Information from pestnet yahoogroup.
Moderator.
=============================================
Dear Colleagues,
The Fifth California Conference on Biological Control is being held
at the
historic Mission Inn in Downtown Riverside, California, USA July 25-
27,
2006.
Full details on meeting topics, registration, poster presentations
(there is
a student competition for research posters this year, two prizes of
$250),
accommodations, etc. can be found on the web at:
http://www.cnr.berkeley.edu/biocon/CCBC%20V.htm
Please forward this e-mail to colleagues who think may be interested
in
attending this meeting.
Thank you
Mark
This (P.hysterophorus) is never to be grown any where. If we want to use it for its beneficial aspects,we can get it from places where it is already growing in waste lands. Not to bring to any new place.
Secondly,It came to India in mid fifties, not in seventies. There are many references and pictures to prove this.
Thirdly, the beetle confusion was cleared by ICAR through a committee of experts who found that this beetle is unable to reproduce feeding on any other plant. It can only take shelter for while start eating leaf but perish.
I would suggest reading the book" Parthenium and its Management authored by me and published by U A S, Dharwad. It costs Rs 75/-plus postal cgarges. This book gives exhaustive information up to 1997. It is under revision and will take a few months before it is published.
M
Mahadevappa
Pankaj Oudhia <pankajoudhia@...> wrote:
Hi, While surfing net I found this site with shocking information
''Propagation Methods: From seed; direct sow outdoors in fall'
Dr. R. D. GAUTAM, Principal Scientist Plant Health Clinic, Division of Entomology, Indian Agricultural Research Institute, New Delhi-110 012. Ph. 091-11-25842413 (H), 091-11-25842482 (Off.),Fax-91(11) 25846420,Mobile-9810546703
Yahoo! Mail
Bring photos to life! New PhotoMail makes sharing a breeze.
Hi,
While surfing net I found this site with shocking information
''Propagation Methods:
From seed; direct sow outdoors in fall'
For more information visit at
http://davesgarden.com/pf/go/31927/index.html
Please give your comments.
regards
Pankaj Oudhia
I see photograph where parthenium tied near light, yes it is effective, but if the parthenium plant is green then it is more effective as compares to dry parthenium plant.
Brings words and photos together (easily) with PhotoMail - it's free and works with Yahoo! Mail.
ANOTHER REPLY.
Received: Sat, 18 Feb 2006 02:55:25 AM MST
From: tonyaws013@...
To: Dr.Pankaj Oudhia <pankaj.oudhia@...>
Subject: Re: EcoPort Pic ID=52416 Durga Pooja festival of Indian
State Chhattisgarh. Food ...
I see photograph where parthenium tied near light,
yes it is effective, but if the parthenium plant is green then it
is more effective.
--- In IPRNG@..., "Pankaj Oudhia" <pankajoudhia@i...>
wrote:
>
> Please take a look at
> http://ecoport.org/ep?SearchType=pdb&PdbID=52416
>
> and give your comments.
>
> regards
> Pankaj Oudhia
>
--- In IPRNG@..., "Pankaj Oudhia" <pankajoudhia@i...>
wrote:
>
> Please take a look at
> http://ecoport.org/ep?SearchType=pdb&PdbID=52416
>
> and give your comments.
>
> regards
> Pankaj Oudhia
>
It has also been found that instead of Parthenium plant some times
people uses Neem twigs (Azadirechta indica) to protect themselves
from the insects especially that small insects which comes near light
sources during or after rainy season. May I ask u wheather impacts of
Parthenium seen on other mosquito repellent?
Dr. Mrs. Satvant Kaur Saini.
From: "Pankaj Oudhia" <pankajoudhia@...> Reply-To: IPRNG@... To: IPRNG@... Subject: [IPRNG] Re: suggestion Date: Fri, 17 Feb 2006 08:09:06 -0000
Fully agreed.
Support from all members is required in this regard.
