The influence of water brownification (an increase in color) on floating-leaved macrophytes appears to be an important issue predicting the consequences climate change freshwater ecosystems. To fill gap knowledge this area, we performed a laboratory experiment aiming test impact humic acid (HA) Lemna minor sampled from oxbow lake. Plants were exposed over seven days four different additions pur...

in order to assay the pathogenicity of the entomopathogenic nematode, heterorhabditis bacteriophora poinar, 1975 on the indigenous population of common earwig, forficula auricularia l., several concentrations including 100, 250, 500, 1000, 1500, 2000 and 3000 (ijs/ml of dw) were used in the laboratory conditions. in this experiment, effects of time (f 1, 91= 4.22, p

the effects of environmental factors on germination and emergence of hoary cress seeds were examined in laboratory and field experiments. germinability of hoary cress under light/dark conditions (90%) was significantly higher than when seeds were incubated under continuous dark (78%). hoary cress could germinate in a broad range of temperatures (15/6, 20/10, 25/15, 30/15, and 35/20?c). the germ...