraj Kharat, Harshada Tamkhane

Department of Pharmacognosy, MVPs College of Pharmacy, Nashik 422002, Maharashtra, India.

*Corresponding Author E-mail: vaishnavikamble1304@gmail.com

 

ABSTRACT:

The ancient Indian practice of medicine - Ayurveda, outlines an array of herbs, fats, oils, and minerals that possess Anti-aging, Wound healing, Anti-inflammatory, Antifungal, and antimicrobial properties. In Ageratum conyzoides various phytochemical presents like Alkaloide, Glycoside, Coumarin And various Phenolic compounds. Injuries to the skin that compromise the soft tissue led to wounds. Wound healing can be characterized as a Complicated and vigorous process that results in the restoration of anatomical continuity and function. Over the years, various plant products utilized for the treatment of wounds, fungal, and microbial infections. Herbal extracts facilitate blood clotting, combat infection, and speed up the process of wound healing. Therefore, in this current review, a compilation of plants utilized in traditional medicine for wound treatment was examined. This work is advantageous for researchers, offering extensive information regarding Ageratum conyzoides Linn. and the creation of safe, effective, and globally recognized herbal medicines for treating fungal infections.

 

KEYWORDS: Ageratum conyzoides, Eugenol, Anthelmintic, Cromenes, Precocene.

 

 


INTRODUCTION:

Ageratum conyzoides Linn. (Asteraceae) is often referred to as Appa grass and goat weed in English, Pumpillu in Tamil, and Visadodi in Hindi. This is a polymorphic, aromatic, annual herb that is indigenous to tropical America1,2. Ageratum conyzoides has naturalized as a weed in India, including the middle Andaman. The genus name "Ageratum" is derived from the Greek words "a geras," meaning non-aging, likely referring to the plant's prolonged lifespan.

 

 

The species epithet "conyzoides" is linked to the Greek name for Inula helenium, suggesting a resemblance between the two plants3,4. The plant is recognizable by its pale green foliage and its flowers, pale blue or white, malodorous, and consist of 50 - 80 flowered corymbs. It blooms during October to November5. Ageratum derives from the Greek phrase ‘a geras,’ meaning non-aging, pertains to the longevity of the entire plant. A.Conyzoides, conversely, comes from ‘konyz’, the Greek term for Inula helenium, plant resembles6. Ageratum conyzoides is a member of the Asteraceae family and the Eupatoriae tribe. This family is distinctly characterized and cannot be mistaken for any other. Most of the plants in this family are herbaceous, whereas trees and shrubs are relatively uncommon. The genus Ageratum includes around 30 species, but only a handful of species have undergone phytochemical examination. The equatorial species Ageratum conyzoides is widely distributed throughout West Africa, as well as some parts of Asia and South America.It is an annual herb that branches and reaches around 1 m in height. The stems and leaves are coated with fine white hairs, while the leaves are oval-shaped and can grow up to 7. 5 cm in length. The flowers range from purple to white, measuring less than 6 mm in diameter and are clustered in close terminal inflorescences. The fruits are achenes and can be easily dispersed, with the seeds being photoblastic and often losing viability within 12            months 7. This plant frequently grows near human habitations, flourishes in various garden soils, and is very abundant in areas of waste and on derelict sites Ageratum conyzoides is known for its distinctive and potent odor, likened to the smell of a male goat in Australia, earning it colloquial names such as "goat weed" or "billy goat weed."Although this species' toxicity has not been fully studied, the essential oil that is extracted through steam distillation is said to have a very strong, sickening smell. The presence of Coumarin and HCN in the plant made it hazardous to rabbits. In some cultures, A. conyzoides is regarded as a delicacy for domestic guinea pigs, horses, and cattle, but humans do not eat it unless it is used medicinally 8.

 

Table No.1.Taxonomical classification

Kingdom

Plantae

Subkingdom

Angiosperm

Class

Eudicots

Order

Asterales

Family

Asteraceae

Genus

Ageratum

Species

conyzoides

Binomial name

Ageratum conyzoides Linn

 

Table No.2. Vernacular Names

Tamil

Pumpillu,

Sanskrit

Visamustih

English

Appa Grass.

Distribution

All over India

Plant Part Used

Whole Plant.

