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Patil, Dinesh L.
- Biology of Tetranychus Urticae Koch (acarina: Tetranychidae) on Carnation under Laboratory Conditions
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Authors
Affiliations
1 Department of Entomology,n.m. College of Agriculture, Navsari Agricultural University, Navsari (gujarat), IN
2 Main Sorghum Research Station (n.a.u.), Surat (gujarat), IN
1 Department of Entomology,n.m. College of Agriculture, Navsari Agricultural University, Navsari (gujarat), IN
2 Main Sorghum Research Station (n.a.u.), Surat (gujarat), IN
Source
International Journal of Plant Protection, Vol 7, No 2 (2014), Pagination: 334-338Abstract
Biology of Tetranychus urticae Koch was studied under laboratory at 27.79 ± 4.40°C temperature and 79 ± 5.75 per cent RH during Sept. 2008. The finding showed that life cycle of T. urticae consisted of five stages viz., eggs, larva, protonymph, deutonymph and adult and one short inactive stage called quiescent stage. The eggs incubation period of T. urticae was 3.29±0.62 days. The larval body measured 0.14±0.01 mm in length and 0.10±0.01 mm in width and lived for 1.79±0.64 days in male and 2.71±0.57 days in female. The mature larva entered in a quiescent stage (nymphochrysalis). The total developmental period was longer in female (10.61±1.21 days) as compared to male (8.44±1.75 days). Mated female lived for longer time and laid higher number of eggs than unmated female. Mated female produced progeny consisting of both sexes, whereas, unmated female invariably gave rise to male progeny.Keywords
Tetranychus Urticae, Biology, Carnation
- Bio-efficacy of Acaricides against Two Spotted Spider Mite, Tetranychus Urticae Koch (acarina: Tetranychidae) Infesting Carnation (cv. Beaumonde) under Protected Cultivation
Abstract Views :339 |
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Authors
Affiliations
1 Department of Entomology,n.m. College of Agriculture, Navsari Agricultural University, Navsari (Gujarat), IN
2 Main Sorghum Research Station, Navsari Agricultural University, Surat (Gujarat), IN
1 Department of Entomology,n.m. College of Agriculture, Navsari Agricultural University, Navsari (Gujarat), IN
2 Main Sorghum Research Station, Navsari Agricultural University, Surat (Gujarat), IN
Source
International Journal of Plant Protection, Vol 7, No 2 (2014), Pagination: 429-432Abstract
The acaricides tested for the bio-efficacy against Tetranchyus urticae under polyhouse conditions revealed that all the acaricidal treatments were significantly superior to untreated control in checking the mite population under polyhouse conditions. Among acaricides, propargite 0.05 per cent gave 69.19 per cent mite population reduction after two application. The next best treatment in order of effectiveness was abamectin 0.0025 per cent (63.34%) and it also exhibited consistent performance as second best treatment, followed by dimethoate 0.03 per cent (57.97%). However, the benefit cost ratio showed that propargite and dimethoate were most economical with net BCR of 1: 8.98 and 1: 8.93, respectively and gave effective control of T. urticae.Keywords
Tetranychus Urticae, Carnation, Acaricides- Relative Efficacy, Helicoverpa armigera (Hubner), Tomato.
Abstract Views :649 |
PDF Views:0
Authors
Affiliations
1 Department of Entomology, N.M. College of Agriculture, Navsari Agricultural University, Navsari (Gujarat), IN
1 Department of Entomology, N.M. College of Agriculture, Navsari Agricultural University, Navsari (Gujarat), IN
Source
International Journal of Plant Protection, Vol 8, No 2 (2015), Pagination: 250-255Abstract
Field experiment conducted on relative efficacy of nine different insecticides against H. armigera (Hubner) in tomato during year 2012-13 revealed that all the nine insecticides were significantly superior to untreated control in reducing H. armigera infestation. However, flubendiamide 0.004 per cent recorded minimum larval population (0.43 larva/plant) and 10.09 per cent fruit damage on weight basis than the remaining treatments which was identical with chlorantraniliprole 0.0055 per cent (0.58 larva/plant and 10.62 % fruit damage) and spinosad 0.0068 per cent (0.68 larva/plant and 11.34 % fruit damage). Higher marketable yield recorded from treatments of flubendiamide 0.004 per cent chlorantraniliprole 0.0055 per cent and spinosad 0.0068 per cent with 25.21, 24.84 and 22.20 tonnes/ha, respectively.Keywords
Relative Efficacy, Helicoverpa armigera (Hubner), Tomato.References
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