Pankaj Oudhia
--- In IPRNG@..., Muthukumar Bagavathiannan <vbmuthukumar@y...> wrote: > > Dear Pankaj, > > Our group is serving as a good platform for knowledge dissemination on parthenium. I would suggest that we need to take further steps to popularize this group among the weed science community around the globe. Comments please... > > Regards, > Muthu > > > > > > > > Muthukumar Bagavathiannan, > Ph.D. Scholar (Plant Sciences), > The University of Manitoba, > Winnipeg, MB, > Canada-R3T 2N2 > Ph: 001-204-269-1223 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > --------------------------------- > > What are the most popular cars? Find out at Yahoo! Autos >
Join the party
In Chandigarh, a group of retired Gandhians have made it their
mission to rid the city of invasive 'congress grass', writes Teena
Baruah
One day last July in Chandigarh, when 30 Gandhians had gathered for
one of their Sunday meetings in the whitewashed library of Gandhi
Smarak Bhawan, the conversation veered towards a 74-year-old retired
lawyer who was often spotted weeding grass from the by-lanes of
Sector 16. Amar Kant's eccentric morning routine roused their
conscience. And, with 10 volunteer neighbourhood recruits, they
decided to launch a Quit India movementthis time against parthenium,
a pandemic weed that accidentally came in wheat sacks to Pune from
Mexico in 1956, and invaded other states over the years.
For full article please visit at
http://www.harmonyindia.org/hportal/VirtualPageView.jsp?page_id=979
Pankaj Oudhia
Our group is serving as a good platform for knowledge dissemination on parthenium. I would suggest that we need to take further steps to popularize this group among the weed science community around the globe. Comments please...
Regards,
Muthu
Muthukumar Bagavathiannan,
Ph.D. Scholar (Plant Sciences),
The University of Manitoba,
Winnipeg, MB,
Canada-R3T 2N2
Ph: 001-204-269-1223
What are the most popular cars? Find out at Yahoo!
Autos
---------------------------------------------------------------------------------- Dr. M. Mahadevappa
Yes I also agree. Support frm all will go a long way to understand the behaviour of this weed,its management. its utilization.
M mahadevappa
Pankaj Oudhia <pankajoudhia@...> wrote:
Fully agreed.
Support from all members is required in this regard.
Pankaj Oudhia
--- In IPRNG@..., Muthukumar Bagavathiannan <vbmuthukumar@y...> wrote: > > Dear Pankaj, > > Our group is serving as a good platform for knowledge dissemination on parthenium. I would suggest that we need to take further steps to popularize this group among the weed science community around the globe. Comments please... > > Regards, > Muthu > >
> > > > > > Muthukumar Bagavathiannan, > Ph.D. Scholar (Plant Sciences), > The University of Manitoba, > Winnipeg, MB, > Canada-R3T 2N2 > Ph: 001-204-269-1223 > > > > > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > > > > > > > > > > > > > --------------------------------- > > What are the most popular cars? Find out at Yahoo! Autos >
---------------------------------------------------------------------------------- Dr. M. Mahadevappa
Fully agreed.
Support from all members is required in this regard.
Pankaj Oudhia
--- In IPRNG@..., Muthukumar Bagavathiannan
<vbmuthukumar@y...> wrote:
>
> Dear Pankaj,
>
> Our group is serving as a good platform for knowledge
dissemination on parthenium. I would suggest that we need to take
further steps to popularize this group among the weed science
community around the globe. Comments please...
>
> Regards,
> Muthu
>
>
>
>
>
>
>
>
Muthukumar Bagavathiannan,
> Ph.D. Scholar (Plant Sciences),
> The University of Manitoba,
> Winnipeg, MB,
> Canada-R3T 2N2
> Ph: 001-204-269-1223
>
>
>
>
>
>
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> ---------------------------------
>
> What are the most popular cars? Find out at Yahoo! Autos
>
Our group is serving as a good platform for knowledge dissemination on parthenium. I would suggest that we need to take further steps to popularize this group among the weed science community around the globe. Comments please...
