This paper described the extraction procedure and determination method for the total flavonoids in ethanol extract from the leaves of Abutilon theophrasti Medic., and evaluated antibacterial and antioxidant activity. Maximum extraction yield was achieved using 60% ethanol, 1 : 30 (g/mL) of a ratio of material to solvent, 20 min of extraction time, 40 kHz of ultrasonic frequency, 100 W of ultras...

We grew velvetleaf (Abutilon theophrasti Medic.) and cotton (Gossypium hirsutum L. var. Stoneville 213) at three irradiances and determined the photosynthetic responses of single leaves to a range of six irradiances from 90 to 2000 mueinsteins m(-2)sec(-1). In air containing 21% O(2), velvetleaf and cotton grown at 750 mueinsteins m(-2)sec(-1) had maximum photosynthetic rates of 18.4 and 21.9 m...

( )-Cryptocaryalactone (6-[2-acetoxY-4-phenyl-3-butenyl}5,6-dihydro-2-pyranone) and ()-deacetylcryptocaryalactone (6-[2-hydroxy-4-phenyl-3-butenyIJ-5,6-dihydro-2-pyranone) isolated from Cryptocarya moschata seeds are natural germination inhibitors. Applied at 0.004 M, the second compound completely arrested germination of velvetleaf (Abulilolllheophrasli) and decreased the germination rate of s...

Invazivna alohtona vrsta europski mračnjak (Abutilon theophrasti Medik.) danas je jedna od najagresivnijih i najštetnijih korovnih u Hrvatskoj. Jakim habitusom s naglašeno velikim listovima vrlo brzo može zasjeniti uzgajanu kulturu uzrokujući značajne gubitke prinosa. Relativno krupno sjeme omogućuje mu nicanje iz dubljih slojeva tla što zbog kontinuiranog nicanja različitih dubina predstavlja ...