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Satyanarayana, Paidi
- Evaluation of Phenyl Pyrazole for the Managaement of Yellow Stem Borer Scirpophaga Incertulas Walker in Rice
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Authors
Affiliations
1 Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (U.P.), IN
1 Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi (U.P.), IN
Source
International Journal of Plant Protection, Vol 7, No 2 (2014), Pagination: 360-363Abstract
Field experiment was conducted at Banaras Hindu University research farm, Varanasi, on hybrid rice variety PHB 71 during Kharif season of 2012 to study impact of granular formulation of phenyl pyrazole on rice yellow stem borer, Scirpophaga incertulas (Walker). Results revealed that in terms of efficacy against stem borer, overall performance of various spraying insecticidal treatments based on the mean indicated that treatment with Fipronil 0.6 per cent GR @ 60g a.i./ha was the most effective and significantly superior over all other treatments in reducing the dead hearts to minimum level of 3.40 per cent. Fipronil 0.6 per cent GR @ 50g a.i./ha stood second in order of effectiveness which recorded 4.45 per cent dead hearts. The Carbofuran 3 GR @ 750g a.i./ha. proved least effective in which higher per cent of dead hearts of 5.08 were observed. The untreated control recorded 6.88 per cent dead hearts.Keywords
Fipronil, Phenyl Pyrazole, Yellow Stem Borer, Scirpophaga Incertulas
- Dissipation and Decontamination of Imidacloprid and Lambda - Cyhalothrin Residues in Brinjal
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Authors
Affiliations
1 Department of Entomology, Rajendra Agricultural University, Pusa, Samastipur (Bihar), IN
1 Department of Entomology, Rajendra Agricultural University, Pusa, Samastipur (Bihar), IN
Source
International Journal of Plant Protection, Vol 8, No 2 (2015), Pagination: 379-383Abstract
Residues ofimidacloprid at 20 g a.i. ha-1 and lambda - cyhalothrin at 15 g a.i. ha-1 were estimated quantitatively by HPLC/GLC in/on brinjal fruits. Initial deposits of insecticides were higher in imidacloprid than lambda - cyhalothrin. Initial deposits of 0.652 mg kg-1 of imidacloprid dissipated to 93.17 per cent on 10th day. In lambda - cyhalothrin the initial deposits were 0.138 mg kg-1 which dissipated to 92.75 per cent on 10th day. The degradation of imidacloprid was relatively higher as compared to lambda - cyhalothrin. Both imidacloprid and lambda - cyhalothrin had half - life values of 1.92 and 2.65 days, respectively on brinjal fruits. The safe waiting period for imidacloprid was found 4.70 days. In lambda - cyhalothrin, no waiting period is required after its application as the initial deposits were less than its MRL (0.3 mg kg-1).Keywords
Dissipation, Decontamination, Imidacloprid, Lambda - Cyhalothrin, Brinjal.References
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