Regards,
Muthu
Muthukumar Bagavathiannan,
Ph.D. Scholar (Plant Sciences),
The University of Manitoba,
Winnipeg, MB,
Canada-R3T 2N2
Ph: 001-204-269-1223
What are the most popular cars? Find out at Yahoo! Autos
Welcome Puja.
Moderator.
=============
Hello, I am Puja Ray working as SRF at NRCWS Jabalpur, on biocontrol of
parthenium and water hyacinth using insect and fungal agents. It would
be nice interacting with other members of the group.
Puja Ray
Another Interesting paper.
Pankaj Oudhia
======================================
Weeds and the monitoring of biodiversity in Australian rangelands
A. C. GRICE
Abstract Monitoring the biodiversity of Australian rangelands has
been identified as a means of informing policy and supporting funding
decisions in relation to the conservation of biodiversity. Australian
rangelands are subject to invasion by alien plants that have the
potential to have major impacts on ecosystem function and
biodiversity, although there has been little quantitative
documentation of these effects. Research is needed to improve our
understanding of how and to what extent alien plants affect
biodiversity in Australian rangelands so that this relationship can
be considered when developing and implementing programmes to monitor
biodiversity. It is also important to consolidate existing efforts to
quantify the extent of alien plant invasions and monitor their
progress, thus documenting a process that threatens biodiversity.
Information on the presence and abundance of alien plant species
should be considered for inclusion as a component of biodiversity
monitoring programmes that are undertaken. Monitoring components of
biodiversity can itself provide a basis for evaluating weed
management strategies.
http://www.blackwell-synergy.com/links/doi/10.1111/j.1442-
9993.2004.01364.x
Here is interesting research paper from one of our members. I am
forwarding it as Sunday reading.
regards
Pankaj Oudhia
========================================
Impact of Invasive Plants on the Structure and Composition of Natural
Vegetation of Northwestern Indian Himalayas1
RAVINDER K. KOHLI, KULDIP S. DOGRA, DAIZY R. BATISH, and HARMINDER
PAL SINGH2
http://wssa.allenpress.com/wssaonline/?request=get-document&issn=0890-
037X&volume=018&issue=05&page=1296
Abstract: Himachal Pradesh situated in the lap of northwestern
Himalayas is one of the richest repositories of plant diversity in
India. However, during the past three decades, because of the
increased pace of development and interference of humans through
introduction of invasive exotics, the ecology of the state has
changed tremendously. Ragweed parthenium, billy goat weed, and
lantana—the three exotics from South America—have caused much harm in
the state because of their invasive potential. A study conducted to
assess the changes in the structural composition and dynamics of
vegetation shows that density and diversity of native flora were
adversely affected because of invasion by these three exotics.
Because all the three exotic weeds are known to exhibit allelopathy,
it might be one of the major nonresource–based hypothesis for the
successful invasion by these exotic species.
Nomenclature: Billy goat weed, Ageratum conyzoides L.; lantana,
Lantana camara L.; ragweed parthenium, Parthenium hysterophorus L.
Additional index words: Diversity, dominance, ecological status,
Importance Value Index, invasive weeds, species richness, vegetation
analysis.
Abbreviation: IVI, Importance Value Index.
INTRODUCTION Return to TOC
Invasive plants are known to exert significant impact on the native
communities, resulting in their displacement and hence an imbalance
in natural and agricultural ecosystems (Pimentel et al. 2001 ; Sakai
et al. 2001 ). This imbalance results in the formation of large
monocultures of invasive plants in the alien environment. In fact,
invasive species are an important component of global change
(Vitousek et al. 1996 ). Invasion may be accidental or deliberate, as
a result of introduction of some species on purpose. The success of
these species in the alien and new environment may be attributed to
several reasons. Many theories have been proposed in this direction.
Possession of a set of traits by the invasive species as proposed by
Baker (1974) in case of ideal weeds may not be always true because
some species possessing only a subset of traits may be very invasive
in nature (Williamson and Brown 1986 ). Among the theories proposed
for the success of invasive species, absence of natural enemies
(pathogens, predators, or pests) known as Natural Enemies Hypothesis
or alternatively allelopathy (through the release of chemicals into
the environment) has been proposed (Heirro and Callaway 2003 ).