 

 

Fig. 01: Ageratum conyzoides

 

Plant profile:

Different components of this plant utilized in the traditional medical system to address a wide range of ailments including boils, Sores, Tetanus, Skin conditions, Fever, Chronic ulcers, Intra-uterine issues, Eye problems, rheumatism, asthma, stomach illnesses, and more 8 - 10. The plant's leaves are frequently used as an anthelmintic, Larvicidal, mosquito repellant, Insecticidal, Anti-inflammatory, Analgesic, Antipyretic, Antispasmodic, Gastroprotective, Antimicrobial, Anti-diabetic, Anticancer, Antiulcer, Antioxidant, Hematopoietic, and Wound healer. The stem is traditionally utilized as a wound healer, antioxidant, antitumor, antimicrobial, and anti-inflammatory9. Inflammatory, Antiulcer, Antidiabetic, Anticonvulsant, and antimicrobial properties. Its leaves contain Flavones and Chromene derivatives, while the stem has Isoflavone glycosides and Sterols. The whole plant includes Pyrrolizidine alkaloids, Terpenoids, and Polymethoxylated flavonoids. Various studies highlight its chemical constituents and biological activities, but further pharmacognostic research is needed. This study aims to assess macroscopic, microscopic, and physicochemical parameters. Skin disorders, a major global health issue, have significant psychological, social, and financial impacts10. Chronic skin disorders like psoriasis and eczema cause significant discomfort and reduced quality of life, while malignant melanoma has a high mortality rate. Various assessment tools help evaluate their impact. This review highlights existing studies on the burden of common skin disorders and suggests methods for measurement11 Ageratum conyzoides is commonly utilized in traditional medicine throughout Africa, Asia, and South America for the treatment of a wide range of diseases. It serves as a purgative, febrifuge, and remedy for ophthalmia, colic, ulcers, and wounds. The plant is known for its antineuralgic and antipyretic effects, while in Africa, it is used for mental, infectious diseases, headaches, and dyspnea. In Cameroon, it treats craw-craw, and its pulverized leaves are used as an emetic and for uterine issues12. They are used to treat pneumonia by applying them to the patient's chest. In addition to its widespread application for skin ailments and wound healing in Nigeria, a decoction of the plant is consumed internally to address diarrhea and to ease navel-related pain in children. In central Africa, the plant is utilized to specifically treat wounds resulting from burns. Meanwhile, in Kenya, East Africa, it is employed in traditional medicine for its Antiasthmatic, Antispasmodic, and Hemostatic properties. In India, it is applied in the management of leprosy and as an oil lotion for purulent ophthalmia13. In Brazilian folk medicine, A. conyzoides is used in medicinal teas for its Anti-inflammatory, Analgesic, and Antidiarrheal effects, while in Vietnam, it is valued for treating gynecological conditions. Traditionally, it also serves as a remedy for Rheumatism, Tooth pain, Sleeping sickness, and as an Anti-itch treatment. Additionally, it is used for Trachoma prevention in cattle and has documented nematocidal properties. The plant is also linked to cultural beliefs, offering protection from snake bites in Ivory Coast, aiding incantations in Nigeria, and enhancing luck for card players in Congo14. If the sap is applied to the accused in a trial and then pricked with a needle, the sensation of pain will only be experienced if guilty. The entire plant produces volatile oil with a potent fragrance. Several biological effects have been linked to this oil.

 

Phytochemistry:

A substantial part of the research on photochemistry focuses on the essential oil of this plant. The oil content varies irregularly with the seasons, ranging from 0.11% to 0.58% in the leaves and from 0.03% to 0.18% in the roots. Through the water distillation of the fresh flowers, the oil concentration was determined to be 0. 2%. The oil yield from the Petroleum ether extraction of the seeds was 26%. Mono and Sesquiterpenes: A significant number of components have been discovered through the GC-MS analysis of the essential oil of A. conyzoides. The highest number to date, 51 components have been documented from the examination of an oil sample of the plant obtained from a university setting in Nigeria. The components found include 20 monoterpenes at 6.4% and 20 Sesquiterpenes at 5.1%. The Mono- and Sesquiterpenes are found in very small amounts, approximately 0.1%. The Monoterpenes present in about 1% of the oil comprise Sabinene and Pinene at 1.6%, Phellandrene, 1,8-cineole, and Limonene at 2.9%, Terpinen-4-ol at 0.6%, and Terpineol at 0.5%. Ocimene, which appears in trace quantities in the oil from the Nigerian plant, is found to constitute 5.3% of the oil from the plant sourced in India15.

