scholarly journals PM 9/31 (1) Ambrosia trifida

EPPO Bulletin ◽  
2021 ◽  
Keyword(s):  
Ambrosia Trifida

Competition between Ambrosia artemisiifolia and Ambrosia trifida : Is there a threat of a stronger competitor?

Weed Research ◽  
2021 ◽  
Author(s):  
Aleksandra Savić ◽  
Mostafa Oveisi ◽  
Dragana Božić ◽  
Danijela Pavlović ◽  
Markola Saulić ◽  
...  
Keyword(s):  
Ambrosia Artemisiifolia ◽  
Ambrosia Trifida

Monographs on invasive plants in Europe N°5: Ambrosia trifida L.

2021 ◽  
pp. 1-23
Author(s):  
Bruno Chauvel ◽  
Guillaume Fried ◽  
Swen Follak ◽  
Daniel Chapman ◽  
Yuliana Kulakova ◽  
...  
Keyword(s):  
Invasive Plants ◽  
Ambrosia Trifida

scholarly journals CLINICAL AND IMMUNOLOGICAL EFFECTIVENESS OF TREATMENT OF RAGWEED POLLINOSIS IN THE SAMARA REGION

2021 ◽  
Vol 23 (4) ◽  
pp. 921-926
Author(s):  
N. N. Zhukova ◽  
M. V. Manzhos ◽  
L. R. Khabibulina ◽  
E. Yu. Syrtsova
Keyword(s):  
Allergic Rhinitis ◽  
Russian Federation ◽  
Allergic Diseases ◽  
Ambrosia Artemisiifolia ◽  
Control Group ◽  
Ambrosia Trifida ◽  
Results Of Treatment ◽  
Amb A 1 ◽  
The Russian Federation ◽  
Time Changes

Allergic rhinitis and bronchial asthma are widespread respiratory allergic diseases. In some territories of the Russian Federation, the dominant cause of pollinosis is ragweed. The aim of the study was to evaluate the clinical and immunological efficacy of ASIT with the allergen Ambrosia artemisiifolia in patients sensitized to Ambrosia trifida in the Samara region. Patients with proven sensitization to Ambrosia trifida was held immunotherapy with Ambrosia artemisiifolia allergoid preseason. After treatment, patients had a decrease in the severity of symptoms of allergic rhinitis according to VAS (p = 0.00001), a decrease in the need for medications (p = 0.0003), as well as the need for corticosteroids against the background of therapy from 34.6% to 0% (p = 0.00001). In 8% of cases, the result of treatment was good, in 69% satisfactory, in 23% unsatisfactory. In the control group, there were no changes in the severity of symptoms (p = 0.858). Also, in the control group, the need for medications remained unchanged and 14.3% of patients continued to use corticosteroids.After ASIT, there was a decrease in the level of IL-4 (p = 0.002), and a decrease in the ratio of IL-4/ IL-10 (p = 0.0063); at the same time, changes in the level of other cytokines (IL-10; IFNγ) were statistically insignificant (p > 0.05). Before treatment, the levels of IL-4/ IL-10 in both groups were comparable, and after treatment, the differences became statistically significant (p = 0.031). We did not get a statistically significant change in the level of IgG4 Amb a 1 or IgG4 Amb trifida. There was no correlation between the level of individual cytokines and the results of treatment. As a result of the conducted ASIT, positive clinical and immunological results were obtained. In most patients, the disease has acquired a controlled course. At the same time, the lack of excellent and low number of good results of ASIT is probably due to the intraspecific allergenic properties of ragweed. 

scholarly journals The significance of biomass allocation to population growth of the invasive species Ambrosia artemisiifolia and Ambrosia trifida with different densities

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Wenxuan Zhao ◽  
Tong Liu ◽  
Yan Liu ◽  
Hanyue Wang ◽  
Ruili Wang ◽  
...  
Keyword(s):  
Cluster Formation ◽  
Ambrosia Artemisiifolia ◽  
High Density ◽  
High Population ◽  
Leaf Biomass ◽  
Total Biomass ◽  
Low Density ◽  
Population Densities ◽  
Ambrosia Trifida ◽  
Short Period

