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Edward George, P. J.

• Comparative Predatory Efficiency of Acanthaspis pedestris Stal (Hemiptera:Reduviidae) on Two Cotton Pests

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Authors

P. J. Edward George ¹

Affiliations
1 Entomology Research Unit, St. Xavier's College, Palayankottai 627002, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 18, No 2 (2004), Pagination: 155-159

Abstract

The comparative predatory efficiency of Acanthaspis pedestris Sta1 a major reduviid predator of many insect pests in South India was assessed on two cotton pests, Helicoverpa armigera (Hubner) and Spodoptera litura Fabricius. Gradual increase in prey consUInption was recorded by the progression of the developmental stages of the predator. The adult female consumed more than the male. The consumption of predators was found to be decreased with the advancement of prey stages. First and second instar A. pedestris were limited in their ability to capture large sized prey in both the prey species. Among the two prey species, S. litura was the most preferred prey.

Keywords

Acantiraspis pedestris, Helicoverpa armigera, Nymphal Instal's, Predatory Efficiency, S. litura.

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• Nutritional Influence of Prey on the Biology and Biochemistry in Rhynocoris marginatus (Fabricius) (Heteroptera:Reduviidae)

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Authors

P. J. Edward George ¹, J. Kannagi ¹, D. P. Ambrose ¹

Affiliations
1 Entomology Research Unit, St. Xavier's College, Palayankottai 627 002, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 16, No 1 (2002), Pagination: 1-4

Abstract

Nutritional influence of three prey species namely Spodoptera litura (Fabricius), Raphidopalpa foveicollis Lucas and Chrotogonus sp. on the biology and biochemistry of Rhynocoris marginatus (Fabricius) was examined in the laboratory at 30±2°C, 75-80 percent relative humidity and 11-13h photoperiod. Newly emerged nymphs were reared singly on the three prey species separately and followed through all life stages until the predator died. Developmental period of nymphs was longer on R. Foevicollis (100.08±9.06  days) than on Chrotogonus sp. (85.52± 10.14 days) and minimum developmental period was recorded on S.litura (69.36±6.75 days). Maximum fecundity and longevity was recorded on S. Litura fed category. The biochemical constituents such as carbohydrates, proteins and lipids were also higher in S.litura fed R. marginatus.

Keywords

Biochemical Constituents, Biology, Prey Influence, Rhynocoris marginatus.

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• Polymorphic Adaptation in Biology and Life-Table Studies of Rhynocoris marginatus (fabricius) OnEarias vittella (fabricius)

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Authors

P. J. Edward George ¹

Affiliations
1 Entomology Research Unit, St. Xavier's College Palayankottai 627002, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 14, No 2 (2000), Pagination: 35-39

Abstract

Life tables of three morphs of Rhynocoris marginatus (Fabricius) (niger. nigrosanguineous and sanguineous) on the spotted bollworm Earias vittella (Fabricius) were constructed in the laboratory. Maximum fecundity and longevity were observed in niger morph followed by nigrosanguineous and sanguineous morphs. The intrinsic rates of natural increase were 0.034, 0.028 and 0.026 per female per day for niger, nigrosanguineous and sanguineous morphs, respectively. The population multiplication of the niger morph was comparatively higher than that of nigrosanguineous and sanguineous morphs in the cohort generation time. The life expectancy (e_x) of newly laid eggs decreased with increasing age in all the morphs.

Keywords

Development, Life Tables, Morphs, Rhynocoris marginatus.

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• Nymphal Cannibalistic Behaviour of Rhynocoris kumarii Ambrose and Livingstone (Heteropreta: Reduviidae) to Prey Deprivation and Mass Rearing Conditions

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Authors

P. J. Edward George ¹

Affiliations
1 Entomology Research Unit, St. Xavier's College Palayamkottai 627 002, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 14, No 1 (2000), Pagination: 1-3

Abstract

Rhynocoris kumarii Ambrose and Livingstone was reared in groups in containers of two different sizes and also starved for 0, 2,4 and 6 days to understand the cannibalistic behaviour of the different nymphal stages. Cannibalism increased when space was limited or in crowded condition. The rate of starvation has also marked influence on the cannibalistic activity. Maximum cannibalism was observed in the first and second nymphal ins tars. Cannibalism was very less in the third and fourth nymphal instars.

Keywords

Cannibalism, Nymphs, Rhynocoris kumarii, Starvation.

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• Biology and Life Table of Rhynocoris marginatus (Fabricius) (Heteroptera:Reduviidae) on Three Lepidopteran Insect Pests

Abstract Views :259  |  PDF Views:145

Authors

P. J. Edward George ¹

Affiliations
1 Entomology Research Unit, St. Xavier's College, Palayamkottai 627 002, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 13, No 1&2 (1999), Pagination: 33-38

Abstract

Fecundity and adult longevity of both the sexes in Rhynocoris marginatus (Fabricius) were maximal while total developmental period was minimal when this reduviid predator was reared on larvae of Spodoptera litura (Fabricius) in place of Earias vittella (Boisduval) or Corcyra cephalonica (Stainton). Its intrinsic rate of increase and net reproductive potential were of the highest order if the predator always fed on caterpillars of S. litura.

