| Abstrakt: |
Much of the research concerning the effects of insecticides on the surviving members of treated populations has been done with the organochlorine insecticides (Adkisson and Wellso 1962, Afifi and Knutson 1956, Saini and Cutkomp 1966). For example, Moriarity (1968) observed no obvious effects of sublethal doses of DDT or dieldrin in the grasshopper Chorthippus brunneus (Thunberg), and MacCuaig and Watts (1965) found that the production of egg pods by Schistocerca gregaria (Forskål) was not affected by sublethal doses of aldrin and dieldrin and that the progeny were viable. However, Watts (1969) showed that dieldrin can be translocated to the eggs of S. gregaria and can cause death in newly hatched nymphs. Less information is available about some other classes of insecticides such as the phosphates and carbamates, although Ouye and Knutson (1957) reported that house flies, Musca domestica L., which survived treatment with malathion produced fewer eggs and had a shorter lifespan than untreated flies, and Chauthani and Adkisson (1966) found that sublethal doses of azinphosethyl and azinphosmethyl had adverse effects on the weight, longevity, and fecundity of the bollworm, Heliothis zea (Boddie), and the tobacco budworm, H. virescens (F.). |
