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Anticoccidial Activity of Eupatorium adenophorum Extracts Against Chicken Coccidian Oocysts
J.F. Yang,R.Q. Wang,R.Q. Lv,D.H. Zhou,G. Duan,F.C. Zou
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2012.1255.1257
Abstract: The potential anticoccidial activity of Eupatorium adenophorum extracts was evaluated against coccidian oocysts which are common parasites in poultry farms. Fresh unsporulated coccidian oocysts were exposed to 2, 1.5, 1 or 0.5% of E. adenophorum extracts and the sporulation rate was measured after 72 h. A total of 80 chickens were inoculated with those attenuated oocysts. After 1 week, the birds were challenged with 1x105 untreated fresh sporulated oocysts and the survival rate, Oocyst Per Gram feces (OPG), cecum lesion score, body weight gain rate and Anticoccidal Index (ACI) were measured and calculated on the 8th day after the challenge infection. The extracts of E. adenophorum were found to be significantly effective against coccidian oocyst activity (p<0.05). These results indicate that E. adenophorum may potentially be a new alternative for effective and environmentally-friendly control of coccidiosis. The results also have important implications for the development of attenuated coccidiosis vaccine.
Antibacterial and Antifungal Effect of Eupatorium adenophorum Spreng against Bacterial and Fungal Isolates  [PDF]
Nabin Bhattarai,Geeta Shrestha
Nepal Journal of Science and Technology , 2009, DOI: 10.3126/njst.v10i0.2834
Abstract: A research work on antimicrobial effect of water solvent and organic solvent extracts of different concentration of Eupatorium adenophorum (Spreng) was conducted at Nepal Academy of Science and Technology (NAST) during August 2008. Fifteen strains of bacteria, six strains of fungi and two concentrations, 50% and 100% of plant extracts were taken for the study. Among the 15 strains of bacteria, most of them were inhibited with E. adenophorum extracts and only three species, Klebsiella oxytoca , K. pneumoniae and Shigella dysenteriae did not show antibacterial activity with the same extract. Extracts obtained from the organic solvent and water solvent showed different antimicrobial properties with the same bacterial strains. Those bacterial strains whose growth was inhibited by water solvent could not inhibited by organic solvent extracts. Organic solvent extract showed antibacterial effect towards Proteus spp., Salmonella spp., Staphylococcus spp., Bacillus subtilis , B. thurengiensis , B. cereus , Enterobacter aerogenes , Salmonella paratyphi , Staplococcus aureus , Proteus mirabilis and water solvent extract showed antibacterial effect towards Peudomonas aeruginosa , E. coli , Staphylococcus aureus , Staphylococcus spp., Citrobacter frundii , Proteus spp., B. subtilis , B. thurengiensis , Enterobacter aerogenes , Salmonella spp. and S. paratyphi. Altogether 12 species out of 15 were inhibited by E. adenophorum extracts. Both solvent extracts showed high antibacterial effect towards Proteus spp . , Staphylococcus spp., Staphylococcus aureus and Pseudomonas aeruginosa. Among the six species of the fungi, Fusarium spp. were inhibited by plant extract while the Aspergillus spp. and Stenophylum botryosum did not show any effect of the extracts. The plant extracts showed selective effect with different strains of bacteria and fungi, which indicated that they were confined to cure the same bacterial diseases and fungal diseases. Key words: Plant extract; Bacteria; Fungi; Antibacterial; Antifungal; Eupatorium adenophorum DOI: 10.3126/njst.v10i0.2834 Nepal Journal of Science and Technology Volume 10, 2009 December Page: 91-95
Predicting the Potential Invasive Distribution for Eupatorium adenophorum Spreng. in China
紫茎泽兰Eupatorium adenophorum Spreng.在中国入侵分布预测

