Seasonal changes in the germination responses of buried Witchgrass
(Panicum capillare) seeds.
A thick mulch of hay, straw or seaweed (which asparagus loves) will minimize annual weeds, add fertility as it decomposes, and give protection in winter, but it will not deter witchgrass
, dandelions, wild blackberries and other stubborn invaders.
Important grasses included spidergrass (Aristida ternipes), purple three-awn (Aristida purpurea), cane bluestem (Bothriochloa barbinodis), six-weeks grama (Bouteloua barbata), sideoats grama (Bouteloua curtipendula), Rothrock's grama (Bouteloua rothrockii), feather fingergrass (Chloris virgata), bush muhly (Muhlenbergia porteri), witchgrass
(Panicum capillare), whiplash pappusgrass (Pappophorum vaginatum), and sand dropseed (Sporobolus cryptandrus), all of which are believed to provide both hiding cover and food.
Several other common weeds in orchards and vineyards, including Palmer amaranth (Amaranthus palmeri), three-spike goosegrass (Eleusine tristachya) and witchgrass
(Panicum capillare), are suspected to have evolved resistance to glyphosate; preliminary research trials by UC researchers and California State University, Fresno, collaborators have been initiated to verify and characterize the putative resistant populations.
Of the main annual grass weeds present in New Zealand maize crops , nicosulfuron provided good control of smooth witchgrass
(Panicum dichotomiflorum) and barnyard grass (Echinochloa crus-galli) and suppression of most other annual and perennial grasses as well as many broadleaf weeds [12,4].
Lamb's quarters, chicory, witchgrass
, watercress, along with dandelion were commonly eaten.