 

Pinene 6.6%, Eugenol 4.4%, and Methyleugenol 1. 8% are also derived from the Indian plant oil. The main Sesquiterpenes consist of Caryophyllene, 1.9% from the oil sourced from Cameroon 21 and 10.5% in Pakistani oil 22. Cadinene is another Sesquiterpene that has been documented to be present in about 4.3% of the oil from Indian plants. Ses-quiphellandrene and Caryophyllene epoxide have additionally been found at 1.2 and 0.5 percentages, respectively.

 

Table No.3. Chemical Structures

Structure

Name

 

 

Pinene

 

 

Sabinene

 

 

Phellandre

 

 

1,8-Cineole

 

 

Limonene

 

 

Terpinen-4-ol

 

 

Terpineol

 

 

Ocimene

 

 

Eugenol

 

 

Ses-quiphellandrene

 

 

Caryophyllene epoxide

 

Phytochemical Analysis:16,17,18

The crude extracts were analyzed for phytochemical constituents, including Alkaloids, Tannins, Terpenoids, Saponins and Flavonoids using slightly modified standard procedures the techniques were as follows:

 

Table No. 4. Phytochemical analysis

Test

Procedure

Positive Result

Terpenoids

Mix 1ml Chloroform with 10mg extract and standard, ursolic acid, add 1ml 0.1M H2SO4

Reddish brown hue

Saponins

1ml of purified water combined with 10mg extract and agited vigorously for 1 min

A stable, enduring froth

Tannins

Heat 10mg extract with 2ml water, 3 drops 0.1⁒ FeCl3

Blue black tint

Alkaloids

Dissolve 10mg extract in acid alchohal, add ammonia and chloroform

Reddish –brown precipitate

Flavonoids

Mix 2 ml ammonia with 2ml extract, add 1ml 0.1 H2SO4

Yellow hue (disappear after 5 min)

 

Bioactivity:

The biological functions of the plant are discussed under following subheadings:

 

Pharmacological and Insecticidal and other biological characteristics.

 

Pharmacological:

Crude extract: The unrefined extract of the entire plant has proven to be more effective than vaseline gauze as a wound dressing. It shows neuromuscular blocking activity in rats and causes a more significant drop in diastolic pressure. Its Calcium-blocking effect is similar to that of Verapamil. The leaf extract is used to alleviate chronic pain in Osteoarthritis patients and the Methanol extract has demonstrated Antimicrobial properties19. The aqueous leaf extract interferes with blood coagulation by precipitating certain blood components and reducing bleeding time. Additionally, it exhibits analgesic properties as shown by the hot plate test while also lowering rectal temperature and reducing spontaneous motor activity. An in vitro receptor radioligand assay confirmed that its pain-modulating effects are specific to a single receptor count word20. The bradykinin BK II assay revealed a 50% inhibition that decreased following PVP treatment, suggesting phenolic compounds as the likely active agents. In contrast, no beneficial effects were observed in the CGRP and NK I assays. Clinical trials with arthritic patients using the aqueous extract of the entire plant showed that 66% experienced analgesia and 24% reported improved joint mobility, with no adverse effects noted.

 

Essential oil:

In studies with mice and rats, the essential oil from A. conyzoides exhibited significant anti-inflammatory, analgesic, and antipyretic effects. It notably reduced inflammation in the cotton pellet granuloma model at oral doses of 3 and 4ml/kg (P<0.02) and showed pain-relieving activity in both the tail-flick and writhing tests at doses of 2, 3 and 4ml/kg. Furthermore, its antipyretic action at 3ml/kg was comparable to that of 50mg/kg per os of Acetyl salicylate lysine (P<0.05), and no gastric toxicity was observed after seven days of continuous dosing21. Research into the oil's antibacterial and antifungal properties revealed its inhibitory effects against various bacterial types including Gram-positive and Gram-negative species—and both filamentous and yeast-like fungi. Notably, the oil completely suppressed the growth of four fungal strains: Candida albicans SP-14, Cryptococcus neoformas SP- 16, Sclerotium rolfsii SP-5, and Trichophyton mentagrophytes SP-1222. According to Rao, the oil inhibited the growth of five distinct bacterial and fungal species. Its principal component, Dimethoxyageratochromene 1, was notably effective against the fungi Penicillium chrysogenum and P. jaanicum. Additionally, the oil completely suppressed both spore germination and mycelial growth of Didymella bryoniae.

