WEL COME

OUTLINE OF POST – GRADUATE RESEARCH PROPOSAL ON

Population dynamics and management of Helicoverpa armigera infesting Chickpea under

Middle Gujarat condition

UNDER THE GUIDANCE OFDr. H. P. Patel

Training Associate (Plant Protection)Training & Visit Scheme AAU, Anand-388110

SUBMITTED BYPatil Rajesh Sitaram

B. Sc. (Agri.)B.A.C.A., A.AU, Anand.

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1. Introduction

Chickpea (Cicer arietinum L.) commonly known as Bengal gram and locally as Chana and ‘Gram,’ is an important food legume crop. It has been traditionally recognized as an indispensable constituent of Indian diet. The pulses are rich in protein (20 to 25%) and several essential amino acids.

In the world, chickpea is cultivated in about 10.4 million hectares and producing 8.57 million tones of seeds with a productivity of 824 kg ha-1. As many as 45 countries, including India, growing chickpea, but dozen of countries together contribute 96 per cent to the global production. India grows chickpea on about 7.58 million hectares of land and producing 6.91 million tones of seeds with a productivity of 780 kg ha-1, which represent 31.7 per cent and 45.70 percent of the national pulse acreage and production, respectively (Anon., 2007).

Major chickpea producing states in India are Madhya Pradesh, Uttar Pradesh, Maharashtra, Andhra Pradesh, Rajasthan, Gujarat and Karnataka which together contribute 93 per cent of the production from 92 per cent of area (Ali and Kumar, 2005).

In Gujarat, chickpea is cultivated in about 2,14,800 hectares of land, producing 0.21 million tones of seeds with a productivity of 979 kg ha-1. The main chickpea growing districts in Gujarat state are Dahod, Jamnagar, Ahmadabad, Porbandar, Surat, Kheda and Surendranagar. In Anand district, chickpea is grown in about 86,100 hectares of land and producing 2,00,300 tones of seeds with 2327 kg ha-1 productivity (Anon., 2008).

The damage caused by insect pests is one of the main constraints which limit the production of chickpea. Pod borer, Helicoverpa armigera (Hubner) Hardwick is predominant species causing economic damage to chickpea crop. The yield loss in chickpea due to pod borer was reported as 10 to 60 per cent in normal weather conditions (Vaishampayan and Veda, 1980),

while it was 50 to 100 per cent in favorable weather conditions, particularly in the state where frequent rain and cloudy weather is prevailing during the crop season (Patel, 1979).

A little information is available on population dynamics through pheromone traps, varietal screening and bio-efficacy of different botanical insecticides for the management of gram pod borer, H. armigera. Therefore, the studies on the insect pests of chickpea will be conducted with following objectives.

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2. Objectives

1.Population dynamics of H. armigera through pheromone trap.

2.Screening of promising genotypes of chick pea against H. armigera.

3.Eco-friendly management of H. armigera under field condition.

Objective:

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3. Review of Literature

3. BRIEF REVIEW OF WORK DONE: The available literatures related to present investigation is reviewed here under,

3.1 Population dynamics of H. armigera through pheromone trap.

Srivastava et al., (1991) reported that maximum moth catches were obtained in 14th and 15th standard week, i.e. during the first fortnight of April in northern part of Pakisthan.

Nakat and Ghorpade (1999) found that the activity of H. armigera was maximum (98 to 134 moths/3 traps/ week) during last week of December, 96 moths to third week of January and 97 moths in chickpea crop. They also observed that the highest activity of the pest during 39th and 40th standard meteorological week (STW) followed by peak during 43rd and 44th standard meteorological weeks.

Gupta et al., (2004) at Pantnagar in Uttar Pradesh studied population dynamics of H. armigera through pheromones traps in the fields of chickpea and sunflower using sex pheromones and reported that the major infestation of H. armigera was recorded in March and April with maximum moth catches of 70% during the last fortnight of March and first fortnight of April.

Hossain et al., (2008) monitored the chick pea pod borer and its activities throughout the year by installing pheromone traps at Pulses Research Center, Ishurdi, Pabna during January 2004 to December 2006 and observed that catching of moths was increased pheromone trap, screening of promising different genotypes and bio-efficacy of different botanicals and microbial insecticides against pod borer, H. armigera infesting chickpea. gradually and reached its peak in the month of April and then gradually decreased and diminished to zero in the last week of July. No catches were observed up to December.

As per the report of Kant and Kanaujia (2008), maximum moth (76.71 moths/trap) was recorded during 16th standard week where as larval population was 76.6 and 46.8 larva/10 plants during 14th standard week in high density area and low density area respectively. Further, they also reported highly significant correlation between moth catches by the pheromone traps and larval population infesting chickpea crop.

Reena et al., (2009) studied the influence of chickpea on natural enemies of gram pod borer, H. armigera and monitored the adult population through pheromone traps. The peak of catches was recorded during 14-15th STW.

