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.

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.

Evaluation of new generation pesticides to control pod borer,Helicoverpa armigera (Hubner) infesting chickpea

2016 ◽  
Author(s):  
Lekha ◽  
O. P. Ameta ◽  
Hemant Swami
Keyword(s):  
Effective Treatment ◽  
Helicoverpa Armigera ◽  
Cost Benefit ◽  
Cost Effective ◽  
Larval Population ◽  
Pod Borer ◽  
Cost Effective Treatment ◽  
Cost Benefit Ratio ◽  
Helicoverpa Armígera ◽  
New Generation

A field study was conducted to evaluate the efficacy of five insecticides viz., Lambdacyhalothrin 5 EC, Novaluron 10 EC, Clothianidin 50 WDG, Indoxacarb 14.5 SC and Quinalphos 25 EC (standard check) against gram pod borer (Helicoverpa armigera H.) on chickpea (Cicer arietinum L.) variety Pratap Channa-1. Lambdacyhalothrin 5 EC gave the highest reduction in the larval population of pod borer and was found statically at par with Indoxacarb 14.5 SC. The next effective treatments were Clothianidin 50 WDG and Quinalphos 25 EC, However, Novaluron 10 EC @ 750ml/ha proved to be the least effective treatment as it resulted in lowest per cent reduction in the larval population. Highest cost benefit ratio of 1:2.10 was obtained from Lambdacyhalothrin 5 EC followed by Indoxacarb 14.5 SC (1: 1.65). The next cost effective treatment in terms of CBR was Quinalphos 25 EC (1:1.64), whereas, Novaluron 10 EC (1:1.15) and Clothianidin 50 WDG @ 500g/ha (1:0.66) could not show any conspicuous gain over cost.

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.

Incidence of Helicoverpa armigera (Lepidoptera: Noctuidae) and its natural enemies on smallholder crops in Kenya

1993 ◽  
Vol 83 (3) ◽  
pp. 321-328 ◽  
Author(s):  
H. van den Berg ◽  
M. J. W. Cock ◽  
G. I. Oduor ◽  
E. K. Onsongo
Keyword(s):  
Helicoverpa Armigera ◽  
Heliothis Armigera ◽  
Population Densities ◽  
Parasitoid Species ◽  
Larval Parasitoid ◽  
Total Percentage ◽  
Four Seasons ◽  
Helicoverpa Armígera ◽  
Lepidoptera Noctuidae ◽  
Experimental Plots

AbstractSmallholder crops (sunflower, maize, sorghum and cotton) were grown in experimental plots at seven sites, representing different agricultural zones of Kenya, over four seasons. Helicoverpa armigera (Hübner) (formerly Heliothis armigera) only occasionally achieved population densities sufficient to cause obvious damage to the crops, and was virtually absent from the coastal sites. At the inland sites, infestation and mortality levels varied greatly. Information is presented on the incidence of H. armigera, and the identity, distribution and frequency of its common parasitoids and (potential) predators, sampled in the experimental plots. Trichogrammatoidea spp., egg parasitoids, and Linnaemya longirostris (Macquart), a tachinid late-larval parasitoid, were the most common parasitoid species, but total percentage parasitism was rather low. Of the large complex of predators, only anthocorids and ants (predominantly Pheidole spp., Myrmicaria spp. and Camponotus spp.) were sufficiently common and widespread to be of importance in suppressing H. armigera. The abundance of predators fluctuated widely between sites, but anthocorids were most abundant at the western sites.

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