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Evaluation of promising chickpea (Cicer arietinum L.) genotypes and IPM modules against Helicoverpa armigera (Hubner)

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Title Evaluation of promising chickpea (Cicer arietinum L.) genotypes and IPM modules against Helicoverpa armigera (Hubner)
 
Creator Sabbithi Pavan
 
Contributor Dahiya, K.K.
 
Subject Chickpea genotypes, Screening, Helicoverpa armigera, Avoidable yield loss, IPM modules
 
Description The present investigation “Evaluation of promising chickpea (Cicer arietinum L.) genotypes and IPM modules
against Helicoverpa armigera (Hubner)” revealed that none of the 21 genotypes screened against Helicoverpa armigera
showed complete resistance to the pest during both years of the study 2012-13 and 2013-14. The pest susceptible rating
ranged from 3 to 6 during (2012-13) and (2013-14). During both the seasons of the study, the highest pest susceptible rating
6 was observed in H08-61.
The simple correlation study between the various phenotypic characters and H armigera incidence during both the
years indicated that there is a significant negative correlation with flowering initiation, 50 per cent flowering, 100 per cent
flowering, full pod setting, total pod per plant, whereas the significant positive correlation was recorded with plant height,
secondary branches and full pod maturity.
The minimum larval population was recorded during 5th standard meteorological week, which gradually increased
and attain a peak during 14th standard meteorological week. Further, the pest population gradually declined towards the
maturity of the crop at 15th standard meteorological week of both 2013 and 2014.
Correlation coefficient of H armigera larval population with different weather parameters during first season of
the study revealed that the larval population exhibited a highly significant positive correlation with maximum temperature,
minimum temperature, wind speed, and pan evaporation respectively, a highly non significant positive correlation with
sunshine hours, while, ground minimum, morning relative humidity and evening relative humidity exhibited highly
significant negative correlation, where as rainfall exhibited highly non significant negative correlation during second season
of the study correlation coefficient of H armigera larval population with different weather parameters revealed that the larval
population exhibited a highly significant positive correlation with maximum temperature, minimum temperature, sunshine
hours, and pan evaporation respectively where as ground minimum, wind speed and rainfall exhibited highly non significant
positive correlation, where as morning relative humidity and evening relative humidity exhibited highly significant negative
correlation.
Larval period of H armigera when reared on leaves and pods of four promising genotypes showed that maximum
larval period (18.80 days) was on foliage and minimum was (12.70 days) on pods. Maximum pupal period was (16.80 days)
on foliage of genotype (GNG-1488) and minimum pupal period of (10.80 days) on pods of genotype (H04-28). The adult
emergence was 92.47 per cent on foliage and 84.75 per cent on pods. The ratio of males and females was 1:1 when the insect
was reared on foliage and 1:3 on pods. Maximum oviposition period (13.89 days) was found on pods and minimum (11.33
days) on foliage. Maximum fecundity per female 841.20 was observed on pods and minimum on foliage 725.02. The
maximum male longevity was 18.14 days observed on pods and minimum 16.82 days on foliage. Maximum female longevity
was 23.45 days was observed on pods and minimum of 19.82 days on foliage.
The maximum pod damage (12.41 and 18.62 was recorded in both protected and unprotected conditions in
genotype GNG-1488 and minimum pod damage was recorded in H01-27 (3.20 and 8.39 %). Genotype H01-27 provided
maximum grain yield of 16.22 and 10.48 q/ha in both protected and unprotected conditions. The highest avoidable yield loss
of 43.97 % was observed in the genotype GNG-1488.
Among the modules evaluated, module M4 with coriander intercropping containing sequential spray with
novaluron 1.2 l/ha followed by scheduled spray malathion (2ml/l) was found most effective during both the years of study
with the highest benefit cost ratio over control during both seasons of study.
 
Date 2016-08-19T12:08:16Z
2016-08-19T12:08:16Z
2016
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/72987
 
Language en
 
Format application/pdf
 
Publisher CCSHAU