الفهرس 
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Abstract
The tomato leaf miner (TLM), Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is a new exotic invasive pest in Egypt and is considered one of the most economically destructive pest of tomato and other solanaceous plants worldwide. The main objectives and results of the current study are presented as follow: 1) The effects of temperature on the biological attributes of TLM were studied at five constant temperatures (15, 20, 25, 30 and 35°C). Total developmental time was negatively correlated to the increase of temperature being longest (67.67 days) at 15°C and shortest (14.42 days) at 35°C. The mean total lifetime fecundity of TLM females was 13.92, 211, 244.17 and 177.83 eggs at 15, 20, 25 and 30°C, respectively. The population of TLM reared at 30°C had the highest intrinsic rate of increase (0.75), net reproductive rate (28.28), shortest population doubling time (0.93 days) and mean generation time (4.49 days), 2) Four egg parasitoids (Trichogramma cacoeciae, T. evanescens, T. pretiosum and Trichogrammatoidea bactrae) were evaluated as potential bioagents for controlling TLM. Tr. bactrae was the most effective parasitoid against TLM as indicated by the higher percentages of parasitism followed by T. evanescens and T. cacoeciae. T. pretiosum, on the other hand, was the least effective parasitoid against TLM. Also, rates of parasitism in TLM eggs increased as increasing parasitoid density, but decreased as distance from parasitoid releasing point increased, 3) Five biorational insecticides (Coragen, Proclaim, Match, Spintor and Dipel 2X) were tested against TLM under laboratory and field conditions. Coragen, Proclaim and Spintor showed high toxicity with subsequent significant reduction in the infestation of TLM. Match and Dipel 2X were less toxic to TLM and 4) The toxicity of these insecticides to the four egg parasitoids was also evaluated using three standard methods. Results showed that exposing parasitoid females either to insecticide-treated or non treated-TLM eggs reduced rates of parasitism and parasitoid emergence. Exposing parasitoid adults to the residues of Spintor, Proclaim and Coragen caused higher rates of mortality in all parasitoids. Subsequently, Spintor, Coragen and Proclaim were highly toxic to the four tested egg parasitoids. While Match was moderately.