PLAMEN MARINOV-SERAFIMOV1; IRENA GOLUBINOVA1; SHTELIYANA KALINOVA2; MARIYAN YANEV2; ANA ILIEVA1
1 Agricultural Academy, Institute of Forage Crops, BG-5800, Pleven, Bulgaria
2 Agricultural University, BG-4000, Plovdiv, Bulgaria
Marinov-Serafi mov, Pl., I. Golubinova, Sht. Kalinova, M. Yanev and A. Ilieva, 2017. Allelopathic activity of some parasitic weeds. Bulg. J. Agric. Sci., 23 (2): 219–226
Allelopathic activity of Cuscuta epithymum L. (CVCEY), Cuscuta campestris Yuncker (CVCCA), Phelipanche ramosa(L.) Pomel (ORARA), Phelipanche mutelii (Schultz) Reuter (ORARM) and Phelipanche spp. (PHESS) on germination and initial development of test plants of Lactuca sativa L. cultivar “Great Lakes” was studied under laboratory conditions. It was found, that water exracts of the researched parasitic weed species in concentrations 0.4, 0.8, 1.6, 3.2, 6.4 and 12.8% w/v have a relatively high inhibitory effect on the seed germination of the test plant. The inhibiting rate of parasitic weed species from family Convolvulaceae ranges from 6.24 to 100.0% and for the species of family Orobanchaceae from 42.1 tо 100.0%. Parasitic weed species from family Orobanchaceae [Ph. ramosa, Ph. mutelii and Phelipanche spp.] showed a considerably stronger allelopathic effect (GIaverage 17.9), as compared with the applied concentrations of water exracts of species from family Convolvulaceae [C. epithymum and C. campestris] (GIaverage 22.7).