Bioassay Methods for Stored Grain Pests
Debjyoti Chakraborty*
Assam Agricultural University Department of Entomology, Jorhat, Assam (785 013), India
Abhinandan Yadav
Assam Agricultural University Department of Entomology, Jorhat, Assam (785 013), India
DOI: NIL
Keywords: Bioassay, Heterogeneity, Population, Toxicant
Abstract
Bioassay or Biological assay means the measurement of the effect of insecticides on living organisms. The three advantages of bioassay in storage entomology are analyzation of amount of an insecticide, efficiency of new toxicants or formulations and comparison of susceptibility of species or strains within a given species. All involve a quantitative relation between dosage and response which is best expressed by the log dosage-probit (1d-p) line. The slope of this line is a measure of the heterogeneity of the population used with respect to the toxicant. An intermediate heterogeneity is usually preferable. Contact between test insects and toxicant is very difficult to standardize. Many procedures and devices have been used for this purpose.
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Reference
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