3.2 Screening of promising genotypes of chick pea against H. armigera.

Bhatt and Patel (2001) evaluated chickpea cultivars against H.

armigera during Rabi 1998-1999, Among the eleven cultivars tested, the per cent pod damage was lower (9.55%) in Chaffa and highest (18.49%) in PG 81-1-1 while highest grain yield (1250 kg/ha) recorded in cultivar ICCC.

Rajput et al., (2003) evaluated eight genotypes against H. armigera under the field condition at NIA, Tandojam (Pakistan) and observed that genotype C-727 was relatively resistant against this pest as compared to other genotypes. Kaur et al., (2005) screened 184 genotypes of chickpea. Against H. armigera and lowest pod damage (30.87%) was recorded in genotype IPC 96-3 and proved to be leaf susceptible where as, genotype C-727 proved to be highly susceptible as it recorded the highest (70.65%) pod damage

Shahzad et al., (2005) among the 12 chickpea genotypes, the minimum pod damage due to H. armigera was observed in genotype Pb-91 and proved to be tolerant. Genotype Hassan-2k found highly susceptible and recorded the highest (92.2%) pod damage.

Patil et al., (2007) evaluated twenty five genotypes of chickpea against H. armigera at the International Chickpea Helicoverpa Resistant Nursery (ICHRN), M.P.K.V. Rahuri and reported that the highest (14.90%) pod damage was recorded in genotype RIL 7 and genotype ICC 16374 categorized as resistance/tolerance against H. armigera with minimum pod damage (5.05%).

Deshmukh et al., (2010) screened fifteen genotypes/cultivars of chickpea against H. armigera, BG-372, HC-1, SAKI-9516, Vijay and Avrodhi were found comparatively less susceptible as they harboured lower larval population (1.07 to 1.32 larvae/plant), also had lower damage to pods (11.41 to 14.16%) and higher grain yield (1375 kg/ha to 1187 kg/ha) than remaining cultivars. Further, the cultivars, Dahod Yellow and BG-256 were also less susceptible and gave good grain yield even though having high larval population (2.52 and 2.47 larvae/plant) and high pod damage (22.81 and 20.49%).

3.3 Efficacy of botanical insecticides against H. armigera under field condition.

Singh et al., (1985) observed that percentage pod damage due to H. armigera was much less in pigeonpea plot treated with Ethanolic extract neem seed kernel (2%).Sarode et al., (1995) revealed that all the HNPV and NSKE combinations performed better than single sprays of each. The application of HNPV 500 LE ha-1 + NSKE 6% recorded maximum larval reduction of 79.8 and 65.2% at 7 and 14 days after spraying, respectively. also recorded significantly the highest yield of (1770 kg ha-1 ).Kumar and Prasad (2002) recorded the highest larval reduction (75.25 to 100 %) of H.armigera in chickpea plot treated with lufenuron + Profenophos @ 600 ml/ha at the time of 50% flowering /pod initiation.

Yadav et al., (2004) Among various treatments, chickpea plots treated with Delfin WG @ 1 kg ha-1 recorded minimum number of H. armigera larvae followed by HaNPV, Achook, and endosulfan with significant increase in yield over control.

Visalakshimi et al., (2005) reported that application of neem effectively reduced the oviposition of H.armigera throughout the crop period. Among various IPM components (neem 0.06%, HaNPV 250 L/ha, bird perches one/plot, endosulfan 0.07%), neem and HaNPV found as effective as endosulfan in the terms of reduction larval population and pod damage, further, endosulfan comparatively found toxic to natural enemies present in chickpea eco-system.

Reddy et al., (2010) studied the efficacy of common insecticides viz., neem seed kernel extract (NSKE), HaNPV, Endosulfan were tested alone and in combination against gram pod borer, H. armigra in chickpea. Result showed that larval reduction was highest with NSKE 1.66% + HaNPV 250LE/ha + Endosulfan 0.023% followed by NSKE 1.66% + Endosulfan 0.023%, NSKE 2.5% + HaNPV 250LE sprayed twice at 15 days interval, respectivly.

Prasad et al., (2010) The present study is an attempt to control the pest population of H. armigera with an ecosafe entomopathogen Beauveria bassiana (Balsamo) When four different concentrations (0.1,0.125, 0.2 and 0.25ml x108 spores/ml) were sprayed topically against most damaging IVth instar larvae of H. armigera, a dose dependent mortality was observed that went up to 76.7 percent with highest dose of 0.25ml x108 spores/ml. Dunett test revealed percent mortality significant at 1 and 5 percent level with different doses.

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4. Methodology

1. Population dynamics of H.armigera through pheromone trap.

Experimental details:

1.Location : Agronomy farm, B.A.C.A, A.A.U., Anand

2.Year of commencement : Rabi, 2010-20113.Crop and Variety : Chickpea, GG-14.Spacing : 30 x 10 cm5.Plot size : 20 x 20 sq.m.

