Medicinal and aromatic plants with allelopathic effect are a potential source of natural herbicides. The experiment was conducted in order to assess herbicidal meadow sage (Salvia pratensis L.) on germination growth weed species velvetleaf (Abutilon theophrasti Med.) common corn-cockle (Agrostemma githago L.). Water extracts from S. dry biomass different concentrations were evaluated under cont...

Choice tests were conducted to determine feeding preferences of European corn borer, Ostrinia nubilalis (Hübner) (Lepidoptera: Crambidae), neonates for 15 species of plants. Percentage of neonates accepting (found on) each leaf disc after 24 h was measured using choice tests. Initially, nine species of plants were evaluated. The following year, 10 plant species were evaluated during O. nubilali...

June 23, 2000 Deciding whether a specific weed infestation is worth treating is usually based on a subjective evaluation of the potential impact of the infestation on crop yields. The two main criteria used are 1) the number of weeds present, and 2) the specific weeds present (foxtail, velvetleaf, etc.). Another factor that is just as important, if not more so, is the emergence date of the weed...

The purpose of the itor and evaluate tho liothil virescem (F.), Helicoverpa ua (~ b'eatment with an Hr mine if and to what e) tions of this pest com b'eatmenL Here we ( mone trap counts frol ing) generation throug tion F i; we compare species in the b'eate. with the b'eated plot menL Results for Fi cotton and other host ways to improve effe( For H. virelcens ant most valuable measu current econ...