Tuta absoluta is the major insect invading tomato crop under greenhouse and open field conditions in Lebanon. Farmers mainly depend on chemical control to reduce damage caused by the larva. The hazard use of chemical agents can lead to resistance accumulation. The objective of this study is to investigate alternative agents like biopesticides to control this pest. Two field trials were conducted at the Lebanese Agricultural Research Institute (LARI) for two years under greenhouse conditions. In 2014, the first trial was conducted in two greenhouses: 1-control greenhouse without insect proof net (CG); 2-double door Greenhouse with insect proof net (DDG). In 2015, the second trial was conducted only in control greenhouse.Four treatments and control (not treated plot) were adopted in both trials. The biopesticides used in this study were Neem azal and Bacillus thuringiensis. Results of the first trial showed that using insect proof net reduced the captured adults on the water trap as compared with control greenhouse and thus reducing the damaged caused by the larva of tomato leaf miner on leaves and fruits. The adopted treatments have shown significant differences in the number of mines/leaf, live larva/leaf and percent of damaged fruits in both trials compared to the control. Applying Bacillius thuringiensis and neem azal separately and mixing them together have shown a promising alternative method to chemical control.

The titanium role in plants nutrition is not so far fully clear. Many positive beneficial influences and a few adverse influences of titanium addition are described in literature. The purpose of this investigation is to study the effect of different rates of Ti soil application on the plant growth parameters, chemical constituents, quality parameters and elements concentration in the soil after harvesting of lettuce plants grown on sandy soil with irrigation by H. Cooper's nutrient solution during the winter season of 2017/2018. The experimental design was randomize complete block with four replicates for each treatment. The titanium application rates were: (T 1 ) 0 ppm, (T 2 ) 25ppm, (T 3 ) 50 ppm and (T 4 ) 75ppm, added as Titanium dioxide (TiO 2 ). The results showed that, the values of all studied growth parameters of lettuce plant significantly increased with raising of titanium addition from 0.0 to 25 ppm and then significantly decreased with any increase in titanium dioxide. The same trend was found for N, P, K, Fe, carotein, vitamin C, chlorophyll a, b and total chlorophyll. On the contrary, of above trend; sharply and significantly decreases were happened in the mean values of nitrate (NO 3 -N) and nitrite (NO 2 -N) in lettuce leaves. For Ti concentration, the values significantly increased with increasing Ti application rates.