Egg and larval population of Helicoverpa armigera in ipm modules in pigeonpea

2020 ◽  
Vol 82 (2) ◽  
pp. 268
Author(s):  
Amit Yadav ◽  
Ram Keval ◽  
Abhishek Yadav
Keyword(s):  
Helicoverpa Armigera ◽  
Larval Population ◽  
Helicoverpa Armígera

Field Efficiency of Certain Biopesticides and Neem Products Against Helicoverpa armigera (Hubner) on Chickpea (Cicer arietinumL.)

2019 ◽  
Vol 10 (01) ◽  
Author(s):  
Nihad H. Mutlag ◽  
Ameer S. A. Al-Haddad
Keyword(s):  
Helicoverpa Armigera ◽  
Block Design ◽  
Individual Treatment ◽  
Neem Oil ◽  
Larval Population ◽  
Neem Cake ◽  
Combination Treatments ◽  
Randomized Block Design ◽  
Helicoverpa Armígera ◽  
Nuclear Polyhedrosis

A field study was conducted to evaluate the efficiency of four microbial insecticides viz. Beauveria bassiana; HaNPV (Helicoverpa armigera Nuclear Polyhedrosis virus); (Bacillus thuringiensisvar.kurstaki 2 gm/L); HaNPV+Bt; neem oil; neem cake and D.D.V.P EC 76% @0.05% at Research Farm SHIATS,Allahabad during rabi season of 2011-2012. The experiment was laid out in randomized block design with seven treatment and replicated thrice. The observation larval populations of H. armigera were recorded one day before treatment was recorded at 3,7, and 10 days after treatments. The larva population of H. armigera appeared in the third week of February (8 the Standard week) and reached its peak of 14.65 larvae in first week of April and decline rapidly with maturation of crop. There was only one peak in the larval population observation in the 1st week. Bacillus thuringiensis was the most effective chemical by D.D.V.P.76%@0.05% . Among the microbial insecticides. HaNPV ,was the most effective followed by HaNPV+Bt and neem cake . The combination treatments were less effective than the individual treatment neem oil and B. bassiana were the least effective treatment in reducing the larval population of Heliverpa armigera.

scholarly journals Field efficacy of Helicoverpa armigera nucleopolyhedro-virus isolates against H. armigera (Hübner) (Lepidoptera: Noctuidae) on cotton and chickpea in Tamil Nadu

2010 ◽  
Vol 46 (No. 3) ◽  
pp. 116-122 ◽  
Author(s):  
S. Jeyarani ◽  
N. Sathiah ◽  
P. Karuppuchamy
Keyword(s):  
Helicoverpa Armigera ◽  
Tamil Nadu ◽  
Cost Benefit ◽  
Larval Population ◽  
Coimbatore District ◽  
Field Efficacy ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae ◽  
Virus Isolates ◽  
Insecticide Control

Field efficacy of seven geographical isolates of Helicoverpa armigera nucleopolyhedrovirus (HaNPV) along with an insecticide control was evaluated against H. armigera on cotton and chickpea in the Coimbatore district of Tamil Nadu, India. Among the HaNPV isolates, CBE I (Coimbatore) and NEG (Negamum) applied at 3.0 &times; 10<sup>12</sup> POB/ha to cotton and 1.5 &times; 10<sup>12</sup> POB/ha to chickpea with an adjuvant, crude sugar, significantly reduced the H. armigera larval population and increased the yield. CBE I and NEG recorded the highest yield of 2038 kg/ha and 2033 kg/ha, which was on a par with endosulfan (2026.7 kg/ha) with cost/benefit ratios of 1:2.32, 1:2.48, and 1:1.12, respectively, on cotton. In chickpea grain yields of 980, 983, and 973.3 kg/ha and cost/benefit ratios of 1:1.36, 1:1.48 and 1:0.87, respectively, in CBE I, NEG and endosulfan treated plots were obtained. The isolate RAJ (Rajasthan) recorded the lowest yield comparable to that of the untreated control in both crops.

Evaluation of biopesticides against gram pod borer Helicoverpa armigera (HUB.) on pigeonpea

2016 ◽  
Author(s):  
Sagar Anand Pandey ◽  
S. B. Das
Keyword(s):  
Field Experiment ◽  
Grain Yield ◽  
Helicoverpa Armigera ◽  
Block Design ◽  
Pigeon Pea ◽  
Larval Population ◽  
Randomized Block Design ◽  
Pod Borer ◽  
Helicoverpa Armígera ◽  
Major Pest

A field experiment on evaluation of biopesticides against gram pod borer (Helicoverpa armigera Hub.) on pigeon pea was carried out during kharif season of 2012-13. The experiment was laid out in randomized block design with three replications. Gram pod borer is a major pest of pigeon pea in India. For the management of this pest seven biopesticides were tested along with control. Among the biopesticides, Beauveria bassiana @ 1 liter / ha (1x1012 spores/ml) was found to be most effective biopesticide as it recorded lowest larval population (6.68 larvae / 5plants). The highest larval population was recorded in control (12.61 larvae /5 plants). The least effective treatment was Paecilomyces fumosoreseus (9.31 larvae /5 plants). Similar trend was observed in the grain yield as 1667.55 kg/ha, 709.41kg/ha and 1025.21kg/ha , respectively.

