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EVALUATION OF THE ROLE OF GAMMA
IRRADITION AND/OR RED GUM PLANT EXTRACT, EUCALYPTUS
CAMALDULENSIS, ON SOME PHYSIOLOGICAL ALM EL-DIN, M.M.S.
Biological Application Department, Nuclear
Research Center, Key words: Inherited sterility, Gamma radiation, Spodoptera littoralis, Plant extract, Food consumption, Eucalyptus camaldulensis. تقييم دور أشعة جاما و/أو المستخلص النباتى للكافور على بعض التغيرات الفسيولوجية لحشرة دودة ورق القطن مجدى محمد شبل علم الدين خلاصـــة ABSTRACT The combined effects of two sub-sterilizing doses (75 and 125 Gy) of gamma irradiation to male full grown pupae of Spodoptera littoralis and / or red gum plant extract, Eucalyptus camaldulensis (Family: Myrtaceae) to the resulting larvae of F1 progeny on the consumption and utilization of food during the fifth and sixth instar larvae were studied. In general, plant extract and gamma irradiation each of them alone or in combination reduced the amount of food consumed and digested by the F1 larvae as compared to the control. The red gum treatment combined with 125 Gy decreased significantly the efficiency of conversion of ingested food (E.C.I.) together with the efficiency of conversion of digested food (E.C.D.) to body substances at the tested treatments when compared with the untreated ones. Also, the food utilization efficiencies decrement led to a significant reduction in weight gain and growth rate. In addition, the deleterious effect of combined treatments on development and growth aspects was recorded. |
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