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Nisha, R.
- Fitness Trade-offs in Parasitoid-host System: With Special Reference to Acerophagus papayae Noyes on Papaya Mealybug, Paracoccus marginatus Williams and Granara De Willink
Abstract Views :384 |
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Authors
R. Nisha
1,
J. S. Kennedy
1
Affiliations
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, T.N., IN
1 Department of Agricultural Entomology, Tamil Nadu Agricultural University, Coimbatore, T.N., IN
Source
International Journal of Plant Protection, Vol 7, No 2 (2014), Pagination: 275-280Abstract
Development and parasitic potential of Acerophagus papayae Noyes on the papaya mealybug, Paracoccus marginatus Williams and Granara de Willink from different host plants like papaya, cotton, mulberry, tapioca, brinjal and hibiscus were studied. The development time of parasitoid, A. papayae in the current study was shortest in mealybugs reared from papaya (10.9 days), followed by cotton (11.8 days), mulberry (12.4 days), brinjal (13.1 days), hibiscus (14.1 days) and recorded 16.3 days of development in tapioca reared papaya mealybug. The parasitisation rate was found to be highest in second instar than third instar and adult female mealybugs from host crop papaya viz., 87.5 per cent followed by cotton (84.2 %), mulberry (80.8 %), brinjal (80.0 %) and potato sprouts (75.8 %) and recorded lowest parasitisation rate in tapioca (67.5%). The parasitization level of parasitoid, A. papayae was maximum in papaya and minimum in tapioca due to the host plant induced changes in the mealybug. The development time was inversely correlated with the parasitic potential and so there was a trade-off between the development and parasitic potential of parasitoid.Keywords
Fitness Trade-offs, Parasitoid, Acerophagus papayae, Papaya Mealybug, Paracoccus marginatus- Effect of Tomatine on Termitomyces Fungus in Termitaria of Subterranean Termites Odontotermes wallonensis Wasmann
Abstract Views :152 |
PDF Views:1
Authors
R. Nisha
1,
D. S. Rajavel
2
Affiliations
1 Department of Crop Protection, Imayam Institute of Agriculture and Technology, Kannanur, Thuraiyur, Trichy (T.N.), IN
2 Department of Agricultural Entomology, Agricultural College and Research Institute, Killikulam, Tuticorin (T.N.), IN
1 Department of Crop Protection, Imayam Institute of Agriculture and Technology, Kannanur, Thuraiyur, Trichy (T.N.), IN
2 Department of Agricultural Entomology, Agricultural College and Research Institute, Killikulam, Tuticorin (T.N.), IN
Source
International Journal of Plant Protection, Vol 9, No 1 (2016), Pagination: 26-29Abstract
Tomatine is a glycoalkaloid found in the stems and leaves of tomato plants, which has fungicidal properties. This laboratory studies were carried out to find out the efficacy of tomatine on the Termitomyces fungus found in the termitaria of O. wallonensis, it was applied through Difco media for fungal growth. The overall period of observations (15 days) revealed that tomatine 1000 ppm effectively reduced the mean diameter growth of fungus (1.41 cm) followed by tomatine 900 ppm (1.52 cm). The fungal growth of fungus in the standard check carbendazim 500 ppm was 1.32 cm whereas it was 8.17 cm in untreated check. The highest suppression of fungus was noticed in carbendazim 500 ppm (84.59 %) which was on par with tomatine 1000 ppm (83.44 %). Tomatine 900 ppm was also suppressed the fungus effectively at 82.08 per cent. The least mean per cent suppression (68.37 %) was noticed in the lower concentration of tomatine 600 ppm. The per cent suppression of fungal growth was decreased from 5th day to 15th day of observation. This study was supported by many earlier contributions. Finally the result was concluded that tomatine could be used as a termiticide to control fungus growing termites.Keywords
Tomatine, Subterranean Termites, Termitaria, Termitomyces.- Effect of Tomatine on Termites Odontotermes wallonensis (Wasmann) vis-a-vis Antifeedant and Repellent Activity
Abstract Views :167 |
PDF Views:1
Authors
R. Nisha
1,
D. S. Rajavel
2
Affiliations
1 Department of Crop Protection, Imayam Institute of Agriculture and Technology, Kannanur, Thuraiyur, Trichy (T.N.), IN
2 Department of Agricultural Entomology, Agricultural College and Research Institute, Killikulam, Tuticorin (T.N.), IN
1 Department of Crop Protection, Imayam Institute of Agriculture and Technology, Kannanur, Thuraiyur, Trichy (T.N.), IN
2 Department of Agricultural Entomology, Agricultural College and Research Institute, Killikulam, Tuticorin (T.N.), IN