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Bio-Control for Parthenium, noxious weed discovered |
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by Sujan Adhikari | 07-11-2016 11:01
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Parthenium hysterophorus L.
Parthenium hysterophorus L. is a noxious weed commonly called carrot weeds and become worst weed of urban and rural areas of Nepal. It is considered one of the world's most invasive weed. Contact with this plant causes dermatitis and respiratory malfunction in humans, dermatitis in cattle and domestic animals, due to the presence of toxin parthenin. This foreign weed is increasingly becoming a problem in roadsides, protected forest, pasture and fallow land in Nepal. Now it is found all areas of the country from east to west and terai to hills. The weed entered in Indian subcontinent via wheat seed in 1950s from USA. It can trigger allergies and is a common cause of pollen allergy. This weed dispersed all-round the country and become matter of headache for farmers, scientists, ecologists, medical and veterinary practitioners due to it's wide spread effect in farming system, bio-diversity, human and livestock health. Bio-control Agent
Zygogramma bicolorata Pallister is an important bio-control agent of this weed. It was first introduced to India in 1984 from Mexico that's why also known as Mexican beetle. Mr. Ram Bahadur Khadka, Scientist, Regional Agriculture Research Station (RARS), Khajura, Nepalgunj, Banke, Nepal in his schedule of technical visit found the Mexican beetle at Gulariya Municipality, Bardiya, Mid-Western Nepal, at completely defoliated Parthenium plants in April 26, 2014 and about 7 copulating pairs of adult beetles were collected in plastic container and kept in the adult Parthenium plants making cage around it at the station in Khajura. The beetles have completely defoliated the plants inside the net and population was increased upto1000. Now it has been maintained in glass/ screen house with relay cropping of parthenium once after defoliation. This is an encouraging result of works carried out by Mr. Khadka which in future would help to control parthenium biologically through rearing Mexican beetles and releasing them in Parthenium affected areas and around. |
 
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12 Comments
Hello sujan
I hope you are doing well
Thank you so much for this report
Green cheers
Regards
Asmita Gaire
Posted 12-05-2020 02:20
Greetings sujan
I hope you are doing well
Thank you so much for this report
Keep writing
I hope to read more from you
Green cheers
Regards
Susmita
Posted 25-03-2020 02:20
Greeting Sujan
I hope you are doing well
Nicely written
Thank you so much for this report.
Keep writing
Green cheers!
Regards
Basanta
Posted 23-03-2020 10:53
thanks for sharing
Posted 07-02-2018 22:17
good report
Posted 07-02-2018 22:16
Interesting! Yeah just like many others have already said, thanks for giving us the new information and wow that is so much better than spraying harmful chemicals around everywhere. Thanks for taking time to share this :D
Posted 12-11-2016 13:52
Thanks for aware us regarding this invasive plant and also about the bio- control agent. May I know how this plant is being spread?
Posted 08-11-2016 13:05
wow i never knew about this before thanks for sharing
Posted 08-11-2016 02:53
I really enjoyed reading your article ......thank u for sharing Sujan
Posted 08-11-2016 00:38
It's better to use bio control agents or biopesticide to kill weeds rather than using chemical ones. Thanks for the report.
Posted 07-11-2016 23:11
Thanks for reporting, Sujan! Instead of using chemical products, it is nice to see using natural ways to get rid of these foreign weeds. I also have similar question with John are these bio-control agents still under study? Won't their number increase in such a fast speed that can destroy the habitat in other ways? Have a great day today : )
Posted 07-11-2016 19:10
It's nice to have some daily dose of scientifically-approached reports. Thank you, Sujan. However, just one thing. I have taken entomology as one of my undergrad courses and using insects as bio-control agents is very common nowadays. Hence, there are now series of protocols developed before releasing the studied insect into the field for such purpose. With this context, I can see that the methodology conducted isn't still enough so I just would like to make sure and ask if these beetles are still continuously undergoing laboratory trials, right? Moreover, as for validation, did the beetle exhibited other peculiar behavior such as consuming other plants aside from the targeted one? Once again, thank you Sujan for the awesome report! GREAT JOB! :D
Posted 07-11-2016 11:39