Similar results of inhibition of the germination process for barnyardgrass caryopses were recorded with the use of aqueous extracts of Secale cereale L.
In general, morningglory seeds had higher germinability and mean germination rate than barnyardgrass caryopses, but this result may be explained by the scarification to which the morningglory seeds were subjected (Figure 3).
In PEG-6000 solutions, 80% of barnyardgrass caryopses germinated at osmotic potentials of 0 and -0.
The maturation stage of Sapindus saponaria leaves interferes with these allelopathic effects, since the young leaf extract demonstrated stronger inhibition than the mature leaf extract of the germination process and seedling development of barnyardgrass and morningglory.
The greater proportion of barnyardgrass
in the diet of the white-collared seedeater may reflect the greater abundance of this species over cupgrass and southwestern bristlegrass at Site 2 (Eitniear 1997b).
Using HPLC to predict which accessions of rice will inhibit growth of barnyardgrass
Response of barnyardgrass to selected suppressive rice cultivars in a replacement series study.
Interference interactions of two rice cultivars and their F3 cross with barnyardgrass (Echinochloa crus-galli )in a replacement series study.
Rice cultivar differences in suppression of barnyardgrass (Echinochloa crus-galli) and economics of reduced propanil rates.
Four rice cultivars consisting of Dasth, Nemat, Deylamanie and Number III (Ramzanali Tarom) were applied in main plots and subplots which consisted of split application of weed extracts at seven levels] 1- use of tap water; 2-soluble extracts of Barnyardgrass
(Echinochloa crusgalli); 3- soluble extracts of Umbrella sedge (Cyperus difformis L.