Abstract Background Ambrosia artemisiifolia and Ambrosia trifida are globally distributed harmful and invasive weeds. High density clusters play an important role in their invasion. For these two species, the early settled populations are distributed at low densities, but they can rapidly achieve high population densities in a short period of time. However, their response to intraspecific competition to improve the fitness for rapid growth and maintenance of high population densities remains unclear. Therefore, to determine how these species form and maintain high population densities, individual biomass allocations patterns between different population densities (low and high), and plasticity during seedling, vegetative, breeding and mature stages were compared. In 2019, we harvested seeds at different population densities and compared them, and in 2020, we compared the number of regenerated plants across the two population densities. Results Most biomass was invested in the stems of both species. Ambrosia trifida had the highest stem biomass distribution, of up to 78%, and the phenotypic plasticity of the stem was the highest. Path analysis demonstrated that at low-density, total biomass was the biggest contributor to seed production, but stem and leaf biomass was the biggest contributors to high-density populations. The number of seeds produced per plant was high in low-density populations, while the seed number per unit area was huge in high-density populations. In the second year, the number of low-density populations increased significantly. A. artemisiifolia and A. trifida accounted for 75.6% and 68.4% of the mature populations, respectively. Conclusions High input to the stem is an important means to regulate the growth of the two species to cope with different densities. These two species can ensure reproductive success and produce appropriate seed numbers. Therefore, they can maintain a stable population over time and quickly form cluster advantages. In the management, early detection of both species and prevention of successful reproduction by chemical and mechanical means are necessary to stop cluster formation and spread.

scholarly journals The danger of the spread dangerous quarantine weed — giant ragweed (Ambrosia trifida L.)

2018 ◽  
pp. 83-89
Author(s):  
O. Marieva ◽  
O. Zhuiboroda
Keyword(s):  
Native Species ◽  
High Speed ◽  
Arable Land ◽  
The State ◽  
Natural Vegetation ◽  
Ambrosia Trifida ◽  
Economic Relations ◽  
Grain Crops ◽  
Agricultural Equipment ◽  
Giant Ragweed

The expansion of trade and economic relations with other countries increased the risk of importing new invasive types of weeds into the state. One of them is a serious danger weed — giant ragweed (Ambrosia trifida L.). This weed with high speed and aggressiveness inhabits and displacing native species in agricultural and non-arable land, including landscapes of big cities. A. trifida extends to non-arable lands with disturbed natural vegetation. This species is spreading through the contamination of seeds and agricultural equipment. It damaged soybeans, legumes and corn, as well as other grain crops. Increasing of this weed pollen in the air is a source of a massive disease with allergies. At present, there is danger of entry by this weed to Ukraine from neighboring countries.

scholarly journals Glyphosate-Resistant Giant Ragweed (<i>Ambrosia trifida</i> L.) in Ontario: Dose Response and Control with Postemergence Herbicides

2012 ◽  
Vol 03 (05) ◽  
pp. 608-617 ◽  
Author(s):  
Joseph P. Vink ◽  
Nader Soltani ◽  
Darren E. Robinson ◽  
François J. Tardif ◽  
Mark B. Lawton ◽  
...  
Keyword(s):  
Dose Response ◽  
Ambrosia Trifida ◽  
Giant Ragweed ◽  
And Control ◽  
Postemergence Herbicides

Glyphosate-Resistant Giant Ragweed (Ambrosia trifida) Control with Glufosinate or Fomsafen Combined with Growth Regulator Herbicides

2013 ◽  
Vol 27 (3) ◽  
pp. 454-458 ◽  
Author(s):  
Kelly A. Barnett ◽  
Thomas C. Mueller ◽  
Lawrence E. Steckel
Keyword(s):  
Field Study ◽  
Growth Regulator ◽  
Effective Control ◽  
Ambrosia Trifida ◽  
Herbicide Resistant ◽  
Giant Ragweed ◽  
Herbicide Treatments ◽  
Fallow Field ◽  
Contrast Analysis

The development of crops resistant to 2,4-D, dicamba, and glufosinate may provide new options for the management of glyphosate-resistant (GR) giant ragweed and other herbicide-resistant weeds. A fallow field study was conducted in 2011 and 2012 to determine the control of GR giant ragweed with 2,4-D and dicamba applied alone and in combination with glufosinate or fomesafen. Dicamba and 2,4-D tank-mixed with glufosinate or fomesafen provided the highest level of control at 10 or 20 days after application (DAA). At 30 DAA, all herbicide treatments provided > 88% control of giant ragweed except glyphosate, glufosinate, and 2,4-D alone at 0.56 kg ae ha−1. Glyphosate, glufosinate, and 2,4-D alone at 0.56 kg ae ha−1also had the highest number of giant ragweed plants (> 5.8 plants m−2) and highest biomass (> 19.2 g m−2). Contrast statements between 2,4-D and dicamba indicated no differences among treatments containing these herbicides. However, contrast analysis indicated that herbicides applied alone resulted in 56, 58, and 61% control while tank-mix combinations of 2,4-D or dicamba with glufosinate or fomesafen resulted in 86, 91, and 93% control, respectively. Herbicides applied alone also had more giant ragweed plants and biomass per m−2than herbicides applied in tank-mix combinations. Tank-mixing combinations of 2,4-D and dicamba will be important for effective control of GR giant ragweed.

Sign in / Sign up

Export Citation Format

Share Document