Browsing by Author "Santeshwari"

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Diversity of springtails (collembola: Insecta) in different tree ecosystems of Varanasi, India
(Ecological Society of India, 2016) Tsering Toldan; Santeshwari; M. Raghuraman; Dharmendra Kumar
Diversity of collembola in different tree ecosystems, were investigated in Varanasi, Uttar Pradesh. A total of 2568 specimens of 10 genera belonging to 8 families viz., Isotomidae, Entomobryidae, Paronellidae, Cyphoderidae, Onychiuridae, Hypogastruridae, Sminthurididae, and Katiannidae were recorded. Collembola genera viz., Lepidocyrtus sp., Entomobrya sp., Hypogastrurasp., Sminthurinus sp, Sminthurides sp, were most common among almost all the ecosystems followed by Isotomurus sp., Crytopygus sp., Cyphoderus sp., Onychiurus sp, and Folsomia sp. A Maximum population of 17.71% was recorded during the month of September in Bael ecosystem and minimum in the Aonla ecosystem. In the abundance of collembola in general, there were pronounced seasonal fluctuations of different genera in all the ecosystems. Two peaks in September and October and a fall in December was observed in the population fluctuation. The distribution and abundance of soil fauna was more during monsoon period. These organisms play a functional role in soil ecosystem and there is lack of enough records of these beneficial insects from different ecosystems.
Impact of granular formulation of conventional and newer insecticides against brown planthopper Nilaparvata lugens in rice crop
(Plant Archives, 2014) Paidi Satyanarayana; M. Raghuraman; Santeshwari
An experiment was conducted on hybrid rice variety PHB 71 to study field efficacy of granular formulation of fipronil and conventional insecticides viz., carbofuran and cartap hydrochloride against brown planthopper in rice crop at Banaras Hindu University research farm, Varanasi. The trials were laid in RBD with seven treatments including control, replicated thrice. The overall performance of various granular insecticidal treatments were assessed based on per cent increase in grain yield over control. Plots treated with Fipronil 0.6% GR @ 60g a.i./ha was the most effective and significantly superior over all other treatments in reducing the hopper infestation (2.0/hill) as compared to untreated control (13.7/hill) and realizing 60.0 per cent increase in grain yield over control. Fipronil 0.3% GR @ 60g a.i./ha stood second in order of effectiveness which recorded 58.27 percent. Cartap Hydrochloride 4% GR @ 750g a.i./ha proved least effective in which 28.86 per cent increase in yield was observed. © 2014, Plant Archives. All rights reserved.