Growers avoid sites infested with nutsedge, quackgrass
, or persistent problem weeds and spray problem weeds with herbicides before planting the strawberries.
lobata Leafy spurge Euphorbia esula Invasive and noxious Mile-a-minute weed Polygonum perfoliatum Invasive Multiflora rose Rosa multiflora Invasive Musk thistle, Carduus nutans Invasive and nodding thistle noxious Purple loosestrife Lythrum salicaria Noxious Quackgrass
Agropyron repens Noxious Russian knapweed Acroptilon repens Invasive Russian olive Elaeagnus angustifolia Invasive Saltcedar Tamarix spp.
Examples of creeping perennials are quackgrass
, nutsedge, and white clover.
Weeds such as quackgrass
and Canada thistle will grow through several inches of mulch and generally need to be removed by hand.
One common complaint about Earth-friendly weeding techniques is that they aren't effective at fighting pernicious weeds such as Canada thistle, quackgrass
or morning glory, which can burrow 20 feet into the earth and has seeds that can remain active for up to 50 years.
Important weeds that pose a threat to horticultural crops include dandelion, Canadian thistle, field bindweed, common lamb's-quarter, Johnsongrass, quackgrass
, common cocklebur, and large crabgrass.
Some of the most common weeds are dandelions, thistle, pigweed, lambsquarters, clover, milkweed, ragweed, purslane, velvetleaf, and various grasses--in particular, crabgrass and quackgrass
NewHy-RS hybrid wheatgrass resulted from hybridization between quackgrass
and bluebunch wheatgrass [Pseudoroegneria spicata (Pursh.
Examples include dandelion, quackgrass
, clover, and nutsedge.
allelopathic aglycons in quackgrass
For example, the new genes could increase the invasiveness (or weediness) of the plant in fields, or proteins derived from the quackgrass
genes could be toxic or allergenic to consumers.
roots, for instance, until completely decomposed, may slow the growth of crop plants.
(Agropyron repens) was far more consistent in the two areas.
The type of weeds that are easier to control with spraying include crabgrass and quackgrass
Hagin found that one of these, quackgrass
, leaves behind a substance that kills alfalfa seedlings when the quackgrass
itself is killed.