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Sampathkumar, M.
- Influence of Rice Stem Borer Sex Pheromones on The Behaviour of Its Egg Parasitoids
Abstract Views :360 |
PDF Views:119
Authors
M. Sampathkumar
1,
G. Ravi
2
Affiliations
1 Directorate of Rice Research, Rajendranagar, Hyderabad 500 030, Andhra Pradesh, IN
2 Department of Entomology, AC&RI, Killikulam, Tamil Nadu 628252, IN
1 Directorate of Rice Research, Rajendranagar, Hyderabad 500 030, Andhra Pradesh, IN
2 Department of Entomology, AC&RI, Killikulam, Tamil Nadu 628252, IN
Source
Journal of Biological Control, Vol 27, No 3 (2013), Pagination: 171–175Abstract
The egg parasitoids Trichogramma japonicum Ashmead (Hymenoptera: Trichogrammatidae), Tetrastichus schoenobii Ferriere (Hymenoptera: Eulophidae) and Telenomus dignus (Gahan) (Hymenoptera: Scelionidae) are key biotic factors that regulate stem borer population. Augmentation and conservation of these parasitoids is an essential component of Integrated Pest Management (IPM) strategies for stem borers. Similarly, use of sex pheromone technology either by monitoring or mass trapping is also gaining momentum in managing rice stem borers. The synergistic effect of indigenous blends of sex pheromone (YSB and YSB-PSB) on the behaviour of egg parasitoids of stem borer was studied through olfactometer assay. Among the three egg parasitoids tested T. dignus exhibited greater response for a longer period, to its host YSB sex pheromone compound (Z)-11 hexadecenal + (Z)-9 hexadecenal at 0.5 μl treatment dose with an attraction index (AI) per cent of 19.36 followed by T. japonicum (10.76) and T. shoenobii (6.35). The treatment doses at 1.0 and 2.0 μl resulted in lesser orientation. Similarly, for individual compound, (Z)-11 hexadecenal had elicited little attraction to all parasitoids studied. The YSB-PSB sex pheromone compound comprising (Z)-11-hexadecenal, (Z)-11-hexadecenol, (Z)-11- hexadecenyl acetate, and (Z)-9-hexadecenal, irrespective of treatment doses and parasitoid species, resulted in lesser or poor attraction. Results revealed that host synthetic YSB pheromone at lower concentration attracted and retained egg parasitoids for a longer period and elicited as a synomone and kairomone kind of source.Keywords
Olfactometer, Parasitoids, Pheromone, Telenomus dignus, Tetrastichus schoenobii, Trichogramma japonicum.References
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- Krishnaiah K, Varma NRG, Pasalu IC. 2008. Potential for pheromone in rice pest management, pp 16. In: National seminar on pheromone technologies: Strengthening Eco friendly Agriculture in India.
- Lewis WJ, Richard LJ, Nordulund AD, Gross HR. 1975. Kairomones and their use for the management ofentomophagous insects. I. Mechanism causing increase in rate of parasitization by Trichogramma spp. J Chem Ecol. 3: 349–360.
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- Padmavathi Ch, Paul AVN. 1997. Kairomones by three host insects and their impact on the egg parasitiod Trichogramma chilonis. Indian J Ent. 59:85–92.
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- Research Article Risk Assessment of Trichogramma chilonis (Fab.) to New Molecules Evaluated against Spotted Bollworm, Earias vittella Ishii in Cotton
Abstract Views :249 |
PDF Views:132
Authors
Affiliations
1 Department of Sericulture, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
2 Directorate of Rice Research, Rajendranagar, Hyderabad 500 030, Andhra Pradesh, IN
1 Department of Sericulture, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
2 Directorate of Rice Research, Rajendranagar, Hyderabad 500 030, Andhra Pradesh, IN
Source
Journal of Biological Control, Vol 27, No 4 (2013), Pagination: 272–277Abstract
Studies were carried out in the laboratory to assess the acute toxicity of new molecules viz., abamectin, emamectin benzoate, indoxacarb and spinosad to target pest, Earias vittella (Fab.) and selective toxicity to non-target insect, Trichogramma chilonis (Ishii) in terms of LD50/LC50 and LD95/LC95 and assessing risk hazards associated with the use of new molecules for integration in IPM. Acute toxicity of the four test molecules was found to be 0.00264, 0.00266, 0.09270 and 0.00188 μg larva-1 and were less toxic to T. chilonis than the target pest when analyzed through various risk assessment methods and can be recommended for IPM. Among the four methods evaluated, hazard ratio is the best as it accounted for the field dose as criteria for determining the toxicity of the insecticides tested.Keywords
Abamectin, Emamectin Benzoate, Indoxacarb, Spinosad, Trichogramma chilonis, Earias Vittella.References