Besides, invasive species also have an ability to undergo genetic
changes due to selection pressure imposed by the alien environment
and exhibit quick response to anthropogenic disturbances (Sakai et
al. 2001 ). It is thus essential to study the mechanism of
invasiveness in alien environment especially regarding their
colonization, expansion, establishment, and ecological impact so as
to take timely action for their management.
India, one of the 12 megacenters of origin of cultivated plants, is
also one of the richest centers of biodiversity. Its rich diversity
is attributed to varied climatic conditions and its geography.
Himalayas, the well-known mountain ranges in India, passing through
many sovereign states of the country, are the storehouses of plant
diversity. Himachal Pradesh is one such state in the northwestern
India. Unfortunately, increasing anthropogenic disturbances, tourism,
pollution levels, rapid industrialization, and urbanization, besides
introduction of exotics, have put a great stress on the native
vegetation. Invasive plant species are a cause of concern, causing a
serious threat to the structure and dynamics of the natural plant
communities. A number of exotic species introduced either
deliberately or accidentally have been encountered in this state. Of
these, three weedy species, viz., billy goat weed, lantana, and
ragweed parthenium, all native to tropical America, are the most
abundant (Anonymous 2003 ). These are rapidly invading the forest
areas, grassland, agricultural lands, and pastures at the cost of the
native species, thereby causing a serious impact on the structure and
dynamics of the native vegetation.
A study was therefore conducted to evaluate the incidence of these
three exotic invasive weeds at different altitudinal ranges of the
state to study their impact on the ecological structure and
composition of the native vegetation.
MATERIALS AND METHODS Return to TOC
Study Site. This study was conducted in the hilly state of Himachal
Pradesh (30°22′40 to 33°12′40N and 75°45′55 to 79°4′20E)
located in
northwestern India (Figure 1 ). The state has an area of 5.97 Mha,
with altitude varying from 244 to 6,750 m and the climate ranging
from subtropical to alpine/semiarctic. Nearly 66.5% of the state has
been recorded as under forest cover (Forest Survey of India 2001 ).
The altitude increases from west to east and from south to north.
Vegetation Analysis. Geographically, the state can be generally
divided into three distinct regions, viz., lower or Shivaliks (350 to
1,500 m), middle (1,500 to 4,500 m), and the upper or the alpine
Himalayas (>4,500 m). For this study, the state was divided into 12
grids (equivalent to district)—four in each region. Each district was
divided into five zones and each zone into five locations. At each
location, five quadrats (2 m2) were laid randomly. In other words,
the study comprised nearly 300 sites and 1,500 quadrats (500 in each
region), and these were laid in such a manner so as to cover the
whole area evenly. In each quadrat, vegetation analysis was done, and
all the plants appearing were sampled, identified, and their
Importance Value Index (IVI) was calculated (Misra 1968 ). The
analysis was done over a span of 2-yr period, i.e., 2002 and 2003.
IVI was calculated using the following formula:
where
Furthermore, the vegetation was analyzed for species richness,
evenness, diversity, and dominance through ecological indices to
reduce complexity of data (Whittaker 1953 ). Though a great variety
of indices are available, to avoid conceptual and technical problems
and to get precision, only a few such as Margalef's richness, Hill's
evenness, Shannon's diversity, and Simpson's index of dominance are
applicable (Ludwig and Reynolds 1988 ). These indices were computed
as per the following formulas, using the statistical package of
Ludwig and Reynolds (1988) .
where S = total number of species, N = total number of individuals
of all the species, and ni = number of individuals of the ith species.
Furthermore, the IVI value of the species in the different study
areas was analyzed using the lognormal distribution to describe
abundance patterns. For this, species were arranged in order of their
abundance (starting from most common to most rare species) and
plotted against log10 of IVI values, thereby indicating abundance
pattern of vegetation.
Statistics. To cover whole of the districts, sites and locations were
so chosen. Quadrats were laid randomly at selected locations,
maintaining five replications. Data were analyzed by two-sample t
test wherever necessary.