 

Metabolites:

While the primary metabolites aside from the essential oil have not demonstrated any pharmacological effects, various chemical families from the plant show a wide range of activities. For example, simple Chromenes and Chromans especially the 6-amino and 6-acetamido derivatives exhibit Antidepressant, Analgesic and Antipyretic properties and some are effective against trematode flatworms. Additionally Certain 2,2-dimethyl Chromene derivatives display Antimicrobial action  and Sterols, notably Stigmasterol have significant Anti-inflammatory effects. Flavonoids also contribute diverse biological functions, including diuretic, Spasmolytic, Antiviral, Anti-inflammatory, and central vascular effects23. Flavonoids are known for their Anticancer and free radical scavenging properties. However, no studies have been conducted on the biological activity of Flavonoids isolated from A. conyzoides.

 

Insecticidal and other Biological Properties:

Assays in India demonstrated that the oil caused 91% nymphal mortality in Schistocerca gregaria. The Hexane extract of the plant was found effective against Musca domestica larvae. Methanolic extracts from fresh leaves (250-500ppm) disrupted juvenile hormone levels in Chilo partellus, a sorghum pest. Precocenes I and II have been shown to affect juvenile hormone in various insect species, leading to precocious metamorphosis and the development of sterile moribund adults. These Chromenes work synergistically and are metabolically stable for at least 12 days. Initial studies on their mechanism of action have been conducted, but a limitation is their potential hepatotoxicity in rats24. The potential human health risk of using Precocenes as large- scale insecticides is a significant concern. Research on the mechanism of action suggests that toxicity may arise from the highly reactive Precocene-3,4-epoxide, a metabolite produced by Cytochrome P-450 in insects. Additionally, both the volatile oil and aqueous extract of A. conyzoides have shown allopathic effects on crops like ryegrass, mungbean, and radish, indicating potential negative impacts on cultivated plants25. The growth of radish, tomato, and ryegrass seedlings was significantly inhibited by a saturated aqueous solution of the extracted and purified Precocenes I and II. The allopathic effects of the aqueous extract of A. conyzoides varied based on the plant's organs and developmental stages as well as the habitat in which it was grown.

 

Medicinal Uses and Pharmacological Studies:

A. conyzoides is extensively employed in traditional medicine by numerous cultures globally, although its applications differ by area. Ageratum conyzoides is a versatile plant widely used in traditional medicine across various regions, including Central Africa, India, Asia, South America, and Africa. Its applications range from treating wounds, burns, and pneumonia to alleviating fever, Rheumatism, Headache, Colic, Diarrhea and Spasms. The plant is valued for its Bacteriocide, Antidysenteric , Antilithic properties and is also used as a tonic. In specific countries like Cameroon and Congo, it's used to relieve fever and rheumatism while in Brazil, it's utilized to treat various ailments, including colic and spasms and is even recommended as an anti-rheumatic due to its rapid and efficient activity in treating burn wounds26. To find efficacy, a number of pharmacological studies have been carried out. Duradola verified that ether and Chloroform extracts inhibited the growth of Staphylococcus aureus in vitro using a Methanolic extract of the entire plant.They also confirmed the inhibitory action in the development of B. subtilis, Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus were among the microorganisms studied. Additionally, the aqueous extract of Ageratum conyzoides leaves (at doses ranging from 100 to 400 mg/kg) demonstrated significant pain-relieving effects in rats.

 

Bioactivity:

The traditional application of Ageratum conyzoides as an antispasmodic was scientifically supported by experimental studies conducted in Kenya. In these assays, researchers used an aqueous extract prepared from the entire plant and observed notable muscle-relaxant activity, thereby confirming its effectiveness in relieving muscle spasms and supporting its use in traditional medicine for treating conditions involving involuntary muscle contractions.Assays carried out in Brazil by Paraiba Federal University and the State University of Campinas produced encouraging findings. Using an aqueous extract of the entire plant demonstrated effective clinical control of arthrosis, with 66% of patients reporting an Analgesic effect and 24% reporting an improvement in articulation mobility or a reduction in pain and inflammation following a week of treatment. This was observed in clinical trials involving patients with arthrosis. Ageratum conyzoides exhibits bioactive properties that could have applications in agriculture, as evidenced by various research studies in multiple nations. The leaves have been reported to function as an insect repellent. The insecticidal properties may stand out as the primary biological activity of this plant27. The antijuvenile hormonal action of Terpenic chemicals, especially Precocenes, probably contributes to the insecticidal effects. Assays using whole plant hexane extract showed that this species was effective against Musca domestica larvae.The action of Cromenes (Precocenes I and II), isolated from Ageratum plants, was reported to expedite larval metamorphosis, resulting in juvenile forms or stunted and small adults. The juvenilizing hormonal effects of Precocene I and II in Ageratum conyzoides extract has demonstrated significant insecticidal effects, particularly against various larval stages. The Methanolic extract from its leaves has been shown to induce rapid metamorphosis, resulting in sterile or dying adults, as well as morphogenetic defects in mosquito larvae, including Aedes aegypti, Culex quinquefasciatus, and Anopheles stephensi. Notably, exposure to the extract causes dark stains on the cuticle, formation of immature pupae, and juvenile hormone deficiency, highlighting its potential as a natural pest control agent. These findings suggest that A. conyzoides could be a valuable resource for developing novel insecticides28. Petroleum ether extracts of the whole plants (5 and 10 mg/L) have been used to confirm this. Incompletely grown adults, lengthier and discolored pupae, and intermediate phases between larvae and pupae were also displayed by the larvae.

