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[IBC] Root Nodules and Neea buxifolia
Billy, Henrik, and Michael
Thank you for the fruitful information. I think the shape of the nodules was globular like small beads in a thread. Why I suspect these to be of Nematodes is because in India dung manure is freely used as a buffer in making compost and unfortunately it is not treated or sterilized. The infected plant keeps on growing although slowly. And in a bid to survive I think the plant struggles and keeps on throwing new roots. Can Nina correct me on this observation please? Regards Anil Kaushik Bonsai Club (India) ************************************************** ****************************** ++++Sponsored, in part, by Evergreen Gardenworks++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
(Anil Kaushik) wrote:
Thank you for the fruitful information. I think the shape of the nodules was globular like small beads in a thread. Why I suspect these to be of Nematodes is because in India dung manure is freely used as a buffer in making compost and unfortunately it is not treated or sterilized. The infected plant keeps on growing although slowly. And in a bid to survive I think the plant struggles and keeps on throwing new roots. Can Nina correct me on this observation please? Hi Anil! You kept me busy. First I tried to find out if members of the Nyctagineaceae had any nitrogen-fixing symbionts that made root nodules. A number of plants do, and these nodules are often mistaken for nematode galls. I found nothing, however. So then I looked around for information on the nematode susceptibility of more common plants in the Nyctaginaceae (such as Bougainvillea and Mirabilis; Neea is rather obscure). I found that neither of those is very susceptible; a susceptible plant will have "beads on a thread" as you described, but a less susceptible plant will only have a few scattered galls. So I have no idea what those swellings are- as someone suggested, cutting one open and examining it under a dissecting scope would answer the question in a minute. As for manu manure would contain one heck of a lot of nematodes, but not PLANT PATHOGENIC ones. 99% of nematodes are free-living saprophytes, without whom we would be wading in manure. Very few are parasites of animals or plants. The plant parasites would not be in manure, so I wouldn't worry about it. Plant pathogenic nematodes generally spread VERY SLOWLY in soil, or are transported by farm machinery in caked mud. Foliar nematodes can be spread by water splash. If uncomposted manure had an adverse effect on bonsai, it would be due to the production of ammonium, which is toxic to plants at high concentrations. Nina. |
(Anil Kaushik) wrote:
Thank you for the fruitful information. I think the shape of the nodules was globular like small beads in a thread. Why I suspect these to be of Nematodes is because in India dung manure is freely used as a buffer in making compost and unfortunately it is not treated or sterilized. The infected plant keeps on growing although slowly. And in a bid to survive I think the plant struggles and keeps on throwing new roots. Can Nina correct me on this observation please? Hi Anil! You kept me busy. First I tried to find out if members of the Nyctagineaceae had any nitrogen-fixing symbionts that made root nodules. A number of plants do, and these nodules are often mistaken for nematode galls. I found nothing, however. So then I looked around for information on the nematode susceptibility of more common plants in the Nyctaginaceae (such as Bougainvillea and Mirabilis; Neea is rather obscure). I found that neither of those is very susceptible; a susceptible plant will have "beads on a thread" as you described, but a less susceptible plant will only have a few scattered galls. So I have no idea what those swellings are- as someone suggested, cutting one open and examining it under a dissecting scope would answer the question in a minute. As for manu manure would contain one heck of a lot of nematodes, but not PLANT PATHOGENIC ones. 99% of nematodes are free-living saprophytes, without whom we would be wading in manure. Very few are parasites of animals or plants. The plant parasites would not be in manure, so I wouldn't worry about it. Plant pathogenic nematodes generally spread VERY SLOWLY in soil, or are transported by farm machinery in caked mud. Foliar nematodes can be spread by water splash. If uncomposted manure had an adverse effect on bonsai, it would be due to the production of ammonium, which is toxic to plants at high concentrations. Nina. |
Thank you very much Nina for taking all the trouble! In fact these root
nodules were in Ficus benghalensis and Chinese elm and not in Neea buxifolia. There were two different topics. Any ways you have enriched my knowledge about Nematodes and also those of the members of our club. Regards Anil Kaushik Bonsai Club (India) Chandigarh ----- Original Message ----- From: "Nina Shishkoff" To: Sent: Monday, September 13, 2004 6:57 PM Subject: [IBC] Root Nodules and Neea buxifolia (Anil Kaushik) wrote: Thank you for the fruitful information. I think the shape of the nodules was globular like small beads in a thread. Why I suspect these to be of Nematodes is because in India dung manure is freely used as a buffer in making compost and unfortunately it is not treated or sterilized. The infected plant keeps on growing although slowly. And in a bid to survive I think the plant struggles and keeps on throwing new roots. Can Nina correct me on this observation please? Hi Anil! You kept me busy. First I tried to find out if members of the Nyctagineaceae had any nitrogen-fixing symbionts that made root nodules. A number of plants do, and these nodules are often mistaken for nematode galls. I found nothing, however. So then I looked around for information on the nematode susceptibility of more common plants in the Nyctaginaceae (such as Bougainvillea and Mirabilis; Neea is rather obscure). I found that neither of those is very susceptible; a susceptible plant will have "beads on a thread" as you described, but a less susceptible plant will only have a few scattered galls. So I have no idea what those swellings are- as someone suggested, cutting one open and examining it under a dissecting scope would answer the question in a minute. As for manu manure would contain one heck of a lot of nematodes, but not PLANT PATHOGENIC ones. 99% of nematodes are free-living saprophytes, without whom we would be wading in manure. Very few are parasites of animals or plants. The plant parasites would not be in manure, so I wouldn't worry about it. Plant pathogenic nematodes generally spread VERY SLOWLY in soil, or are transported by farm machinery in caked mud. Foliar nematodes can be spread by water splash. If uncomposted manure had an adverse effect on bonsai, it would be due to the production of ammonium, which is toxic to plants at high concentrations. Nina. ************************************************** ************************** **** ++++Sponsored, in part, by Evergreen Gardenworks++++ ************************************************** ************************** **** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ ************************************************** ****************************** ++++Sponsored, in part, by Evergreen Gardenworks++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
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