great, Anil nice to know the dx
Univ Michigan has a nice page for diagnosis: https://pestid.msu.edu/weeds-and-plant-identification/johnsongrass-sorghum-halepense/ And Dr.A.Suganya ji: when do you think it came to India and how wide spread is it? i found a short but very interesting history of its introduction to USA: Its called JOHNSON GRASS BECAUSE A MR JOHNSON INTRODUCED IT TO USA IN 1840.... This link is for a thoughtfully written and researched essay on Johnson grass. https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html I quote from the page GENERAL DISTRIBUTION: *Johnson grass* is native to the *Mediterranean region of Europe and Africa, and possibly to Asia Minor.* Worldwide, its range as a weed extends from 55° N to 45° S in latitude [96 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#96>, 128 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#128> ]. It was widely introduced in North America, Europe, Africa, and southwestern Asia [184 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#184> ], and was also introduced in Brazil, Argentina [155 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#155>], and northern Australia [78 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#78>]. In North America it occurs in southern Ontario south through all the contiguous United States except Maine [72 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#72>, 109 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#109>, 206 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#206>] to the Rio Grande Delta region of Tamaulipas and the Cape region of Baja California Sur in Mexico [204 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#204>]. Johnson grass also occurs in Hawaii and the Caribbean [109 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#109>]. In the United States, Johnson grass was introduced in South Carolina from Turkey around 1830. William Johnson, whom the plant is named after, established Johnson grass along the Alabama River in the 1840s as a forage species, and Johnson grass spread rapidly across the South [14 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#14>, 149 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#149>, 170 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#170>, 182 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#182>]. Johnson grass is now widely escaped from cultivation in much of the United States. It is most invasive in the Southeast, although it is widespread in central California and New Mexico [122 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#122>, 128 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#128>, 206 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#206> ]. Johnson grass is not persistent in the Pacific Northwest, upper northern Great Plains, extreme northern portions of the Great Lake states, the Northeast [70 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#70>, 110 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#110>, 132 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#132>, 194 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#194> ], or in Arizona, Colorado, and Utah [111 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#111>, 200 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#200>, 201 <https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html#201> ]. Plants database <https://plants.usda.gov/> provides a state distributional map of Johnson grass." end quote For references listed above , you have to go to page in the link below…. https://www.fs.fed.us/database/feis/plants/graminoid/sorhal/all.html " it also mentions that its a good forage grass. too much of it may cause nitrogen toxicity, though. several other websites list it as a weed: https://www.invasiveplantatlas.org/subject.html?sub=3075 and this site https://wiki.bugwood.org/Sorghum_halepense says " i quote" Pest/Weed Considerations *Sorghum halepense* is considered to be one of the ten worst weeds in the world.[1] <https://wiki.bugwood.org/Sorghum_halepense#cite_note-holm-1> Fifty-three countries, ranging in latitude from 55 N to 45 S report Johnson grass as a major problem; the problem is most serious in the region from the Mediterranean to the Middle East and* India, * Australia, central South America and the Gulf Coast of the United States.[1] <https://wiki.bugwood.org/Sorghum_halepense#cite_note-holm-1>" end quote " my question are there publications or webpages regarding this pest status in india and when did it come to India???? usha di On Sat, Jul 14, 2018 at 12:33 PM, J.M. Garg <[email protected]> wrote: > This one is Sorghum helpense?- from Anil ji. > > ---------- Forwarded message ---------- > From: suganya m d <[email protected]> > Date: 4 July 2018 at 16:59 > Subject: Re: [efloraofindia:299080] Fwd: Plant for identification 200618 SR > To: "J.M. Garg" <[email protected]> > > > > > Need ID please > > with regards > Dr.A.Suganya > Principal Scientist (Economic Botany) > Division of Crop Improvement > Sugarcane Breeding Institute (ICAR) > Coimbatore 641007, Tamil Nadu > Web: www.sugarcane.res.in > Phone: Office: 0422-2472621 Extn:234 > E-mail: [email protected] > Mobile: 09043373325 > > > > > -- > With regards, > J.M.Garg > > 'Creating awareness of Indian Flora & Fauna' > <http://en.wikipedia.org/wiki/User:Jmgarg1> > > Winner of Wipro-NFS Sparrow Awards 2014 for efloraofindia > <https://sites.google.com/site/efloraofindia/award-for-efloraofindia>. > > For identification, learning, discussion & documentation of Indian Flora, > please visit/ join our Efloraofindia Google e-group > <https://groups.google.com/forum/#!forum/indiantreepix> (largest in the > world- around 2975 members & 2,90,000 messages on 31.3.18) or Efloraofindia > website <https://sites.google.com/site/efloraofindia/> (with a species > database of more than 12,000 species & 3,00,000 images). > > The whole world uses my Image Resource > <http://commons.wikimedia.org/wiki/Category:J.M.Garg> of more than a > thousand species & eight thousand images of Birds, Butterflies, Plants etc. > (arranged alphabetically & place-wise). You can also use them for free as > per Creative Commons license attached with each image. > > Also author of 'A Photoguide to the Birds of Kolkata & Common Birds of > India'. > > -- > You received this message because you are subscribed to the Google Groups > "efloraofindia" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/indiantreepix. > For more options, visit https://groups.google.com/d/optout. > -- Usha di =========== -- You received this message because you are subscribed to the Google Groups "efloraofindia" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. Visit this group at https://groups.google.com/group/indiantreepix. For more options, visit https://groups.google.com/d/optout.