Monica Papes,A Townsend Peterson,
Monica Papes
,A.Townsend Peterson

植物科学学报 , 2003,
Abstract: Originating in Mexico, Eupatorium adenophorum Spreng., is a noxious weed long present as a non native species in India, New Zealand, and Australia. In China, it is spreading rapidly, particularly in the southern and southwestern parts of the country, with serious economic and social consequences. A new method, ecological niche modeling, was applied for predicting its potential geographic range of invasion. Predicted potential distributional areas included the Chinese provinces where the plant is known to occur, as well as additional areas in central and eastern China that appear susceptible to further spread of this species.
A Congeneric Comparison Shows That Experimental Warming Enhances the Growth of Invasive Eupatorium adenophorum  [PDF]
Wei-Ming He, Jing-Ji Li, Pei-Hao Peng
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0035681
Abstract: Rising air temperatures may change the risks of invasive plants; however, little is known about how different warming timings affect the growth and stress-tolerance of invasive plants. We conducted an experiment with an invasive plant Eupatorium adenophorum and a native congener Eupatorium chinense, and contrasted their mortality, plant height, total biomass, and biomass allocation in ambient, day-, night-, and daily-warming treatments. The mortality of plants was significantly higher in E. chinense than E. adenophorum in four temperature regimes. Eupatorium adenophorum grew larger than E. chinense in the ambient climate, and this difference was amplified with warming. On the basis of the net effects of warming, daily-warming exhibited the strongest influence on E. adenophorum, followed by day-warming and night-warming. There was a positive correlation between total biomass and root weight ratio in E. adenophorum, but not in E. chinense. These findings suggest that climate warming may enhance E. adenophorum invasions through increasing its growth and stress-tolerance, and that day-, night- and daily-warming may play different roles in this facilitation.


生态学报 , 1983,
Abstract: The experiment was undertaken to evaluate the influences of environmental factors on the seed germination of Eupatorium adenophorum Spr. and especially on the germinating period. The results may be summarized as follows:1. The ripe seeds of Eupatorium adenophorum Spr. have higher percentage of germination under the favorable conditions, but they do not germinate in the darkness and in the abnormal pH value.2. The seeds can germinate only in a range of pH 4-7, but not over pH 8 or below pH 3. The optimum pH ...
Soil Biota Reduce Allelopathic Effects of the Invasive Eupatorium adenophorum  [PDF]
Xunzhi Zhu,Jintun Zhang,Keping Ma
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0025393
Abstract: Allelopathy has been hypothesized to play a role in exotic plant invasions, and study of this process can improve our understanding of how direct and indirect plant interactions influence plant community organization and ecosystem functioning. However, allelopathic effects can be highly conditional. For example allelopathic effects demonstrated in vivo can be difficult to demonstrate in field soils. Here we tested phytotoxicity of Eupatorium adenophorum (croftonweed), one of the most destructive exotic species in China, to a native plant species Brassica rapa both in sand and in native soil. Our results suggested that natural soils from different invaded habitats alleviated or eliminated the efficacy of potential allelochemicals relative to sand cultures. When that soil is sterilized, the allelopathic effects returned; suggesting that soil biota were responsible for the reduced phytotoxicity in natural soils. Neither of the two allelopathic compounds (9-Oxo-10,11-dehydroageraphorone and 9b-Hydroxyageraphorone) of E. adenophorum could be found in natural soils infested by the invader, and when those compounds were added to the soils as leachates, they showed substantial degradation after 24 hours in natural soils but not in sand. Our findings emphasize that soil biota can reduce the allelopathic effects of invaders on other plants, and therefore can reduce community invasibility. These results also suggest that soil biota may have stronger or weaker effects on allelopathic interactions depending on how allelochemicals are delivered.
Noxious invasive Eupatorium adenophorum may be a moving target: Implications of the finding of a native natural enemy, Dorylus orientalis
YanFen Niu,YuLong Feng,JianLei Xie,FuCheng Luo
Chinese Science Bulletin , 2010, DOI: 10.1007/s11434-010-4117-0
Abstract: Eupatorium adenophorum is a noxious invasive weed that is distributed throughout subtropical areas worldwide. Enemy release may be at least one of the reasons underlying its success as an invader. In this study, we observed damage to the epidermis, cortex, phloem, cambium, and xylem tissues of roots and stems around the root collar of E. adenophorum growing in an experimental field in Yunnan Province, southwest China. The damage was caused by Dorylus orientalis, a polyphagous ant feeding on the weed and resulted in the death of the plants by interrupting nutrient exchange between shoots and roots. This ant showed selectivity for the invader to some extent. The finding of D. orientalis and other native enemies indicate that E. adenophorum may gradually naturalize in introduced landscapes. In addition, this ant may have potential for use as a biocontrol agent against the invader.
CO2 exchange characteristics of Eupatorium adenophorum Spreng

