Persistence and vertical distribution of termiticide fipronil in modified ground board test.

Persistence and vertical distribution of termiticide fipronil in modified ground board test. Research Abstract Details 

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Persistence and vertical distribution of termiticide fipronil in modified ground board test. Abstract Text:

Kk Sharma, Kalpana,Vandana Sharma,Pratigya Gupta,Maisnam Jaya,Anoop Kumar,Bijendra Singh,

Fipronil termiticide belongs to phenyl-pyrazole class of chemical compounds. It has broad-spectrum activity particularly against house hold pests such as cockroaches, mosquitoes, locusts, ticks, and fleas at both larval and adult stages. At high dosage it can be used to control subterranean termites in building foundations. To evaluate long term efficacy against termites the persistence and vertical distribution of fipronil was studied under natural weather conditions of Dehradun, India. Fipronil was applied at four concentrations i.e. 0.05, 0.1, 0.25 and 0.5% a.i ha(-1) by drenching 17 x 17 in.(2) plot prepared as per modified ground board test. Soil samples were collected after 22, 38 and 56 months of treatment up to the depth of 75 cm. The soil core was cut into five distinct sections i.e. 0-15, 15-30, 30-45, 45-60 and 60-75 cm depth. The residues were extracted by shaking 20 g soil sample with acetone. The acetone extract was concentrated and cleaned-up over florisil column. Fipronil residues were estimated on GLC at 220, 260, and 300 degrees C oven, injector and detector temperature respectively. Fipronil was found to persist beyond 56 months after application. Two metabolites viz. desulfinyl and sulfide-fipronil were detected in sampling after 22 months of application that also dissipated with time. Fipronil residues were found up to 60 cm depth. The residues in deeper layers dissipate slowly with time and after 56 months of treatment residues were detected only up to 30 cm depth.

Persistence and vertical distribution of termiticide fipronil in modified ground board test. Publishing Authors By Initials

K Sharma, Kalpana,V Sharma,P Gupta,M Jaya,A Kumar,B Singh,

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Persistence and vertical distribution of termiticide fipronil in modified ground board test. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Environmental monitoring and assessment

VOLUME: 137

Page Numbers: 179-84

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ISSN: 0167-6369

DAY: 15

MONTH: 05

YEAR: 2007

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LANGUAGE: eng

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AFFILIATION: All India Network Project on Pesticide Residues, Division of Agricultural Chemicals, IARI, New Delhi, 110 012, India, kksaicrp@yahoo.co.in.

Country: Netherlands

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MEDLINETA: Environ Monit Assess

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