Keywords

Corcyra cephalonica, Earias vittella, Life Table, Predator, Prey Influence, Rhynocoris marginatus, Spodoptera litura.

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• Life Table and Intrinsic Rate of Increase of Sycanus collaris Fabricius (Heteroptera:Reduviidae), a Predator of Spodoptera litura (Fabricius) (Lepidoptera:Noctuidae)

Abstract Views :235  |  PDF Views:136

Authors

P. J. Edward George ¹, R. Seenivasagan ², G. Karuppasamy ²

Affiliations
1 Entomology Research Unit, St.Xavier's College, Palayankottai 627 002, Tamil Nadu, IN
2 Entomology Research Institute, Loyola College, Chennai 600 034, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 12, No 2 (1998), Pagination: 107-111

Abstract

The life table studies on Sycancus collaris Fabricius (Heteroptera: Reduviidae) under laboratory conditions revealed that the net reproductive rate (R₀) of the species was 30.46 female eggs/female. The true intrinsic rate of natural increase (r_m) was 0.066. The population multiplied 1.59 times every week and the time taken for the doubling of predator was 10.56 days. The total nymphal duration was 49.3±1.95 days. The life span of females was more (45.17±1.83 days) than males (31.83±2.48 days).

Keywords

Development, Intrinsic Rate of Increase, Life Table, Netreproductive Rate, Spodoptera litura, Sycanus collaris.

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• Effect of Insecticides on the Post-Embryonic Development in Rhynocoris marginatus (Fabricius) (Heteroptera:Reduviidae)

Abstract Views :226  |  PDF Views:140

Authors

P. J. Edward George ¹, Dunston P. Ambrose ¹

Affiliations
1 Entomology Research Unit, St. Xavier's College, Palayankottai 627 002, IN

Source

Journal of Biological Control, Vol 12, No 2 (1998), Pagination: 113-118

Abstract

The effect of sub-lethal concentrations of monocrotophos, dimethoate, methyl parathion, quinalphos and endosulfan in the post-embryonic developmental characteristics viz. stadial period, body weight, fecundity and longevity of Rhynocoris marginatus (Fabricius) was studied. All the insecticides except endosulfan increased stadial period, decreased body weight, fecundity and longevity.

Keywords

Insecticides, Post-Embryonic Development, Rhynocoris marginatus, Sub-Lethal Concentration.

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• Biology and Life Table Studies of Acanthaspis pedestris Stal (Heteroptera:Reduviidae) Population on Three Lepidopteran Insect Pest

Abstract Views :220  |  PDF Views:102

Authors

P. J. Edward George ¹, R. Seenivasagan ², S. Kannan ²

Affiliations
1 Entomology Research Unit, St.Xavier's College, Palayankottai 627 002,Tamil Nadu, IN
2 Entomology Research Institute, Loyola College, Chennai 600034, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 12, No 1 (1998), Pagination: 1-6

Abstract

The life table and intrinsic rate of increase of Acanthaspis pedestris Stal (Heteroptera: Reduviidae) a predator of lepidopteran insect pests viz., Spodoptera litura (Fabricius), Earias vittella (Fabricius) and Corcyra cephalonica (Stainton) are discussed. The intrinsic rates of increase were 0.039, 0.032 and 0.028 per female per day on S. litura, E. vittella and C. cephalonica, respectively. The population multiplied 44.44, 24.79 and 19.36 times in the cohort generation time of 115.19,121.82 and 133.19 days on S. litura, E. vittella and C. cephalonica, respectively.

Keywords

Acanthaspis pedestris, Corcyra cephalonica, Earias vittella, Intrinsic Rate of Increase, Life Table, Spodoptera litura.

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• Predatory Efficiency of Rhynocoris marginatus (Fabricius) (Heteroptera: Reduviidae) on Helicoverpa armigera (Hiibner) and Spodoptera litura (Fabricius)

Abstract Views :231  |  PDF Views:126

Authors

P. J. Edward George ¹, R. Seenivasagan ²

Affiliations
1 Entomology Research Unit, St. Xavier's College, Palayamkottai 627 002, Tamil Nadu, IN
2 Entomology Research Institute, Loyola College, Chennai 600034, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 12, No 1 (1998), Pagination: 25-29

Abstract

Comparative predatory efficiency of Rhynocoris marginatus (Fabricius) was assessed on two cotton pests namely, Helicoverpa armigera (Hubner) and Spodoptera litura (Fabricius). Gradual increase in prey consumption was recorded by the progression of the developmental stages of the predator. Adult females consumed more than males and consumption decreased with the later prey instars. Among the two prey species, S. litura was more preferred.

Keywords

Helicoverpa armigera, Predatory efficiency, Rhynocoris marginatus, Spodoptera litura.

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