Observations to be recorded:1) Moths/trap/week2) Population of H. armigera (eggs and larvae)3) Pod damage

Methodology

A field experiment will be conducted at college Agronomy farm. Chickpea crop will be sown in Rabi 2010 and raised by adopting standard agronomical practices in large plot (20 x 20 m2). Experimental plot will be kept free from insecticidal spray. Pheromone trap will be installed with the height of 0.5 m above ground level. Rubber dispenser septa will be changed every 3 weeks to maintain catch efficacy of trap. A small amount of insecticide dust will be sprinkled in the polythene sleeve to kill the moths trapped in it. The male moths trapped in the polythene sleeve traps will be counted in a week throughout the crop season. The population of eggs and larvae will also be recorded at weekly interval. For the purposes 20 plants will be selected randomly and number of egg(s) as well as larva(e) will be recorded per plant. The data on moth catches will also be correlated with the abiotic factors to see any impact on the population of H.armigera .

2. Screening of promising genotypes of chick pea against H. armigera.Details of Experiment1) Location

: Agronomy farm, B.A.C.A, A.A.U., Anand2) Crop

: Chickpea 3) Year of commencement

: 2010-114) Design

: Randomized Block Design 5) Treatments

: 10 (genotypes)6)Replications

: Four (4)

Sr .No. Genotypes Sr. No. Genotypes

1. GJG-0834 6. GJG-0714

2. GJG-820 7. GJG-0723

3. GJG-804 8. GJG-026

4. GJG-0315 9. GJG-840

5. GAG-0515 10. GG-1(C)

7) Plot size : Gross : 2.4 × 4.0 m Net: 1.8 × 3.8 m8) Spacing : 30 × 10 cm

Genotypes: Received from Pulse Research Station, AAU, Derol

Observations to be recorded: 1) Number of egg(s) and larva(e) per plant/weak2) Pod damage at green pod and at harvest stage3) Grain yield (kg/plot).

Methodology:A field experiment for screening of different genotypes along with one

susceptible check (GG-1) will be conducted at college Agronomy farm. Different genotypes of gram will be sown in Rabi 2010 and raised by adopting standard agronomical practices. Experimental plot will be kept free from insecticidal spray. For recording observations, 10 plants will be selected randomly from each plot and number of egg(s) and larva(e) will be recorded. In order to record the pod damage at green pod stage and at harvesting stage, 100 pods will be selected randomly from each plot area and plucked them. These pods will be brought to the laboratory. Pods will be sorted out into healthy and damaged pods due to H. armigera and per cent pod damage will be worked out. The gram genotypes will be categorized into different categories of resistance as described by Patel et al. (2002).

3.Eco-friendly management of H. armigera under field condition

Details of Experiment:

1)Location : Agronomy farm, B.A.C.A., A.A.U., Anand 2) Crop and variety : Chickpea, GG-1 3) Year of commencement : 2010-11 4) Design : Randomized Block Design (RBD) 5) Treatments : 10 (Botanical and Microbial insecticides) 6) Replications : 4 7) Plot size : Gross : 2.4 × 4.0 m Net : 1.8 × 3.8 m 8) Spacing : 30 × 10 cm

Sr. No. Name of insecticide Conc.(%) & quantity (ml or gm/10 lit. of water)

T1 Neen oil (Azadirachta indica) 0.3% (30ml)

T2 Neem seed kernel extract (Azadirachta indica)

5% (50gm)

T3 Neem leaf extract (Azadirachta indica) 10% (100gm)

T4 Adulsa leaf extract (Adhatoda vasica) 10% (100gm)

T5 Garlic bulb extract (Allium sativum) 5% (50gm)

T6 Naffatia (Ipomoea fistulosa) 5% (50gm)

T7 Bacillus thuringiensis 0.750 kg/ha

T8 Beauveria bassiana 0.25 ml x 108

T9 HaNPV 250 LE/ha

T10 Control ___

Treatments

Observations to be recorded 1. Number of egg(s) and larva(e) per plant 2. Pod damage at green pod and at harvest stage 3. Seed yield (kg/plot)

MethodologyChickpea crop will be raised by following standard agronomic practices. Observations on number of egg(s) and larva(e) of H. armigera per plant will be recorded on 10 randomly selected plants from net plot area before first spray and 3, 5, 7 and 10 days after each spray application. Pod damage at green pod and harvesting stage will be recorded as per the methodology described in Point No.11.2. First spray application will be made on appearance of the pest or flowering on 50 per cent plants and second at pod setting on 50 per cent plants. For recoding parasitism in H. armigera 10 larvae of H. armigera will be collected from the each treatment replication-wise and brought to the laboratory. Individual larvae will be recorded till their adult stage to see the emergence of parasites if any.

Method of analysisStatistical analysis will be carried out by following standard procedure (Steel and Torrie, 1960) at the Department of Agril. Statistics, BACA, AAU, Anand.

Facilities needed as well as those available at the centreFacilities available in the Department of Entomology, B. A. College of Agriculture, AAU, Anand will be utilized for studying the various aspects.

Collaboration with other departmentsDepartment of Agricultural Statistics, B. A. College of Agriculture, AAU, Anand.Department of Agricultural Meteorology, B. A. College of Agriculture, AAU, Anand.Agronomy Farm, B. A. College of Agriculture, AAU, Anand.

Thank

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