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Sakthivel, P.
- Predatory Potential of Chrysoperla zastrowi sillemi (Esben-Peterson) and Cryptolaemus Predatory Potential of Chrysoperla zastrowi sillemi (Esben-Peterson) and Cryptolaemus Montrouzieri Mulsant on Paracoccus marginatus (Williams and Granara De Willink) Infesting Sunflower
Abstract Views :243 |
PDF Views:139
Authors
M. Suganthy
1,
P. Sakthivel
1
Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 003, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 26, No 1 (2012), Pagination: 88-91Abstract
Predatory potential of Chrysoperla zastrowi sillemi (Esben-Peterson) and Cryptolaemus montrouzieri Mulsant on Paracoccus marginatus (Williamsand Granara de Willink) infesting sunflower was studied in the lab. Results revealed that grubs of C. zastrowi sillemi was 1.4 ± 0.5, 85.0 ± 7.3 and 13.2 ± 1.3 ovisacs, nymphs and adults, respectively. Among various instars of the predator, second and third instar were voracious and consumed 1.6 ± 0.5, 139.0 ± 5.4 and 22.8 ± 2.1 and 3.4 ± 0.5, 230.4 ± 29.2 and 32.5 ± 2.6 ovisacs, nymphs and adults of P. marginatus, respectively. Grubs of C. montrouzieri fed 7.6 ± 0.7, 153.6 ± 23.8 and 62.8 ± 11.6 ovisacs, nymphs and adults of P. marginatus to complete their life stages. Among various instars of the predator, third and fourth instar were voracious and consumed 2.2 ± 0.4, 43.6 ± 2.0 and 23.2 ± 3.0 and 2.8 ± 0.4, 69.6 ± 4.6 and 27.6 ± 4.6 ovisacs, nymphs and adults of P. marginatus, respectively. Adult C. montrouzieri consumed on an average 5.2 ± 0.8, 101.2 ± 13.5 and 35.4 ± 8.6 ovisacs, nymphs and adults of P. marginatus.Keywords
Predatory Potential, Chrysoperla zastrowi sillemi, Cryptolaemus Montrouzieri, Paracoccus marginatus, Sunflower.Full Text
References
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- Toxicity of Insecticides to Papaya Mealybug Parasitoid, Acerophagus papayae (Noyes and Schauff) (Hymenoptera: Encyrtidae)
Abstract Views :280 |
PDF Views:154
Authors
Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 00, Tamil Nadu, IN
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore 641 00, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 26, No 3 (2012), Pagination: 274–278Abstract
Toxicity of selected insecticides to papaya mealybug parasitoid, Acerophagus papayae (Noyes and Schauff) (Hymenoptera: Encyrtidae) was evaluated at 1, 3, 6 and 24h after treatment (HAT). Results showed that Thiamethoxam, Chlorpyriphos and Dichlorvos showed very high knock-down effect (100 % mortality) of A. papayae adults within 3 HAT. Fish Oil Rosin Soap (FORS) and Neem oil had very less detrimental effect on adult parasitoids by recording very low mortality percentage at 24 HAT. The residual toxicity data revealed that Thiamethoxam was the most persisting insecticide causing 26.67 per cent mortality of A. papayae even after 28 days after treatment (DAT). Neem oil and Fish Oil Rosin Soap became less or non toxic to adults of A. papayae at three DAT.Keywords
Toxicity, Insecticides, Acerophagus papayae.Full Text
References
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- Sakthivel P. 2011. Biological suppression of papayamealybug Paracoccus marginatus (Williams andGranara de Willink) (Pseudoccoccidae : Hemiptera)Ph.D. Thesis. Tamil Nadu Agric. Univ., Coimbatore,India. 142 p.
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