Allelopathic Activity of Some Parasitic Weeds

PLAMEN MARINOV-SERAFIMOV¹; IRENA GOLUBINOVA¹; SHTELIYANA KALINOVA²; MARIYAN YANEV²; ANA ILIEVA^1
1 Agricultural Academy, Institute of Forage Crops, BG-5800, Pleven, Bulgaria
² Agricultural University, BG-4000, Plovdiv, Bulgaria

Abstract

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 (GI_average 17.9), as compared with the applied concentrations of water exracts of species from family Convolvulaceae [C. epithymum and C. campestris] (GI_average 22.7).

Key words: dodder, broomrape, allelopathic potential, Lactuca sativa L.

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