Allelopathic effects of Medicago sativa L. and Vicia cracca L. leaf and root extracts on weeds

PubMedID: 19086510In this study, the allelopathic potential of different concentration (5, 25 and 50%) of M. sativa and V. cracca leaf and root extracts were evaluated on germination and radicle length of four weed species (Amaranthus retroflexus L., Lolium perenne L., Ipomoea hederacea L. and Portulaca oleracea L.) in laboratory condition. As a result, germination and radicle length of all species were reduced by the extract from M. sativa and V. cracca leaf and root at different percentage. Increasing the water extract concentrations from 5 to 50% of test plants parts significantly increased the inhibition of all weed species germination and radicle length. © 2007 Asian Network for Scientific Information

Investigation on weed control methods in citrus orchard in Cukurova Region-Turkey

The experiment was conducted in citrus growing areas in the Cukurova Region in 2002-2003, efficiencies of cultivator, glyphosate treatment and different cover crops (Vicia sativa L. (Common vetch) and V. villosa Roth. (Hairy vetch) have been investigated for controlling weeds, which is a considerable problem in citrus orchards. Experimental plots were arranged in a randomized complete block design with four replications and the plots size were from 2 to 40 m in orchard. Results of the studies showed that, me cover crop (V. sativa) was the most efficient method providing 2.95% efficacy in orchard (3 years old) than the other control methods. Weed coverage percentage of V. villosa, cultivator and glyphosate were determined 4.08, 18.40 and 18.85%, respectively In me case of general weed cover, no significant differences were observed between the weed control efficiencies of cultivator and glyphosate, cover crop treatments with V. sativa L. and V. villosa Roth. in the citrus orchard. General weed coverage was negatively correlated with the coverage of cover crops. During the observations, 63 weed species have been found in the citrus orchard. Fumaria officinalis L. was dominant species in this orchard. © 2007 Asian Network for Scientific Information

Evaluation of common vetch (Vicia sativa L.) as living mulch for ecological weed control in citrus orchards

Weeds are one of the most important problems in newly established orchards. Especially in organic orcharding, the importance of weed management is much more than conventional orcharding. Therefore, importance of alternative methods to chemical control of weeds is increasing. This study was conducted to quantify the effects of common vetch (Vicia sativa L.) as living mulch on weeds and evaluate the availability of common vetch in organic citrus production. The study was carried out in Mandarin orchard which was established specially for this research in research and implementation area of the Plant Protection Department of Çukurova University in Turkey, in a three-year-period. Living mulch and control plots were placed between rows in newly established mandarin orchard and plots were maintained at the same locations until the end of the experiment. In this study, effects of the living mulch application on density, cover proportion, biomass, dry weight and similarity index of weed species were investigated. Overall three-years results of the study were evaluated, living mulch application reduced weed density and cover proportion average of 42.8% and 45.9% respectively compare to control. Biomass and dry weight of weeds were also reduced by living mulch in all years of the experiment. The results indicate that living mulch application by common vetch is an important alternative weed suppression method for ecological weed management. ©2011 Academic Journals

Density and dynamics of Acroptilon Repens L., patches in Turkey

Acroptilon repens is an herbaceous perennial that propagates by seeds and vegetative means. Its natural range extends from Turkey throughout Central Asia to China. A. repens is a major weed for grape, orchards and meadow area in Central of Turkey. Our objective was to determine density and expanding of A. repens patches in Central of Turkey. The patche experiments were conducted for an 6 undisturbed meadow in 2002-2003. Six of 1×1=1 m2 plots were randomly selected in each patch (2 central (C), 2 middle (M) and 2 edge (E). Shoot density and height of A. repens were recorded at two different times (May and August) and also, fresh-dry weight and patch growth were recorded in August for each of the years from each plots The results of the 6 patches experiments for shoot height of A. repens in 2002 and 2003 ranged from 24.94 -31.33 cm and 19.31-25.41 cm plot-1, respectively. In addition to this, the shoot density of A. repens in 2002 and 2003 ranged from 5.83-26.83 shoot plot-1 and 7.50-24.83 shoot plot-1, respectively. The shoot density of A. repens was higher in central plot than the edge plot in 2002-2003. The patches of A. repens in Goreme1, Urgup 1, Urgup 3 and Urgup 4 in 2002-2003 were extended totaly 5, 16, 9 and 12 shoot plot-1, respectively

Population density and reproductive output of Acroptilon Repens L., in Turkey

Acroptilon repens of the family Asteraceae L., is a rhizomatous perennial, extends from Turkey throughout Central Asia to China. A. repens is a major weed in vineyards, orchards and meadows in Central Turkey. Our aim was to describe the population density of A. repens patches in Central of Turkey. The patch experiment was conducted in 15 undisturbed meadows in 2003. Six 1 m2 plots were placed in each patch, 2 in the centre (C), 2 halfway between the centre and the edge (M), and 2 at the edge of each patch (E). Twenty capitula were randomly selected from each plot to record the number of healthy and undeveloped seeds as well as the number of seeds damaged by herbivores. Population density of A. repens was recorded in August when the plant was mature. Mean shoot density of the 15 A. repens patches in 2003 was 12.14 m-2. The capitula density per shoot ranged 4.20- 229.60 plant-1. The relationship between mean number of capitula per shoot and shoot density in A. repens were found negative correlation. The number of seeds per capitula of A. repens was on average 52.36 and ranged from 12.06-24.31