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Rajavel, D. S.
- Note on the first Occurrence of Trilocha (=Ocinara) Varians Walker (Bombycidae : Lepidoptera) as a Pest of Pipal Tree (Ficus religiosa L.) in Madurai, Tamil Nadu
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Indian Forester, Vol 133, No 12 (2007), Pagination: 1706-1708Abstract
No abstract
- Effect of Tomatine on Termitomyces Fungus in Termitaria of Subterranean Termites Odontotermes wallonensis Wasmann
Abstract Views :161 |
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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
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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: 97-101Abstract
A secondary alkaloid, tomatine was extracted from unripen fruits and leaves of tomato. It is a potent antifungal and insecticidal compound that interacts with sterols in the membranes of the insects and shows efficacy against insects and many species of termites. In this research, investigations were carried out to study the antifeedant and repellent activity of tomatine against the termite species Odontotermes wallonensis Wasmann. The result concluded that lowest consumption of food by O. wallonensis workers was recorded in Azadirachtin 100 ppm (0.15 g) followed by Tomatine 250 ppm (0.60 g). Soldiers and nymphs of O.wallonensis consumed 0.54g and 0.56g food in tomatine 250 ppm treatment whereas in treated check (Azadirachtin 100 ppm) consumed 0.14g in both castes as compared to untreated check (1.33 and 1.46 g). And also exhibited the highest repellent activity towards termites at all the doses. Tomatine 1000 ppm caused 82.13, 73.41 and 88.67 per cent repellent activity whereas Azadirachtin 100 ppm caused 88.67, 78.96 and 92.00 per cent in O. wallonensis workers, soldiers and nymphs, respectively.Keywords
Tomatine, Secondary Alkaloid, Termites, Azadirachtin, Repellent Activity.- The Field Efficacy of Newer Insecticide Molecules against Major Pod Borers of Black Gram
Abstract Views :307 |
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Authors
Affiliations
1 Department of Agriculture Entomology, Agriculture College and Research Institute, Madurai – 625 104, Tamil Nadu, IN
2 Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore – 641 003, Tamil Nadu, IN
3 Regional Research Station, Aruppukkottai – 626 101, Tamil Nadu, IN
1 Department of Agriculture Entomology, Agriculture College and Research Institute, Madurai – 625 104, Tamil Nadu, IN
2 Department of Plant Pathology, Tamil Nadu Agricultural University, Coimbatore – 641 003, Tamil Nadu, IN
3 Regional Research Station, Aruppukkottai – 626 101, Tamil Nadu, IN
Source
Toxicology International (Formerly Indian Journal of Toxicology), Vol 27, No 1&2 (2020), Pagination: 1-6Abstract
The purpose of this study is to observe newer insecticide molecules against pod borer complex such as Maruca vitrata, Euchrysops cnejus. Field experiments were conducted during 2017-2018 to study black gram under rainfed condition 6.20. Flubendiamide 480 SC recorded the lowest larval population of Maruca vitrata (2.40 larvae/plant) under field condition followed by thiodicarb (3.33 larvae/plant) whereas untreated check recorded (9.04 larvae/plant). Among the newer insecticide molecules, lowest gram blue butterfly larval population was recorded in thiodicarb 75 % WP (1.64 larvae/ plant) followed by flubendiamide 480 (1.83). The standard check registered (11.75). Lowest Maruca vitrata pod damage was recorded in flubendiamide 480 SC (5.25 %) followed by thodicarb 75 % WP (5.55 %). Thiodicarb 75% recorded lowest percentage (3.8) of Euchrysops cnejus pod damage among newer insecticides molecules.Keywords
Black Gram, Euchrysops cnejus, Maruca vitrata, Newer Insecticide Molecules.References
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