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Murali Baskaran, R. K.

• Biology and Predatory Potential of Aphidophagous Syrphids on Guava Aphid, Aphis gossypii Glover (Hemiptera: Aphididae)

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Authors

R. K. Murali Baskaran ¹, S. Sasikumar ¹, D. S. Rajavel ¹, K. Suresh ¹

Affiliations
1 Department of Agricultural Entomology, Agricultural College and Research Institute (TNAU), Madurai 625104, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 23, No 1 (2009), Pagination: 53-56

Abstract

The biology of four species of aphidophagous syrphids, namely, Paragus serratus (F.), Episyrphus balteatus (De Geer), Ischiodon scutellaris (F.) and Dideopsis aegrota (F.) was studied on guava aphid, Aphis gossypii Glover, during 2007-08 and all the four species successfully completed their life cycle on A. gossypii. P. serratus had the shortest life cycle on A. gossypii with a total developmental period of 20.7 ± 1.36 days, followed by E. balteatus (21.5 ± 1.17 days), I. scutellaris (21.8 ± 0.91 days) and D. aegrota (26.3 ± 1.08 days). The total larval period of P. serratus, I. scutellaris, E. balteatus and D. aegrota averaged 9.8 ± 0.82, 10.6 ± 0.43, 10.0 ± 0.56 and 11.2 ± 0.64 days, respectively. The pupal period, fecundity and longevity of the syrphids on A. gossypii were recorded. In order to complete the larval period, each larva of P. serratus, I. scutellaris, E. balteatus and D. aegrota required a total of 333.7 ± 59.12, 380.7 ± 75.85, 410.8 ± 87.60 and 472.5 ± 56.89 numbers of A. gossypii, respectively.

Keywords

Aphis gossypii, Biology, Dideopsis agerota, Episyrphus balteatus, Ischiodon scutellaris, Paragus serratus and Predatory Potential.

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References

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• In Vivo Screening of Optical Brighteners as UV Protectants and their Efficacy in Enhancing the Virulence of Madurai Isolate of NPV of Amsacta albistriga (Walker) (Lepidoptera:Arctiidae)

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Authors

R. K. Murali Baskaran ¹

Affiliations
1 Department of Agricultural Entomology, Agricultural College and Research Institute (TNAU), Madurai, Tamil Nadu 625104, IN

Source

Journal of Biological Control, Vol 21, No 1 (2007), Pagination: 169-174

Abstract

In vivo screening of eight optical brigliteners as UV protectants For Madurai isolate of NPV of Amsacta albistriga (Walker) revealed that Ranipal BVN and 2B provided excellent protection (> 80% original activity remaining). The retention of viral activity ranged From 90.8 to 97.6 percent and 83.4 to 95.4 percent in various concentrations from 0.1 to 1.0 percent for Ranipal BVN and 2B, respectively while it was only from 4.6 to 7.0 percent in UV irradiated NPV for 60 min. Addition of the best UV protectant, Ranipal BVN along with phagostimulants (molasses and crude sugar) and inorganic substances (boric acid and urea) enhanced the virulence of A. albistriga NPV by reducing LT₅₀ besides causing the highest mortality.

Keywords

Adjuvants, Amsacta albistriga, LT₅₀ NPV, OAR, Optical Brighteners.

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• Optimum Thermal Regimes for Adult Storage of Scylnnus coccivora Ayyar (Coleoptera: Coccinellidae)

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Authors

R. K. Murali Baskaran ¹, K. Suresh ¹

Affiliations
1 Department of Agricultural Entomology Agricultural College and Research Institute (TNAU) Madurai 625 104, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 20, No 2 (2006), Pagination: 135-139

Abstract

Adults of Scymnus coccivora Ayyar (Coleoptera: Coccinellidae) were stored in five different temperature regimes of 5, 10, 15, 20 and 29°C along with 50 per cent honey as adult food, and the percent survival and fecundity at weekly interval were recorded during September - October 2004 in the weather condition of 31.9 ± 2.2°C and 68.8 ± 7.1 per cent relative humidity at Insectary, Department of Agricultural Entomology, Agricultural College and Research Institute, Madurai. The adult survival was 81.7 and 31.7 per cent on 35th and 56th day after storage, respectively when stored at 15°C. Adults of S. cocciwJra drawn from 20°C continued to lay eggs for up to 49 days which were 28.4, 23.4, 18.O, 15.4, 12.7, 7.4 and 4.0 eggs/female on 7, 14, 21, 28,35, 42 and 49th day after storage, respectively. Temperature at 20 and 15°C were favourable for the storage of adults with survival for prolonged period while 5 and 10°C were detrimental to survival and fecundity.

