Pathogenicity and avoidable yield loss due to Meloidogyne incognita in French bean
KrishiKosh
View Archive InfoField | Value | |
Title |
Pathogenicity and avoidable yield loss due to Meloidogyne incognita in French bean
|
|
Creator |
Mohapatra, Sagarika
|
|
Contributor |
Sahoo, S
|
|
Subject |
root knot Nematode, French bean, nematicide
|
|
Description |
The study was conducted to determine potential level of damage by root knot nematode, Meloidogyne incognita in French bean c.v. contender. Fifteen days old seedlings grown in sterilized earthen pots each containing one kg steam sterilized soil were inoculated with 10,100,1000 and 10000 freshly hatched second stage Juveniles (J 2 ) of Meloidogyne incognita. The experiment was terminated after 60 days of inoculation and observations were recorded on plant growth characters and nematode multiplication. Findings revealed that an inoculum level of 1000 and above J 2 / plant significantly decreased the plant growth parameters. Nematode reproduction rate decreased with an increase in inoculum levels. It was maximum (107.4 times) at inoculum level of 10 J 2 / plant and minimum (2.05 times) at 10000 J 2 / plant. Nematode population in soil and root increased progressively with an increase in nematode inoculum level from 10 to 10000 J 2 / plant. Maximum population was recorded at inoculum level of 10000 J 2 / plant followed by 1000 J 2 / plant which was statistically at par with that of 10000 J 2 / plant. This clearly indicated that the threshold inoculum density of M.incognita causing significant reduction of various growth parameters in French bean was 1000 J 2 per plant.The field experiment conducted in a root knot nematode sick plot by growing French bean c.v. contender in pair plot design showed 18.77 % avoidable yield loss due to M.incognita. Significant differences were observed in plant heights, fresh and dry weights of plants between nematicidal treated and untreated plots. The treatment with nematicide resulted reduction in final nematode population i.e., 69.55% in soil, 73.27% on root and 45.00% decrease in root knot index. |
|
Date |
2017-01-04T12:24:05Z
2017-01-04T12:24:05Z 2015 |
|
Type |
Thesis
|
|
Identifier |
http://krishikosh.egranth.ac.in/handle/1/94388
|
|
Language |
en
|
|
Relation |
Th;4509
|
|
Format |
application/pdf
|
|