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THE EFFECT OF REPEATED SPRAYING OF INSECTS IN INCREASING THEIR RESISTANCE TO INSECTICIDES
Author(s) -
TATTERSFIELD F.,
KERRIDGE JILL R.
Publication year - 1953
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1953.tb02390.x
Subject(s) - biology , carbon dioxide , toxicology , stock (firearms) , population , insecticide resistance , zoology , ecology , demography , materials science , sociology , metallurgy
During the selection of a stock of Drosophila melanogaster for resistance to DDT, in which carbon dioxide was used for purposes of anaesthesis, a sensitivity to this gas developed. The phenomena closely paralleled those shown by the CO 2 ‐sensitive ebony stock isolated by L'Héritier and his co‐workers. An experimental analysis of its effect upon DDT sensitivity was made. It was found that a stock selected for CO 2 resistance gave the same probit regression line as the original stock. A CO 2 ‐sensitive stock, whether anaesthetized with nitrogen or carbon dioxide, gave the same regression line at a temperature of 25° C. at which CO 2 sensitivity disappeared, or at 15° C. if adjustment to the proportion of deaths in the control was made. The effect of CO 2 was therefore to limit the population from which selection is made for DDT resistance, rather than to alter the distribution of DDT resistance within the stock.