Keywords

Fecundity, Longevity, Scymnus coccivora, Survival, Thermal Requirement.

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• Efficacy of Trichogramma chilonis Ishii in Combination with Biopesticides against Helicoverpa armigera (Hubner) in Rainfed Cotton Ecosystem

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Authors

N. Balakrishnan ¹, R. K. Murali Baskaran ², N. R. Mahadevan ²

Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
2 Department of Agricultural Entomology, Agricultural College and Research Institute (TNAU), Madurai 625 104, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 18, No 2 (2004), Pagination: 121-128

Abstract

A study was undertaken to observe the combined effects of Trichogramma chilonis with some biopesticides viz., HaNPV, Bacillus thuringiensis var. kurstaki (HaIt WP) and Beauveria bassiana (Bev Bas). Two releases of T. chilonis with two sprays of B.t.k. recorded less mean larval popUlation (O.33/plant). less damage on shed squares (42.78%), intact squares (9.12%), bolls (14.20%) and loculi (10.68%) and recorded higher yield (782 kg/ha). Two releases of T. chilonis with two sprays of HaNPV was the next best treatment regarding less mean larval popUlation and damage on fruiting parts. Application of B. bassiana alone and in conjunction with T. chilonis proved less effective compared to other treatments. Two releases of T. chilonis with one spray of B.t.k or HaNPV and T. chilonis alone performed moderately in reducing the larval population and damage on fruiting parts.

Keywords

Biopesticides, Efficacy, Helicoverpa armigera, Trichogramma chilonis.

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• Field Efficacy of Chrysoperza carnea (Stephens) in Combination with Biopesticides against Helicoverpa armigera(Hubner) on Cotton under Rainfed Condition

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Authors

N. Balakrishnan ¹, R. K. Murali Baskaran ², N. R. Mahadevan ²

Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, IN
2 Department of Agricultural Entomology, Agricultural College and Research Institute (TNAU), Madurai 625 104, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 18, No 2 (2004), Pagination: 147-153

Abstract

The present investigation was carried out to study the field efficacy of Chrysoperla carnea (Stephens) in combination with biopesticides against Helicoverpa armigera (Hiibner). The lowest mean larval population of H. armigera, minimum damage on shed squares, squares (intact), bolls and loculi and higher yield were recorded in two releases of C. carnea and two sprays of Bacillus thuringiensis var. kurstaki (B.t.k.) treated plots followed by C. cornea in conjunction with HaNPV and B.t.k alone treated plots. The field recovery of C. cornea, HaNPV infected, Bacillus thuringiensis var. kurstaki infected and Beauveria bassiana mycosed larvae was more in their respective alone treated plots. The incremental cost benefit ratio was obtained maximum in chlorpyriphos 20 EC alone (1: 3.66) followed by HaNPV alone (1: 3.S(), two releases of C. carnea with two sprays of HaNPV (1: 2.88) and two releases of C. carnea with one spray of HaNPV (1: 2.48).

Keywords

Biopeslicides, Chrysoperia carnea, Cotton, Helicoverpa armigera, ICBR.

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• Influence of Intercropping on the Conservation of Chrysoperla carnea (Stephens) in Cotton

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Authors

V. R. Swaminathan ¹, R. K. Murali Baskaran ¹, N. R. Mahadevan ¹

Affiliations
1 Department of Agricultural Entomology, Agricultural College and Research Institute (TNAU), Madurai 625 104, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 13, No 1&2 (1999), Pagination: 111-114

Abstract

Among six intercrops evaluated, cotton (Gossypium hirsutum L.) intercropped with sunflower and cowpea in paired row system were favourable for the conservation of Chrysoperla carnea (Stephens), Cotton alone was comparatively less favourable to the multiplication of C. carnea, which correspondingly recorded more population of insect pests. The population of C. carnea did not show any influence on the population of Amrasca devastans Ishida.

Keywords

Chrysoperla carnea, Helicoverpa armigera, Intercropping System, Sucking Pests.