scholarly journals Standardization of Pheromone Traps for the Mass Trapping of Helicoverpa Armigera (Hubner) Hardwick in Tomato

2017 ◽  
Vol 5 (1) ◽  
pp. 45-49
Author(s):  
K. D Shah ◽  
R. C Jhala ◽  
S. R Dhandge
Keyword(s):  
Helicoverpa Armigera ◽  
First Year ◽  
Mass Trapping ◽  
Pheromone Traps ◽  
Larval Population ◽  
Randomized Design ◽  
Helicoverpa Armígera ◽  
Large Plot ◽  
And Control ◽  
Helicoverpa Armigera Hubner

An experiment was carried out during rabi 2011 and summer 2012 in Large Plot Completely Randomized Design with four treatments viz., pheromone traps @ 30, 40, 50 /ha and control withten replications to standardize the requirement of pheromone traps for mass trapping of Helicoverpa armigera (Hubner) Hardwick infesting tomato [Solanum lycopersicum Linnaeus] crop. The results revealed that the highest moth catches were recorded (9630 moths /ha) during first year, while 9405moths /ha were recorded during second year with an average of 9518 /ha during two consecutive years. The treatment of 50 traps /ha recorded significantly lowest population of eggs (0.78 /10 twigs), lowest larval population (1.32 /10 twigs) resulting in lowest fruit damage (3.71%).

scholarly journals Influence of prevailing weather parameters on population dynamics of fruit borer, Helicoverpa armigera (Hübner) on tomato in Haryana

2021 ◽  
Vol 21 (2) ◽  
pp. 193-196
Author(s):  
SHIVANI KHOKHAR ◽  
KRISHNA ROLANIA ◽  
GAURAV SINGH ◽  
ANIL KUMAR
Keyword(s):  
Relative Humidity ◽  
Helicoverpa Armigera ◽  
Significant Positive Correlation ◽  
Linear Regression Analysis ◽  
Maximum Temperature ◽  
Population Fluctuations ◽  
Larval Population ◽  
Positive Correlation ◽  
Helicoverpa Armígera ◽  
Weather Parameters

A field experiment was conducted for two years (2016-17 and 2017-18) at Entomological Research Area, Department of Entomology, CCS Haryana Agricultural University, Hisar to ascertain the influence of various meteorological parameters on population fluctuations of Helicoverpa armigera on tomato. The maximum oviposition (4.60 eggs/ plant) was recorded during 15th standard meteorologicalweek (SMW) whereas larval population was at peak (4.91 larvae/ plant) during 16th SMW. The larval population showed significant positive correlation with maximum temperature (r=0.617*) and highly significant negative correlation with morning (r=-0.784**) as well as evening relative humidity (r=-0.814**). Maximum eggs parasitization (12.85 %) by Trichogramma sp. was recorded during 16th SMW. These trichogrammatid parasitoids exhibited non-significant correlation with weather parameters and highly significant positive correlation (r=0.976**) with egg counts of H. armigera. Multiple linear regression analysis showed that 77 per cent (R2=0.77) variability in larval population was accounted by weather parameters particularly maximum temperature, morning and evening relative humidity. 

scholarly journals Prediction of Helicoverpa armigera (Hubner) larval population using weather based forewarning model in soybean

2021 ◽  
Vol 21 (4) ◽  
pp. 494-498
Author(s):  
RAM MANOHAR PATEL ◽  
A.N. Sharma ◽  
PURUSHOTTAM SHARMA
Keyword(s):  
Helicoverpa Armigera ◽  
Training Dataset ◽  
Maximum Temperature ◽  
Validation Dataset ◽  
Larval Population ◽  
Pod Borer ◽  
Significant Difference ◽  
Helicoverpa Armígera ◽  
Predicted Values ◽  
Helicoverpa Armigera Hubner

Weekly larval populations of pod borer, Helicoverpa armigera (Hubner) collected from 20 districts of Maharashtra under Crop Pest Surveillance and Advisory Project (CROPSAP) during 2010-2015 were analyzed to work out the effect of weather variables on the incidence of this insect on soybean. The appearance of larva was observed throughout the soybean growing season, and the peak incidence was observed during third week of August to first week of September (34-35 SMW). The correlation analysis of the data revealed that larval population was significantly and positively influenced by the minimum temperature and rainfall of current week as well as previous two weeks. For the development of forewarning model, data for the period from 2010 to 2013 were used as training dataset and two year (2014-2015) data as validation dataset. The mean model used for forewarning the incidence of pod borer larval population was developed by using step-wise multiple regression analysis in polynomial form. The results of mean model revealed that the significant variables affecting the pod borer larval population in soybean were maximum temperature (current and 1st lag week), and rainfall (current week) and the model explained 48.93% variation. The pre-disposing conditions for the incidence of larvae have been worked out as maximum temperature ranging from 26.1 to 31.47 ºC and rainfall ranging from 6.63 to 141.46 mm with low or medium rainfall in previous weeks followed by high in current week. The model was validated with 2014-15 independent dataset with predicted R2 (R2 ) value 28.13%. Two sample t-test showed no Pred significant difference between observed and predicted values (p = 0.3691 > 0.05).

