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Visnupriya, M.
- Antifeedant Activity and Field Evaluation of Spinetoram 12 SC against Termite, Odontotermes obesus on Sugarcane
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Authors
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 12, No 2 (2019), Pagination: 87-93Abstract
In this experiment a new insecticide molecule, spinetoram 12 SC was taken up to evaluate its antifeedant and repellent activity in laboratory and efficacy in the field with different mode of application against termite control. Laboratory experiments were conducted in Insectary, Agricultural College and Research Institute, Madurai. Field experiments were laid out in Randomized Block Design at farmer’s field located in Mandhikanmai village, Kalayarkoil Block, Sivagangai district during 2014 – 2015 and to study the effect of sett treatment and soil drenching of spinetoram 12 SC with variety CO 86032. At the time of planting, sugarcane setts were treated with various doses of spinetoram 12 SC (90, 120, 150 and 180 g a.i./ha) and covered with soil. After planting in 35 days old sugarcane soil drenching treatment was also effected with the same dose of sett treatment. Imidacloprid 20 SL, Rynaxypyr 20 SC and chlorpyrifos 20 EC were standard checks. The cumulative mean food consumption was minimum 0.71 g, 0.78 g, 1.02 g, 1.23 g, 1.44 g and 1.56 g in various concentrations of spinetoramviz., 360, 300, 240, 180, 120 and 60 ppm, respectively. The highest mean per cent repellent action was noticed in spinetoram 360 ppm and 300 ppm (93.4 and 91.2%, respectively) at 12 HAT. Field experiments were inferred that spinetoram 12 SC 180 and 150 g a.i./ha were significantly effective in minimizing number of termite colony per plot, number of termites per colony and per cent sett damage in both sett treatment and soil drenching methods.Keywords
Sugarcane, Spinetoram 12 SC, Antifeedant Activity, Odontotermes obesus, Sett Treatment, Soil Drenching
References
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- Persistence Toxicity and Field Evaluation of Spinetoram 12 SC against Spodoptera litura Fabricius on Okra
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Authors
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 13, No 1 (2020), Pagination: 18-23Abstract
Spodoptera litura (Fabricius) is a destructive defoliating polyphagous pest on various crops throughout India especially in vegetable crops. Experiments were undertaken to investigate the persistence of spinetoram 12 SC against larval stage of S. litura in the laboratory and to evaluate the effectiveness in the field in two seasons. The results of persistence toxicity revealed that there was continuous larval reduction upto 14 DAT under the laboratory condition in different doses of biological green insecticide spinetoram (36, 45 and 54 g a.i/ha). This reinforces the need to reapply spinetoram 10 – 14 days after the first application (peak of biological activity) for effective control. The order of relative efficacy (ORE) of the insecticides based on the persistent toxicity index (PTI) values was spinetoram 12 SC 54 g a.i./ha > spinetoram 12 SC 45 g a.i./ha > cypermethrin 25 EC 50 g a.i/ha > emamectin benzoate 5 SG 8.5 g a.i/ha > spinetoram 12 SC 36 g a.i./ha > quinalphos 25 EC 200 g a.i/ha. In field experiments spinetoram 12 SC was significantly effective at 45 and 54 g a.i./ha when sprayed thrice at 15 days interval and minimized the incidence of Spodoptera litura.Keywords
Spinetoram 12 SC, Okra, Persistence Toxicity, Field Efficacy, Spodoptera litura.References
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