Response of phosphine-resistant mixed-age cultures of lesser grain borer, Rhyzopertha dominica (F.) to different phosphine-carbon dioxide mixtures.

Manivannan, S. and Gisha Elizabeth, Koshy and Swati Ashokrao, Patil (2016) Response of phosphine-resistant mixed-age cultures of lesser grain borer, Rhyzopertha dominica (F.) to different phosphine-carbon dioxide mixtures. Journal of Stored Products Research, 69. pp. 175-178.

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Abstract

Mixed-age cultures of a phosphine-resistant strain of lesser grain borer, Rhyzopertha dominica (F.) were exposed to various concentrations of phosphine and phosphine plus 10, 20 and 30% carbon dioxide combinations (CO2) for different time intervals at 25 �C to evaluate the comparative efficacy of admixtures of phosphine-CO2. The mortality data of the mixed age cultures were recorded taking the adult count at weekly intervals for 8 weeks. Lethal concentrations were determined by probit analysis. Phosphine with carbon dioxide exerted significant synergistic effect on the mortality of mixed-age cultures at 4, 6 and 7 days of exposure, while individually phosphine or carbon dioxide did not show a raised increase in their response. The addition of 30% carbon dioxide to lower concentrations of phosphine over shorter exposures of 4 days showed better synergistic effect among the treatments. The present study revealed that CO2 augmented the effect of phosphine thereby reducing the concentration and exposure time required to bring about significant mortality in the mixed-age cultures of R. dominica.

Item Type:	Article
Uncontrolled Keywords:	Phosphine Rhyzopertha dominica Carbon dioxide Synergism
Subjects:	600 Technology > 03 Agriculture > 05 Insect/Pest Control
Divisions:	Food Protectants and Infestation Control
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	30 Jun 2017 10:56
Last Modified:	30 Jun 2017 10:56
URI:	http://ir.cftri.res.in/id/eprint/12731

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