scholarly journals Impact of Light Traps on the Larval Population of Gram Pod Borer, Helicoverpa armigera (Lepidoptera: Noctuidae) on Chickpea

2020 ◽  
pp. 107-111
Author(s):  
S. A. Hakeem ◽  
F. Rasool ◽  
S. Bashir ◽  
S. Nissa ◽  
Z. A. Dar ◽  
...  
Keyword(s):  
Population Density ◽  
Light Source ◽  
Helicoverpa Armigera ◽  
Light Traps ◽  
Average Yield ◽  
Larval Population ◽  
Pooled Data ◽  
Pod Borer ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae

One (T1) and two (T2) light traps per ha were compared with control with no light source (T3) against gram pod borer, Helicoverpa armigera. Pooled data of 2018 and 2019  showed that TI resulted with average population of 0.31larvae per plant with 5.46% pod damage and average yield of 1235 kg per ha. In T2, lowest larval population was recorded (0.25/plant), lesser pod damage (4.02%) and higher yield (1244.8 kg /ha) while in control plots (T3), larval population density was maximum with 0.377 larvae/plant with pod damage of 10-25% and 1162.90 kg /ha yield was recorded.

Screening of some chickpea (Cicer arietinum L.) varieties against Helicoverpa armigera under semi arid climatic conditions

2016 ◽  
Author(s):  
Shafiq Ur Rehman ◽  
Muhammad Waqar Hassan ◽  
Moazzam Jamil ◽  
Muhammad Akram
Keyword(s):  
Cicer Arietinum ◽  
Helicoverpa Armigera ◽  
Block Design ◽  
Climatic Conditions ◽  
Pest Population ◽  
Weather Factors ◽  
Larval Population ◽  
Cicer Arietinum L ◽  
Helicoverpa Armígera ◽  
Semi Arid

Nine desi chickpea (Cicer arietinum L.) varieties viz., Balkasar-2000, Bhakhar-2011, Bittal-98, Brc-61, Brc-390, Punjab-2000, Punjab-2008, Thall-2006 and 03009 were sown at experimental area of Islamia University of Bahawalpur in randomized complete block design (RCBD) with three replications each during 2014-2015. 03009 had highest mean larval population of Helicoverpa armigera followed by Bittal-98, Thall-2006 and Bhakhar-2011. Punjab-2000, BRC-390 and BRC 61 exhibited moderate larval population. The least larval population was observed in Punjab-2008 and Balkasar-2000. Maximum per cent pod damage was observed in Bittal-98 (28.29) followed by 03009 (26.57), Bhakhar-2011 (25.47), Thall-2006 (24.27), Punjab-2000 (22.81), BRC-390 (21.70), BRC-61 (20.53), Balkasar-2000 (18.30) and Punjab-2008 (16.73). Highest yield of crop was observed in Punjab-2008 (516.35gplot-1) followed by Balkasar-2000 (483.38), BRC-61 (415.15), BRC-390 (380.03), Punjab-2000 (345.34), Bittal-98 (303.50), Bhakhar-2011 (298.43), Thall-2006 (293.55) and 03009 (209.99) g/plot. It was also observed that larval population of H. armigera increased or decreased with weather factors. Thus varieties showing more pest population yielded less and those with less pest population generated more yield of chickpea. These results can be employed for integrated pest management of H. armigera on chickpea in different semi arid climatic conditions.

scholarly journals Comparative Efficacy of Bio-Pesticide And Synthetic Agrochemicals on Control Of Helicoverpa Armigera Larvae On Chickpea

2018 ◽  
Vol 9 (2) ◽  
pp. 75-81
Author(s):  
Taimur Ahmad ◽  
Rasool Khan ◽  
Tariq Nawaz Khattak ◽  
Ayaz Khan ◽  
Ihsan Ullah
Keyword(s):  
Helicoverpa Armigera ◽  
Comparative Efficacy ◽  
Larval Population ◽  
Pod Borer ◽  
Helicoverpa Armígera

An experiment was conducted for the year 2016-17 to compare the efficacy of neem bio-pesticide and synthetic agrochemicals on the control of larvae of Helicoverpa Armigera. The experiment consisted of a total of six treatments including control. There were a total of six treatments of the pesticides including control with four replicates and two application of the pesticides. The results indicate that the synthetic emamactin (T1) was the superior in controlling the larval population of pod borer with a % reduction of 63 and 88 after 1st and 2nd application. The chloropyifos showed better results next to emamactin 2nd spray. The neem bio-pesticide showed best results next to emamctin after the first application. The acetamiprid showed the least efficacy in control of pod borer larvae than all other treatments of pesticides.

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