Potency of Some Synthetic Stimulants and Root Exudates for Broomrape Control

Zararli etkilerinin oldukca buyuk olmasindan dolayi, canavar otlari, ozellikle Solanaceae ve Fabaceae familyalarina ait bazi kultur bitkilerinin en onemli sorunu olarak degerlendirilmektedir. Phelipanche ramosa L. ve Phelipanche aegyptiaca (L.) Pers. Turkiye’de ve diger Akdeniz ulkelerinde daha cok domates uretim alanlarinda sorun olmaktadir. Bu calisma bazi bitki kok salgilarinin ve sentetik stimulant maddelerin, bu canavar otu turlerinin cimlenme oranina etkisini belirlemek amaciyla kontrollu kosullarin saglandigi laboratuvarlarda yurutulmustur. Calismada sentetik cimlenme stimulantlari olarak GR24 (0.1-1 ppm), GR7 (0.1-1 ppm) ve GA3 (10 ppm), kok salgisi olarak keten, pamuk, soya, fasulye, bezelye, borulce, domates, mercimek, hiyar ve tutun fideleri kullanilmistir. Calismadaki sentetik stimulant maddeler, kok salgilari ile ilk kez bu calismada karsilastirilmistir. Denemelerden elde edilen ortalama sonuclara gore; sentetik stimulantlar ve kok salgilari 1 yasindaki P. ramosa cimlenme oranini sirasiyla % 50-77 ve 0 - 16 arasinda artirirken, 3 yasindaki P. aegyptiaca icin elde edilen ortalama degerler % 62-95 ve 0-63 arasinda olmustur. Sonuc olarak, sentetik stimulant maddelerin canavar otlarinin cimlenme oranini onemli derecede artirdigi belirlenmistir. Due to their huge harm effects, broomrapes ( Orobanche / Phelipanche spp) are considered the biggest problem of some cultivated plants especially belong to Solanaceae and Fabaceae families. Phelipanche ramosa L. and Phelipanche aegyptiaca (L.) Pers. cause big problem especially in tomato grown areas in Turkey and the other Mediterranean countries. This study was conducted to determine the effect of some synthetic stimulant substances and root exudates on the germination rate of the broomrape species in controlled laboratory conditions. In this study GR24 (0.1-1 ppm), GR7 (0.1-1 ppm) and GA3 (10 ppm) were used as synthetic germination stimulants; flax, cotton, soybean, bean, pea, cowpea, tomato, lentil, cucumber and tobacco seedlings were used as exudates. The synthetic stimulants were compared with the root exudates for the first time in this study. As a result of the studies it was determined that synthetic stimulants significantly increase the germination rate of Phelipanche species. According to average results of the trials; synthetic stimulants and root secretions increased the germination rate of P. ramosa at one years of age between 50 - 77 and 0 - 16 respectively, otherwise average datas for P. aegyptiaca at three years of age are between 62 - 95 and 0 - 63. As a result of the studies it was determined that synthetic stimulants were significantly increased the germination rate of Phelipanche species.