RESULTS AND DISCUSSION Return to TOC
As per survey study, in 2002 to 2003, 9.4% of total species in the
state of Himachal Pradesh were found to be exotic, whereas the rest
(90.6%) were native ones. It was in sharp contrast to just 5% exotic
species reported in the survey conducted during 1987 to 1988 (H. P.
Forest Department 1988). In other words, the number of exotic species
has almost doubled over a period of 15 yr or so. Because most of the
exotics have a tendency to be invasive, the IVI and abundance data of
three most invasive weeds were calculated from all the three altitude
ranges of the state.
As regards billy goat weed, the reason for its greater IVI than
ragweed parthenium is attributed to climatic conditions because the
weed grows luxuriantly in the agricultural fields during winters.
Surprisingly, ragweed parthenium, which has played havoc in the
plains of India, is still in the process of colonization in the hilly
state of Himachal Pradesh (Figure 2 ). The data indicate that the
process of invasion by these three weeds is continuous and expanding
in the lower and middle Himalayas, but they are not present in the
upper Himalayas.
Further studies on the selected weeds were undertaken in the highly
infested areas of lower Himalayas so as to determine their impact on
the structural composition of the vegetation. In the presence of
billy goat weed, a total of 12 plant species were encountered,
whereas in the lantana- and ragweed parthenium–infested areas, 10 and
14 species, respectively, were counted in comparison with 25 in
uninfested areas (Table 1 ). Likewise, density and biomass in the
respective areas infested with three selected weeds were
significantly less compared with native vegetation (Table 1 ). The
density was reduced by nearly 64.4, 82.5, and 67.6% in areas infested
with billy goat weed, lantana, and ragweed parthenium, respectively.
Likewise, biomass was reduced by nearly 52.7, 72.4, and 59.6%,
respectively.
Richness index, a measure of numerical strength of vegetation, was
significantly less in the weed-infested than in the uninfested areas.
It was nearly 2.2 and 2.6 times more in the uninfested areas compared
with areas infested by billy goat weed and lantana, respectively
(Table 1 ). Likewise, the evenness index was comparatively more in
the uninfested areas, indicating that species are evenly distributed,
whereas the lesser values in the weed-infested areas indicate
patchiness in distribution. The Shannon's index also indicated
greater plant diversity in the uninfested areas, whereas this index
was reduced by 36 to 51% in the weed-infested areas (Table 1 ). The
higher values of index of diversity indicate the variability in the
type of species and heterogeneity in the communities, whereas the
lesser values point to the homogeneity in the community. On the
contrary, the index of dominance was minimum in uninfested controls
compared with weed-infested areas. It was maximum in billy goat weed–
infested areas, followed by lantana and ragweed parthenium (Table
1 ). The higher the value of index of dominance, the greater is the
homogenous nature of the community and vice versa. In other words,
such communities are dominated by single species. Furthermore, more
the homogenous nature of the community, lesser is the diversity and
hence stability, i.e., such habitats are subjected to renewed
disturbances and are occupied by more opportunistic and
environmentally flexible species with wider ecological amplitude. In
this study, where higher values of index of dominance vis-à-vis the
lesser diversity was observed in the weed-infested areas, indicating
the greater instability in such areas. Such a pattern is also clear
when the IVI values in all the weed-infested areas were plotted with
species rank using a lognormal distribution pattern (Figure 3 ). In
all three weed-infested areas, an abrupt decrease in vegetation
compared with uninfested areas was noticed. The lognormal
distribution for the uninfested areas indicates a normal curve of
vegetation (Figure 3 ). The changed structure of vegetation in the
infested areas may be due to the allelopathic influence of these
weeds because this has been reported to be an alternative hypothesis
among nonresource interactions besides several other factors (Bais et
al. 2003 ). Reasons for the depletion of vegetation were not explored
in this investigation; however, it is certain that these three weeds
are adversely affecting the structure and composition in the lower
and middle ranges of Himalayas. Thus, it calls for timely steps to
check their further spread.