 

Key Aspects of In Vitro and In Vivo Studise In Vitro Studies:29

Table No.5: In Vitro study

Category

Method

Key Findings

Antimicrobial Activity

Extracts tested against bacteria, fungi, and parasites

Growth inhibition of microbes, with flavonoids, alkaloids, and essential oils contributing to the activity.

Antioxidant Potential

DPPH, ABTS, and FRAP assays

Measurement of free radical scavenging abilities.

Cytotoxicity and Anticancer Effects

Extracts applied to cancer cell lines

Induces apoptosis or inhibits cell proliferation.

Anti-inflammatory Activity

Inhibition of COX-2, TNF-α, and IL-6

Reduction in inflammation through enzyme and marker inhibition.

Phytochemical Analysis

HPLC and GC-MS techniques

Identification of bioactive constituents contributing to therapeutic effects.

 

In vivo studies:29

Table No.6: In Vivo studies

Category

Method

Key Findings

Wound Healing Properties

Extracts tested in wound models

Enhanced healing rates through anti- inflammatory and antimicrobial mechanisms.

Anti-inflammatory and Analgesic Effects

Rodent models for edema and pain reduction

Reduction in swelling and pain through prostaglandin inhibition.

Hepatoprotective Effects

Evaluation in liver damage models (CCl₄, paracetamol)

Protective effects against liver damage induced by toxins.

Antimicrobial Efficacy

Animal infection models

Testing the ability to combat microbial infections in animals.

Toxicological Studies

Acute and chronic toxicity studies

Safety profile and determination of therapeutic dose range.

 

Findings (General Trends):

·       Ageratum conyzoides contains bioactive compounds like Precocene, Coumarin and Phenolic acids that show promise in medicinal applications.

·       Anticancer studies suggest potential for apoptosis induction via mitochondrial pathways.

·       Antibacterial properties are particularly strong against Gram-positive bacteria, likely due to membrane disruption caused by Aromatic oils.

·       Concerns about its long-term toxicity, particularly in high doses, remain under investigation.

 

Future Scope:

Ageratum conyzoides is utilized by some small-scale pharmaceutical companies in Brazil as a natural source of phytochemicals for developing various product .The scenario calls for more scientific study to invent both agricultural and medical purposes, as the need is growing annually29. The majority of medicinal plant research should concentrate on species whose pharmacological properties have previously been established. Ageratum conyzoides shows promise as a valuable economic resource for tropical countries, given its potential applications and positive preliminary clinical results. Further research is warranted to fully explore its potential, particularly in developing natural biocides and pest management agents30.

 

CONCLUSION:

Traditional medicinal research has drawn a lot of attention lately since it highlights the many undiscovered and little-known medicinal benefits, particularly those derived from plants, that require assessment using contemporary scientific methods including pharmacological screening, phytochemical analysis, and clinical trials. The literature on botanical, pharmacognostical, phytochemical, and pharmacological activity has been thoroughly reviewed in this review. Antioxidant, Antiviral, anti-inflammatory, Antibacterial, wound-healing, Antifungal, Antiallergic and Gastroprotective properties are all present in the plant. Despite Ageratum conyzoides being traditionally used to treat various ailments, its therapeutic efficacy has been scientifically evaluated in only a limited number of cases and models. To unlock its full potential, further clinical and pharmacological studies are essential to validate its effectiveness and explore new applications.

 

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Received on 05.07.2025      Revised on 19.08.2025

Accepted on 22.09.2025      Published on 04.10.2025

Available online from October 10, 2025

Asian J. Res. Pharm. Sci. 2025; 15(4):433-438.

DOI: 10.52711/2231-5659.2025.00065

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