WANG Wenjie,ZU Yuangang,MENG Qinghuan,YANG Fengjian,ZHAO Zehai,CAO Jianguo,

生态学报 , 2005,
Abstract: Eupatorium adenophorum is a famous invasive and alien species and few studies have clarified its invasive ability via study on the gas exchanges characteristics. The gas exchange characteristics of reproductive organs (flower and fruit) and vegetative organs (stem, root, and leaf)of E. adenophorum Spreng. were discussed in this study in comparison with 8 local species and reported herbaceous and woody plant groups around the world. A wide range of photosynthetic and respiration rates was observed in leaves ...
Influence of Artemisia annua on the competition effect of Eupatorium adenophorum

- , 2015,
Abstract: 采用复合De Wit取代试验设计方法,分析入侵杂草紫茎泽兰(Eupatorium adenophorum)与本土植物黄花蒿(Artemisia annua)的竞争关系,观察不同种植密度和种植比例对紫茎泽兰生长特性的影响。结果表明: 在紫茎泽兰和黄花蒿混种样地中,紫茎泽兰相对产量(RYg)和相对密度(RDg)均小于1; 随着黄花蒿混种比例的增加,紫茎泽兰的RYg和RDg均逐渐减小,同时紫茎泽兰的茎宽、分枝数、生物量逐渐降低; 紫茎泽兰与黄花蒿之间的竞争大于紫茎泽兰的种内竞争,黄花蒿的存在抑制了紫茎泽兰种群数量的扩增; 在黄花蒿混种比例较高的情况下,随着种群密度的增加,紫茎泽兰的根冠比逐渐降低,同时紫茎泽兰的株高逐渐增加; 紫茎泽兰能采取地上优先生长策略应对黄花蒿的强大竞争压力; 在紫茎泽兰入侵早期利用黄花蒿进行替代控制,可获得较好的防治效果。
The competition relation between Eupatorium adenophorum and Artemisia annua was studied by using the multiple De Wit replacement series design method, which discussed the effects of growing character of E.adenophorum in different planting densities and mixture proportions. The results showed that the relative yield (RYg) and the relative density (RDg) were less than 1 in mixture sample area between E.adenophorum and A.annua; with the increase of the mixture proportion of A.annua,the RYg and RDg of E.adenophorum were gradually decreasing, and stem diameter, branch number and biomass were also decreasing, which implied that the competition between E.adenophorum and A.annua was severer than intraspecific competition of E.adenophorum and the population expansion of E.adenophorum was restrained when A.annua existed. With the increase of the population density under the circumstance of higher mixture proportion of A.annua, root/shoot radio of E.adenophorum had a trend of reduction,but plant height of E.adenophorum had a trend of increase, which suggested that E.adenophorum had to adopt the allocation of resources model, namely, the strategy of the ground priority growth in response to stronger pressure of competition of A.annua. Based on the above results, we should replace E.adenophorum with A.annua at the early stages of invasion to have a good effect on the control of E.adenophorum.
Seed population dynamics and germination characteristics of Eupatorium adenophorum

WANG Wenqi,WANG Jinjun,ZHAO Zhimo,

应用生态学报 , 2006,
Abstract: With bare land, farmland, and masson pine forestland in the Eupatorium adenophorum- invaded area of Dechang County, Sichuan Province as test habitats, this paper studied the seed population dynamics of E. adenophorum at the levels of seed rain and seed bank, and its seed germination characteristics under effects of light and soil medium. The results showed that in the three habitats, the seed population of E. adenophorum only existed from March to June, and reached its peak by the end of April. The annual seed rainfall in bare land habitat amounted to 2.4 x 10(5) individuals per square meter, and all the seeds were distributed in the soil layer above 2 cm. The thousand seed weight and seed activity of E. adenophorum in bare land habitat were significantly higher than those in another two habitats. No active seed was found in the three habitats by the first ten days of July. Under artificial light condition, full light had some inhibitory effects on seed germination, while 28% of full light gave the highest germination rate. Sandy loam soil was more favorable for the seed germination, while in un-reclaimed red soil, both the germination velocity and germination rate were the lowest.
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