ACKNOWLEDGMENTS
This work was carried under the B. P. Pal National Environment
Fellowship Award support to Ravinder Kumar Kohli by the Ministry of
Environment and Forests, Government of India. We are thankful to the
research staff of the laboratory for their help in carrying out this
work.
LITERATURE CITED Return to TOC
Anonymous. 2003. Report of Two Days Workshop on Management of Weeds
(Congress grass, Lantana, Neela Fulnu) Through Community
Participation. March 25–26, 2003. Shimla, India: State Council for
Science, Technology and Environment.
Bais, H. P., R. Vepachedu, S. Gilroy, R. M. Callaway, and J. M.
Vivanco. 2003. Allelopathy and exotic plant invasion: from molecules
and genes to species interactions. Science. 301:1377–1380.
Baker, H. G. 1974. The evolution of weeds. Ann. Rev. Ecol. Syst. 5:1–
24.
Forest Survey of India. 2001. State of Forest Rep. 2001. Dehradun,
India: Forest Survey of India. 58 p.
Heirro, J. L., and R. M. Callaway. 2003. Allelopathy and exotic plant
invasion. Plant Soil. 256:29–39.
Hill, M. O. 1973. Diversity and its evenness, a unifying notation and
its consequences. Ecology. 54:427–432.
H. P. Forest Department. 1988. Himachal Forests. Shimla, India: H. P.
Forest Department. Pp. 1–2.
Ludwig, J. A., and J. F. Reynolds. 1988. Statistical Ecology, A
Primer on Methods and Computing. New York: J. Wiley. Pp. 85–103.
Margalef, R. 1958. Temporal succession and spatial heterogeneity in
phytoplankton. In A. A. Buzzati-Traverso, ed. Perspective in Marine
Biology. Berkeley: University of California Press. Pp. 323–347.
Misra, B. 1968. Ecology Work Book. New Delhi, India: Oxford and IBH.
Pp. 31–51.
Pimentel, D., S. McNair, and J. Janecka. et al. 2001. Economic and
environmental threats of alien plant, animal, and microbe invasions.
Agric. Ecosyst. Environ. 84:1–20.
Sakai, A. K., F. W. Allendorf, and J. S. Holt. et al. 2001. The
population biology of invasive species. Annu. Rev. Ecol. Syst. 32:305–
332.
Shannon, C. E., and W. Weaver. 1963. The Mathematical Theory of
Communication. Urbana, IL: University of Illinois Press. Pp. 31–35.
Simpson, E. H. 1949. Measurement of diversity. Nature. 163:688
Vitousek, P. M., C. M. D'Antonio, L. L. Loope, and R. Westbrooks.
1996. Biological invasions as global environmental change. Am. Sci.
84:218–228.
Whittaker, R. H. 1953. A consideration of climax theory, the climax
as a population and pattern. Ecol. Monogr. 23:41–78.
Williamson, M., and K. Brown. 1986. The analysis and modeling of
British invasion. Philos. Trans. R. Soc. Lond. Ser. B. 314:505–522.
----------------------------------------------------------------------
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TABLES Return to TOC
Table 1.Ecological parameters of the three selected weedy species
----------------------------------------------------------------------
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FIGURES Return to TOC
Click on thumbnail for full-sized image.
Figure 1. Map of India showing study site (Himachal Pradesh)
Click on thumbnail for full-sized image.
Figure 2. Importance Value Index of three selected weeds in the lower
and middle Himalayas, Himachal Pradesh, India
Click on thumbnail for full-sized image.
Figure 3. Lognormal distribution of vegetation in the areas infested
by the selected weed species or in uninfested areas. Species are
ranked in order of their decreasing Importance Value Index values
1Received for publication January 14, 2004, and in revised form May
20, 2004.
2Professor and Coordinator and Research Fellow, Centre for
Environment, and Associate Professor and Research Scientist,
Department of Botany, Panjab University, Chandigarh 160014, India.
Corresponding author's E-mail: rkkohli45@...
----------------------------------------------------------------------
----------
Welcome to the group.
