Status and distribution of root knot nematode (Meloidogyne spp.) and other plant parasitic nematodes associated with rice (Oryza sativa L.) in Dehradun and Haridwar districts of Uttarakhand
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Date
2022-07, 2022-08
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G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145
G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145
G.B. Pant University of Agriculture and Technology, Pantnagar, District Udham Singh Nagar, Uttarakhand. PIN - 263145
Abstract
An extensive survey has been carried out in Dehradun and Haridwar districts of Uttarakhand and 148 samples were collected. Locations are mapped using arc GIS software. Microscopic morphological studies revealed the presence of ten genera of PPN’s viz., Criconemoides spp., Ditylenchus spp., Hoplolaimus spp., Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp., Pratylenchus spp., Tylenchorhynchus spp., Tylenchus spp. and Xiphinema spp. Hirschmanniella spp. was the most predominant PPN in five blocks followed by Meloidogyne spp. in three blocks. Maximum total nematode population among all blocks was recorded from Garhi Shyampur village (4349/200cc soil) of Rishikesh block of Dehradun and Tihri village (4217/200cc soil) of Bahadrabad Block from Haridwar. Maximum total RKN population (4700 J2/200cc soil and per g root) was recorded from village Redapur of Sahaspur Block from Dehradun district and Aiki village from Laksar Block of Haridwar district (12233 J2/200cc soil and per g root). Highest average population of Hirschmanniella spp. was found in Doiwala block with 598 Individual/200cc of soil and of Meloidogyne spp. in Laksar and Roorkee block with 612 J2/200cc of soil. Soil pH showed negative correlation with Helicotylenchus spp., Meloidogyne spp., Pratylenchus spp., Tylenchorhynchus spp. and Tylenchus spp. Soil organic carbon showed negative correlation with Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp., Pratylenchus spp. and Tylenchorynchus spp. Soil moisture showed positive significant correlation with Cricocemoides spp., Ditylenchus spp., Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp., Pratylenchus spp., and Xiphinema spp. Soil temperature showed negative significant correlation with Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp. and Tylenchorynchus spp. Shannon-Wiener Diversity Index of 1.75 is calculated for Dehradun district and 1.66 for Haridwar district which shows that species in Dehradun are higher with more even distribution Based on the results present study, it is inferred that rice root nematode is the most serious threat to the rice crop in followed by rice root-knot nematode. Both the nematodes show more than ninety per cent frequency of occurrence in all the surveyed blocks.
An extensive survey has been carried out in Dehradun and Haridwar districts of Uttarakhand and 148 samples were collected. Locations are mapped using arc GIS software. Microscopic morphological studies revealed the presence of ten genera of PPN’s viz., Criconemoides spp., Ditylenchus spp., Hoplolaimus spp., Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp., Pratylenchus spp., Tylenchorhynchus spp., Tylenchus spp. and Xiphinema spp. Hirschmanniella spp. was the most predominant PPN in five blocks followed by Meloidogyne spp. in three blocks. Maximum total nematode population among all blocks was recorded from Garhi Shyampur village (4349/200cc soil) of Rishikesh block of Dehradun and Tihri village (4217/200cc soil) of Bahadrabad Block from Haridwar. Maximum total RKN population (4700 J2/200cc soil and per g root) was recorded from village Redapur of Sahaspur Block from Dehradun district and Aiki village from Laksar Block of Haridwar district (12233 J2/200cc soil and per g root). Highest average population of Hirschmanniella spp. was found in Doiwala block with 598 Individual/200cc of soil and of Meloidogyne spp. in Laksar and Roorkee block with 612 J2/200cc of soil. Soil pH showed negative correlation with Helicotylenchus spp., Meloidogyne spp., Pratylenchus spp., Tylenchorhynchus spp. and Tylenchus spp. Soil organic carbon showed negative correlation with Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp., Pratylenchus spp. and Tylenchorynchus spp. Soil moisture showed positive significant correlation with Cricocemoides spp., Ditylenchus spp., Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp., Pratylenchus spp., and Xiphinema spp. Soil temperature showed negative significant correlation with Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp. and Tylenchorynchus spp. Shannon-Wiener Diversity Index of 1.75 is calculated for Dehradun district and 1.66 for Haridwar district which shows that species in Dehradun are higher with more even distribution Based on the results present study, it is inferred that rice root nematode is the most serious threat to the rice crop in followed by rice root-knot nematode. Both the nematodes show more than ninety per cent frequency of occurrence in all the surveyed blocks.
An extensive survey has been carried out in Dehradun and Haridwar districts of Uttarakhand and 148 samples were collected. Locations are mapped using arc GIS software. Microscopic morphological studies revealed the presence of ten genera of PPN’s viz., Criconemoides spp., Ditylenchus spp., Hoplolaimus spp., Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp., Pratylenchus spp., Tylenchorhynchus spp., Tylenchus spp. and Xiphinema spp. Hirschmanniella spp. was the most predominant PPN in five blocks followed by Meloidogyne spp. in three blocks. Maximum total nematode population among all blocks was recorded from Garhi Shyampur village (4349/200cc soil) of Rishikesh block of Dehradun and Tihri village (4217/200cc soil) of Bahadrabad Block from Haridwar. Maximum total RKN population (4700 J2/200cc soil and per g root) was recorded from village Redapur of Sahaspur Block from Dehradun district and Aiki village from Laksar Block of Haridwar district (12233 J2/200cc soil and per g root). Highest average population of Hirschmanniella spp. was found in Doiwala block with 598 Individual/200cc of soil and of Meloidogyne spp. in Laksar and Roorkee block with 612 J2/200cc of soil. Soil pH showed negative correlation with Helicotylenchus spp., Meloidogyne spp., Pratylenchus spp., Tylenchorhynchus spp. and Tylenchus spp. Soil organic carbon showed negative correlation with Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp., Pratylenchus spp. and Tylenchorynchus spp. Soil moisture showed positive significant correlation with Cricocemoides spp., Ditylenchus spp., Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp., Pratylenchus spp., and Xiphinema spp. Soil temperature showed negative significant correlation with Helicotylenchus spp., Hirschmanniella spp., Meloidogyne spp. and Tylenchorynchus spp. Shannon-Wiener Diversity Index of 1.75 is calculated for Dehradun district and 1.66 for Haridwar district which shows that species in Dehradun are higher with more even distribution Based on the results present study, it is inferred that rice root nematode is the most serious threat to the rice crop in followed by rice root-knot nematode. Both the nematodes show more than ninety per cent frequency of occurrence in all the surveyed blocks.