Host - range and specificity of two pasteuria isolates from Kerala, India
| dc.contributor.author | Sosamma, V.K. | |
| dc.date.accessioned | 2014-07-25T06:26:43Z | |
| dc.date.available | 2014-07-25T06:26:43Z | |
| dc.date.issued | 2002 | |
| dc.description.abstract | Pasteuria spp. are natural parasites of nematodes and hence have great potential as biocontrol agents. An isolate of Pasteuria penetrans was recovered from root-knot nematode, Meloidogyne incognita (PPMI) from Vandanmedu , Idukki district in Kerala. Host range and spore morphometrics of this isolate was studied.The endospores of this isolate had a mean diameter of 4.8 pm. Based on the spore encumberances on J2 nematode cuticle, Heterodera oryzicola was found to be a host. Hoplolairnus seinhorsti, Pratylenchus coffeae, Aphelenchus avenae, Aphelenchoides aligarhiensis found as non hosts. Eggs were also found attached with the endospores. Spores were seen throughout the entire female body and the female may either be killed or allowed to attain maturity. However, such females did not produce any eggs. The infective propagules were released when the nematode body decomposed and remained free in the soil until contacted by susceptible nematodes. Host range and spore morphology of another isolate of Pasteuria sp. recovered from the rice cyst nematode , Heterodera oryzicola(PPH0) from a banana field near Kayangulam, Alapuzha district, Kerala was also studied. Spores of this isolate had a mean diameter of 6 pm. Based on spore encumberance on nematode cuticle of Radopholus sirnilis (females, males 81 larvae), Hoplolairnus seinhorstiand Malenchus sp. were reported as hosts. M. incognita, R. reniforrnis ,Xiphinerna arnericanurn andX. elongaturn were reported as non-hosts. Spores were collected by crushing the infested cysts,crushed cysts mixed with sterile sandy loam soil was used for screening various nematode species .The results suggest that the Pasteuria isolates found in Kerala are different in their host-range and spore morphology from species reported else where. | en_US |
| dc.identifier.citation | Plantation Crops Research and Development in the New Millennium (2002): 511-513 | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/4388 | |
| dc.language.iso | en | en_US |
| dc.subject | biological control | en_US |
| dc.subject | bacteria | en_US |
| dc.subject | cyst nematode | en_US |
| dc.subject | burrowing nematode | en_US |
| dc.subject | root- knot nematode | en_US |
| dc.subject | host range | en_US |
| dc.title | Host - range and specificity of two pasteuria isolates from Kerala, India | en_US |
| dc.type | Article | en_US |