Volume 10, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Summary and Conclusions

Parent and hybrid populations of dieldrin resistant (El Salvador) and susceptible (Panama) were tested for resistance by exposing 2- to 3-day-old adults to the World Health Organization dieldrin-impregnated test papers. At 0.4 and 0.8% concentrations, the mortalities of the above populations were about 5 and 98%, respectively, while those of the F hybrids were somewhat less than those of the resistant El Salvador parent strain. Mortalities of the F and backcross populations in general agreed with those expected on the basis of monofactorial inheritance.

It is concluded that in our laboratory populations, the ability to survive 2-hour contact with dieldrin on the part of 2- to 3-day-old, sugar-fed adult males and females is inherited as a simple factor, with resistance completely dominant over susceptibility.


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