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- Biodiversity and Predatory Potential of Coccinellids of Rice Ecosystems
Abstract Views :277 |
PDF Views:154
Authors
Chitra Shanker
1,
M. Sampathkumar
2,
V. Sunil
1,
S. Amudhan
1,
G. Sravanthi
3,
B. Jhansirani
4,
J. Poorani
5,
Gururaj Katti
1
Affiliations
1 ICAR - Indian Institute of Rice Research, Rajendranagar, Hyderabad - 500030, Telangana, IN
2 ICAR-National Bureau of Agricultural Insect Resources, Hebbala, Bengaluru - 560024, Karnataka, IN
3 Mango Research Station, Nuzvid - 521201, Dr YSR Horticultural University, Andhra Pradesh, IN
4 ICAR - Indian Institute of Rice Research, Rajendranagar, Hyderabad - 500030, Telangana,, IN
5 ICAR-National Research Centre for Banana, Thayanur post, Tiruchirapalli - 620102, Tamil Nadu, IN
1 ICAR - Indian Institute of Rice Research, Rajendranagar, Hyderabad - 500030, Telangana, IN
2 ICAR-National Bureau of Agricultural Insect Resources, Hebbala, Bengaluru - 560024, Karnataka, IN
3 Mango Research Station, Nuzvid - 521201, Dr YSR Horticultural University, Andhra Pradesh, IN
4 ICAR - Indian Institute of Rice Research, Rajendranagar, Hyderabad - 500030, Telangana,, IN
5 ICAR-National Research Centre for Banana, Thayanur post, Tiruchirapalli - 620102, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 32, No 1 (2018), Pagination: 25-30Abstract
Coccinellid species belonging to fifteen genera, under five tribes of the family Coccinellidae were collected and identified in this study. Harmonia (Fab.) was the most predominant in southern regions and Coccinella septumpunctata L. was more abundant in the northern and hill regions. Margalef richness index ranged from 9.07 to 14.00 while the species richness directly measured by Hills number H0 ranged from 5-10, with highest species richness present at Malan, Himachal Pradesh. The highest predation was observed in female H. octomaculata which fed on a maximum of 8.00, 7.42 and 6.59 brown planthopper (BPH), WBPH white backed planthopper (WBPH) and green leafhopper (GLH) respectively per day, while the lowest was observed in Propylea dissecta which fed on 3.18 to 4.50 hoppers per day. Coccinellids like H. octomaculata can be utilized in biological control programmes as a part of Integrated Pest Management to reduce pest outbreaks.Keywords
Biodiversity, BPH, Coccinellids, Predatory Potential, Rice, WBPH.References
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- Cautionary Note on the Presence of Homalotylus turkmenicus Myartseva (Hymenoptera: Encyrtidae) in the Colonies of Phenacoccus manihoti Matile-Ferrero (Hemiptera: Pseudococcidae) in Southern India
Abstract Views :225 |
PDF Views:126
Authors
Ankita Gupta
1,
M. Mohan
2,
M. Sampathkumar
3,
A. N. Shylesha
3,
S. R. Venkatachalam
4,
N. Bakthavatsalam
3
Affiliations
1 ICAR–National Bureau of Agricultural Insect Resources, Germplasm collection and characterization, IN
2 ICAR-National Bureau of Agricultural Insect Resources, 2491, H. A. Farm Post, Bellary Road, Hebbal, Bengaluru - 560 024, Karnataka, IN
3 ICAR-National Bureau of Agricultural Insect Resources, 2491, H. A. Farm Post, Bellary Road, Hebbal, Bengaluru - 560024, Karnataka, IN
4 TCRS, TNAU, Yethapur - 636 117, Tamil Nadu
1 ICAR–National Bureau of Agricultural Insect Resources, Germplasm collection and characterization, IN
2 ICAR-National Bureau of Agricultural Insect Resources, 2491, H. A. Farm Post, Bellary Road, Hebbal, Bengaluru - 560 024, Karnataka, IN
3 ICAR-National Bureau of Agricultural Insect Resources, 2491, H. A. Farm Post, Bellary Road, Hebbal, Bengaluru - 560024, Karnataka, IN
4 TCRS, TNAU, Yethapur - 636 117, Tamil Nadu
Source
Journal of Biological Control, Vol 34, No 2 (2020), Pagination: 158-160Abstract
High percentage of Homalotylus turkmenicus Myartseva (Hymenoptera: Encyrtidae) parasitizing Hyperaspis maindroni Sicard (Coleoptera: Coccinellidae) predating on the colonies of the Cassava Mealybug (CMB) Phenacoccus manihoti Matile-Ferrero (Hemiptera: Pseudococcidae) is observed in southern India. In the present study, cautionary note on the presence of H. turkmenicus in the food web of insects associated with the CMB and brief diagnosis of the parasitoid is presented for quick identification. The parasitism of Hy. maindroni grubs by H. turkmenicus ranged from 65.67 to 80.95 per cent. However, no primary parasitoid of the cassava mealybug was observed so far.Keywords
Cassava Mealybug, Hyperparasitoid, Predation.References
- Joshi S, Pai SG, Deepthy KB, Ballal CR & Watson GW. 2020. The cassava mealybug, Phenacoccus manihoti Matile-Ferrero (Hemiptera: Coccomorpha: Pseudococcidae) arrives in India. Zootaxa 4772(1):191−194. https://doi.org/10.11646/zootaxa.4772.1.8
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