Abstract
This study conducted in Plant Protection Department College of Agriculture and Forestry Mosul University in 2020 to know the non_cumulative effect of oil extract of Urtica pilulifera on mortality rate of immature stage of White-fly Bemisia tabaci on cucumber plant in plastic house . The results show that the higher rate of mortality in egg was 24.33% at conc.3% after 72 h.of treatment. And the higher rate of mortality of nymph was 46.33% at conc.3% after 72 h. OF treatment.
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