Allelopathy can have an important applicaiton in areas of agriculture, especially in integrated protection from weeds, by using of allelopathic crops in different ways. In this research allelopathic effects of invasive species acacia (Robinia pseudoacacia L.)  and white goosefood (Chenopodium album L.) are explored on germination of   tomato (Solanum lycopersicum L.). Water extracts of dry leaves of white goosefoot and acacia are prepared according tothe  method : Norsworthy (2003). Experiment has been made in controlled laboratory conditions. Results of this research show that acacia and white goosefood have negative allelopathy potential and they act inhibitory on germination of tomatoes. Research of allelopathy and allelopathic relationships of weed species and agricultural cultures represents a big challenge for those people who are working in food production, and at the same time can be an instrument of ecologically sustainable agriculture.

Objective. To assess whether psychosocial support of the School Projectof the Humanitarian Society (HS) “Prijateljice (Girlfriends)” hada positive eff ect on reducing posttraumatic consequences in Bosnia-Herzegovina primary and secondary school students, aft er the 1992-1995 war. Subjects and Methods. A stratifi ed sample of 336 students,aged 13.5±1.6 (10 to18) years, in primary and secondary schools, involvedin psychosocial support, were compared with 72 randomly selectedpeers from the same schools, not involved in this project. Datawere collected in December 2005 and in May 2006. Th e Children’sDepression Inventory and the Child Post-Traumatic Stress ReactionIndex were utilized. Statistical analysis involved McNemar’s test, Students’t-test, Chi-square test and Pearson’s correlation test. Results.According to DSM, the prevalence of PTSD and depression amongstudents involved in the School Project, signifi cantly decreased from46.1% to 13.4% and 25.6% to 1.8%, respectively (McNemar’s test,P<0.001; P<0.001, respectively). In the control group the prevalenceof PTSP and depression decreased from 30.5% to 23.6% and 22.2%to 11.1%, respectively, with no signifi cance (McNemar’s test, p=0.332;p=0.077, signifi cantly). Girls had a signifi cantly higher prevalence ofboth PTSD and depression compared to the boys. Age, the numberof traumatic episodes, and suicidal behavior correlated with the intensityof PTSD symptoms and depression symptoms. Conclusions.Psychosocial support within the School Project resulted in a signifi -cant reduction of PTSP and depression amongst the involved studentscompared to the controls. Schools and other institutions ought to envisageas many projects as possible to be implemented in school andout-of-school to assist young people to overcome more easily the consequencesof the war in their development.

BACKGROUND The 1992-1995 war in Bosnia and Herzegovina (BH) has had a tremendous impact on civilians; thousands of inhabitants were left with numerous traumatic experiences. Many children suffered or witnessed horrifying acts of violence and aggression. Although young trauma victims are often resilient, many experience mental health difficulties, including PTSD. The aim of the study was to estimate whether psychosocial support given by the School Project of Humanitarian Association of " Prijateljice" reduced posttraumatic consequences in students in primary and secondary schools in Bosnia and Herzegovina after 1992-1995 war. SUBJECTS AND METHODS A stratified sample of 336 students in primary and secondary schools located in two entities of North-East Bosnia and Herzegovina, involved in psychosocial support, was compared with 72 voluntarily selected same-age students from the same schools who were not involved in this project. Data were collected on two occasions, beginning of December 2005 and end of May 2006, by using a self-evaluation survey method for measuring symptoms of posttraumatic stress disorder (PTSD) according to DSM IV. The Index of Children Post-traumatic reactions were used. RESULTS The severity of PTSD symptoms among students involved in the School Project decreased from (mean+/-standard deviation=35.3+/-10.2 to 26.7+/-8.7) (t=13.1, P<0.001, Paired sample test), whereas in the group with no psychosocial assistance this reduction was from (29.7+/-10.9 to 28.1+/-11.8) (t=0.9, P=0.396, Paired sample test). CONCLUSION This study suggests that work with students by giving them psychosocial support within the School Project resulted in significant reduction of PTSD symptoms' severity.