Moderator.
---Original message-
respected sir, Iam working on the management of parthenium,so I want to
know the recent developments on parthenium by joining in your group.
thanking you sir J.Asha kumari
jastikumari@...
Rain brings weed woes
Taroom Shire Council says rain has triggered outbreaks of the weed
parthenium.
Some property owners say thunderstorms have been dumping more than
100 millimetres of rain at a time during the past six weeks.
Mayor Don Stiller says council needs to get on top of the weed before
it spreads.
"Since we've had reasonably good rain over a reasonable area of the
shire over the last six weeks, parthenium has popped up where we
didn't expect it in places and worse than we expected in other
places," he said.
"We believe we've got it under control under 90 per cent of the
shire, but there's patches we're going to make a very concerted
effort to hold the line."
http://www.abc.net.au/news/newsitems/200601/s1551484.htm
----- Message from Wolfgang Nentwig <wolfgang.nentwig@...>
on
Wed, 18 Jan 2006 12:37:16 +0100 -----
To: aliens-l@...
Subject: Re: [Aliens-L] European Alien Species Expertise Registry
Dear colleagues
Within the actual EU project DAISIE
http://www.europe-aliens.org
a European Alien Species Expertise Registry has now been established.
This
registry intends to collect the expertise of experts which may be
useful
to gather the knowledge on those species which are actually alien in
Europe or may become so. Thus, unlike its title, we want to gather
the
expertise of experts from all over the world, since species alien to
Europe come from all over the world.
The expertise registry contains details for individual experts with
respect to taxonomic expertise, geographic units, and thematic areas
(e.g.
distribution, conservation, restoration, ecology, economical impact,
genetics, legislation, administration, management, control,
biocontrol,
pathways, transportation, physiology, risk assessment, taxonomy,
systematics).
The expertise registry has only now been set up and grows. We hope to
include already within this year a relevant part of experts and
expertise.
This will enable us to analyse this expertise and to draw
conclusions.
One
of our goals is a paper which may become a political postulation to
ameliorate the expertise in those areas where it is not sufficient.
You
see, it may also become important for yourself, in the long run, to
be
included into our registry.
Please take the time to register at http://daisie.ckff.si
the registry should be self explanatory, and it will take you only 5
minutes. Forward this message to other experts which may not have
been
reached by this mail.
Many thanks and best regards
Wolfgang Nentwig
_______________________________________________
New Parthenium Publication.
Evolution of clinical pattern of parthenium dermatitis: a study of 74
cases
Vinod K. Sharma1*, Gomathy Sethuraman1 and Radhakrishna Bhat1
Contact Dermatitis
Volume 53 Page 84 - August 2005
doi:10.1111/j.0105-1873.2005.00652.x
Volume 53 Issue 2
Our aim was to study the evolution of clinical pattern of parthenium
dermatitis. Patients with clinical picture consistent with parthenium
dermatitis for 3 years or more along with positive patch test to
parthenium were studied. Patients were questioned regarding the site
(s) of dermatitis at the onset and change in localization in the
following years. Patients were classified into airborne contact
dermatitis, chronic actinic dermatitis (CAD) pattern or mixed pattern
dermatitis. There were 74 patients (49 men and 25 women) with an age
range of 22–70 years and the mean duration of 7.7 years. 60 (39 men
and 21 women) patients had airborne contact dermatitis, 5 mixed
pattern and 9 CAD pattern at the onset. Of the 60 patients with
airborne contact dermatitis, 27 (19 men and 8 women) changed to CAD
pattern and 11 (6 men and 5 women) to mixed pattern after an average
period of 4.2 years. Of the 19 patients photopatch-tested with
parthenium, 3 showed photoallergic reaction and the other 3 showed
photoaggravation. Our results suggest that the clinical pattern of
parthenium dermatitis undergoes a significant change after the onset,
i.e. progresses from airborne contact dermatitis to mixed pattern or
CAD pattern.
http://www.blackwell-synergy.com/doi/abs/10.1111/j.0105-
1873.2005.00652.x
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