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Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur

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2014 - 20192
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Subject: Genetics and Plant Breeding × Author: Verma, Vikas ×
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    ThesisItemOpen Access
    Tapping wild Cicer species for enriching variability in cultivated genepool for chickpea improvement
    (Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, 2019) Verma, Vikas; Babbar, Anita
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    ThesisItemOpen Access
    Genetic variability, correlation and path analysis in field pea
    (JNKVV, 2014) Verma, Vikas; Dubey, R.K.
    ABSTRACT Present research work on “Study on the Seasonal incidence of insect pests complex of Gram and their management through bio-pesticides and chemical pesticides” was conducted in Rabi 2013-14 at J.N.K.V.V., Research Farm, College of Agriculture, Tikamgarh (M.P.).The experiment was conducted with the following objectives. 1. To note the seasonal incidence of major insect pests of gram. 2. To find out the efficacy of some bio-pesticides and chemical pesticides against major insect pests of gram. 3. To work out the economics of the management of major insect pests . of gram. Study on seasonal incidence of major insect pests and their management of gram through bio-pesticides and chemical pesticides was studied and it was revealed that gram pod borer (Helicoverpa armigera, Lepidoptera, Noctuidae) was only a major and most devastating insect which cause damaged 65 per cent to the crop. The infestation of H. armigera was started from the 49th SMW (03 December to 09 December) and it was continued up to 13th SMW (26 March to 1 April). During the peak activity of the pest, the maximum population (5.00 larvae/mrl) was recorded in the 10th SMW (05 March to 11 March). During this period the maximum and minimum temperature respectively were 27.00 0C and 11.50 0C, relative humidity in the morning and evening was respectively 87% and 44%. Correlation studies revealed that maximum temprature exhibited significantly positive correlation (r= +0.49) with Helicoverpa armigera larval population. A negative but very weak correlation between Helicoverpa larval population and morning relative humidity, evening relative humidity and rainfall (r = -0.25, -0.44 and -0.05 respectively), were observed to non significantly level. Where as positive correlation between Helicoverpa larval population and abiotic parameters viz. minimum temperature and evaporation (r = +0.32 and r = +0.42 ), were also found to be non-significant. Under chemical control eleven insecticides including some newer one were tested against Helicoverpa armigera larvae in the field. All the insecticidal treatments proved to be effective in reducing overall larval population. Flubendiamide 39.35SC performed best recording lowest population (0.66 larvae per metre row length), followed by indoxacarb 14.5EC (0.84 larvae/mrl), emamectin benzoate 5SG (0.87 larvae/mrl) cypermethrin 25EC (0.98 larvae/mrl), fipronil 5SC (1.11 larvae/mrl), quinalphos 25EC (1.15 larvae/mrl), cartap hydrochloride 50SP (1.22 larvae/mrl), NPV (1.32 larvae/mrl),B.t. (1.44 larvae/mrl) and NSKE (1.52 larvae/mrl). Beauveria bassiana 1.0 WP treated plots recorded higher population (1.1.64 larvae/mrl). The untreated plots recorded highest larval population (3.18 larvae/mrl) of gram pod borer. With regard to pod damage, flubendiamide 39.35SC was found best recording significantly minimum pod damage (8.32%) followed by indoxacarb 14.5EC (9.24%), emamectin benzoate 5SG (9.44%) cypermethrin25EC (10.70%), fipronil 5SC (11.42%), quinalphos 25EC (12.21%), cartap hydrochloride 50SP (12.75%), NPV (13.00%), NSKE (13.17%) and B.t. (13.48%) . Among the treatments the Beauveria bassiana 1.0 WP recorded highest pod damage (13.90%). The untreated plots recorded highest pod damage (21.33%). Flubendiamide 39.35SC recorded significantly highest yield (1789 kg/ha). followed by indoxacarb 14.5EC (1700 kg/ha), emamectin benzoate (1689 kg/ha) cypermethrin 25EC (1501 kg/ha), fipronil 5SC (1473 kg/ha), quinalphos 25EC (1470 kg/ha), cartap hydrochloride 50SP (1395 kg/ha), NPV(1355 kg/ha), B.t. (1294 kg/ha) and NSKE (1283 kg/ha). Among the treatments the Beauveria bassiana 1.0 WP was recorded lowest yield (1278 kg/ha). The untreated plots recorded lowest yield of (1078 kg/ha). Treatment flubendiamide 39.35SC gave maximum net profit (19852 Rs/ha) among all the treatments followed by emamectin benzoate 5SG (17252 Rs/ha), whereas Incremental cost benefit ratio was maximum with the treatment of cypermethrin 25EC (1:9.40). The minimum net profit and Incremental cost benefit ratio was recorded in the treatment of Beauveria bassiana 1.0 WP (3100 Rs/ha and 1:1.94), respectively.