The study aimed to know the effect of the water and ethanolic extracts of the Ricinus communis and Pituranthos tortuosus on studied bacteria( Klebsiella- Escherichia coli and Staphylococcus epidermidis ). In this study, the plant extract was prepared using a variety of solvents, namely water and ethanol. The experiment was designed randomly and with three replicates and using the spread method around the tablets. A plate of solid food medium Muller hen ton and then added tablets of filter paper saturated with water and ethanol extracts of both plants. The inhibitory potential was studied by measuring the diameter of the halo caused by inhibition of bacterial growth. The results showed that the various extracts had a wide effect on the isolates. Water extract of Ricinus communis were The best extract and the gave high dehydration effect on the all studied bacteria whereas ethanolic extract of Pituranthos tortuosus has a greater effect than the water extract on Klebsiella and Staphylococcus epidermidis.

Several studies have demonstrated antibacterial activity of essential oils extracted from different medicinal plants. This study was conducted to determine the  antimicrobial activity of six kinds from essential oils (Basil oil, Cinnamon oil, Fenugreek oil, Garlic oil, Ginger oil , and, Parsley oil) against three pathogenic bacteria(  Escherichia coli, proteus pseudomonas and Staphylococcus aureus ).The antimicrobial activity was examined using paper disc diffusion method. also four antibiotics [Aoxicicillin 25mg/ml (Amx), ciprofloxacin – 5 mg/ml (cip 5), doxycycline (Do) 30 mg/ml ,  and Streptomycin (5 mg/ml)]  used to compared with essential oils, and may be use  essential oils as an alternative for the treatment of infectious diseases. The present study showed that  the E.coli was more sensitive than other studied bacteria. At high concentrations (20, and 50 µl/l), Basil and fenugreek oils exhibited marked inhibition activity against all studied bacteria, and inhibition of Basil oil was strongest than those of Fenugreek oil. Comparatively, P . pseudomonas ,and S. Aureus was less sensitive to the inhibitory activity of the Cinnamon, Garlic, Ginger, and Parsley oils than E.coli which was more inhibited at same concentrations of essential oils and Ciprofloxacin showed a good effect on the bacteria E. coli .The sensitivity of P. pseudomonas to Doxycycline and Ciprofloxacin corresponded to an average diameter of 12.24,and 12.21mm respectivily. Aoxicicillin was another antibiotic that showed its effectiveness with E. coli whose diameter was 12.31 mm. The results of this study showed that six essential oils has strongly inhibitory effect against E.coli. While weakly inhibitory effect on other  studied bacteria. the comparison between the diameters of the inhibition zones of antibiotics and the dia-meters of the six essential oils shows that E. coli ,S. aureus and Proteus sp are more susceptible to essential oils than antibiotics.

The present study aims to record weeds plants within growing fields of Cucumber, Pepper, Tomato, Lettuce and Onion in Al- Oylia region ,Al-Marj ,Libya. A total number of 41 weed species 16 angiospermic families were found as a rudreal weeds. Maximum number of species (11) belongs to the family Poaceae (Graminaceae) followed by Cruciferea (Brasicaceae)(6) and Asteraceae (Composit) (4) .Aegilopos ventricosa, Centaurea Cyrenaica , were found to be the most frequently occurring weed with relative frequency (RF) 3.75 and 6.42% respectively , absolute frequency,(AF) of 29.2 and 50% respectively,(AD)1.54and 1.75 respectively, and they recorded in most Eight studied fields showing 75% prevalence. Nine species namely Allium roseum, Amaranthus retroflexus,Asphodelus tenuifolius, Avena sativa, Bromus rigidus,Phalaris minor,Phalaris canariensis, Rapistrum rugosum, and Urtica dioica showed 50% prevalence with absolute frequency (AF) ranging from 16.7–33.3% ,and relative frequency (RF) from 2.14–4.27%, and(AD) ranging from0.08-0.83 . The lest frequently occurring specieswith (AF) 8.33% and(AD) from 0.16-50 include six species. According to the frequency, three dominant weed species were found to be Aegilopos ventricosa, Allium roseum and Sinapis alba . Generally,the results in the present study showdominance of the ruderal over the agrestal weeds which may be due to ploughing and cleaning of agricultural soil.