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• Optical Brighteners as UV Protectants and their Influence on the Virulence of Nuclear Polyhedrosis Virus of Spodoptera litura (Fabricius) (Lepidoptera: Noctuidae)

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Authors

R. K. Murali Baskaran ¹, M. S. Venugopal ¹, N. R. Mahadevan ¹

Affiliations
1 Department of Agricultural Entomology, Agricultural College and Research Institute, Madurai 625 104, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 11, No 1&2 (1997), Pagination: 17-22

Abstract

Laboratory screening of twelve optical brighteners as UV protectants for Spodoptera litura (Fabricius) NPV revealed that Ranipal BVN and 2B provided excellent protection (80% original activity remaining). Effect of optical brighteners in preserving NPV was concentration dependent and an increase in concentration from 0.001 to 1.00 per cent increased the retention of viral activity from 14.8 to 99.9 per cent and 10.8 to 99.9 per cent for Ranipal BVN and 2B, respectively. Addition of selected optical brighteners, Ranipal BVN and 2B at a range of 0.001 to 1.00 per cent with S. litura NPVincreased the virulence ofNPV by reducing the LC₅₀ and LT₅₀ of NPV.

Keywords

LC₅₀, LT₅₀, Optical Brighteners, Original Activity Remaining, Spodoptera litura NPV.

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• Effect of Host Plants on the Infectivity and Yield of Nuclear Polyhedrosis Virus on Spodoptera litura (Fabricius)

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Authors

R. K. Murali Baskaran ¹, M. S. Venugopal ¹, N. R. Mahadevan ¹

Affiliations
1 Agricultural College and Research Institute, Tamil Nadu Agricultural University, Madurai 625 104, Tamil Nadu, IN

Source

Journal of Biological Control, Vol 10, No 1&2 (1996), Pagination: 73-78

Abstract

Fourth instar larvae of Spodoptera litura (Fabricius) were reared on six species of virus treated host plants and a semi-synthetic diet and observed the influence of host plants on virus induced mortality, yield of nuclear polyhedrosis virus (NPV) and virulence of resultant virus. Larvae infected through tobacco leaves recorded the highest mortality (91.7%), while it was lowest through cotton leaves (61.7%). The pH of food materials had negative relationship (r = -0.85) with mortality. However, the variation among the host food with narrow range of pH (6.9 to 8) showed that the disparity of the influence of host food on the virus induced mortality may not be only due to pH. Larvae bred through virus contaminated semi-synthetic diet yielded maximum quantity of NPV (4.207x10⁹ POBs/g of larva) which was 1.95, 1.28, 1.25, 1.13, 1.11 and 1.08 folds greater than cotton, groundnut, sunflower, tobacco and castor, respectively. LC₅₀ and LT₅₀ of NPV were also influenced by host plants and semi-synthetic diet.

Keywords

LC₅₀, LT₅₀, pH, Sl NPV.

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• Evaluation of Toxicity of Emamectin Benzoate 5 Wg to Honey Bees

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Authors

K. Thangavel ¹, R. K. Murali Baskaran ¹, P. Parthiban ¹

Affiliations
1 Department of Agricultural Entomology, Agricultural College and Research Institute, (T.N.A.U.), Madurai (T.N.), IN

Source

International Journal of Plant Sciences, Vol 11, No 2 (2016), Pagination: 299-301

Abstract

Laboratory studies were carried out to assess the contact toxicity of emamectin benzoate 5 WG to workers of Indian bee, Apis cerana indica and Italian bee, Apis mellifera. Emamectin benzoate 5 WG to Indian bees showed that there was no mortality in emamectin benzoate 5 WG @ 100 and 125 g/ha, while emamectin benzoate 5 WG @ 150 g/ha caused 10.00 per cent at 6 (Hours after Treatment) HAT, and it increased to 6.67, 16.67 and 23.33 per cent, respectively after 24 HAT. However, standard insecticides lufenuron 5 EC @ 600 ml/ha, chlorantroniliprole 18.5 SC @ 150 ml/ha and spinosad 45 SC @ 125 ml/ha caused increased mortality of 30.00, 50.00 and 70.00 per cent, respectively. The mortality increased as the time of exposure increased from 6 to 24 HAT. Similar trend was also observed in Italian bees. Hence, emamectin benzoate 5 WG considered could be highly safe to both the species of honey bees than standard insecticides.

Keywords

Emamectin Benzoate, Honey Bees, Safety, Toxicity.

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References

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• Suganyakanna, S. (2006). Evaluation of acetamiprid 20 SP against sucking pest complex in cotton. Ph.D. Thesis, Tamil Nadu Agricultural University, Coimbatore, India. 190p.