Biological control has primarily focused on insects that attack the flower heads. Only two insects have proven somewhat effective, including the hairy weevil and the false peacock fly , having been reported to reduce seed production . Revegetation with native or introduced grasses, legumes, or other forbs is an important component of long-term yellow starthistle management.Methods […]
Author: mobilegrow
The plant usually matures and sheds its windblown seeds from late July to October
Recovery times tended to be longer for R. crispus compared to other weed species, particularly when fed to growing heifers .All main effects and their interactions were significant for the seed viability and recovered viable seed measured over the four consecutive dates . The highest value of total recovered viable seed was observed with S. halepense when […]
Genes can be transferred among varieties or closely related species by gene flow or seed mixtures
Although currently there are no standards in the United States to separate government-approved biotechnology traits, 1 percent adventitious presence has been suggested as the standard for adventitious presence of biotechnology-derived traits in non-transgenic varieties of seed crops in export markets. Handling of RR alfalfa seed may also require additional checks in place to prevent co-mixing […]
Final lengths for the cultivars at the deepest planting were telling
Given the high germination rates for all cultivars, the consistently greater index for M-209 reflects a greater degree of apparent vigor for that cultivar. Greater than 75% of seedlings emerged from 2.5 cm, 5.1 cm, and 7.6 cm planting depths after 8 DAP, 10 DAP, and 14 DAP, respectively. Consequently, below-soil elongation data reported are […]
The labeled nitrogen solution was added to the soil via syringe injection
The restoration of urban creek ecosystems is tremendously challenging: human community needs , heavy pollutant inputs, hydrologic alterations, and frequent disturbance complicate management and make many noble restoration goals infeasible . One significant challenge that many restoration projects face is that of invasive non-native plant species , an issue that can be particularly pronounced in urban […]
The combined stress of drought and heavy grazing will significantly diminish plant vigor
This one application will provide 4 to 6 years of adequate sulfur nutrition to the new pasture plants. Visible symptoms of sulfur deficiency include stunting and yellow color, although these symptoms also commonly indicate nitrogen deficiency. If you suspect sulfur deficiency after pasture establishment, cut the top 4 to 6 inches off of leaves at […]
Crested wheat grass is the best choice for dry sites with sandy or shallow soils
A popular species may have several desirable characteristics, but if it is not well-adapted to the site, there is little chance for successful establishment. Annual precipitation is the most common determining factor for which species will successfully establish and persist on a given site. Do not select a species that requires more annual precipitation than […]
CARB is currently taking public comments on an updated clean trucks plan that is even more ambitious
Original equipment manufacturers have identified an emerging market for BE MHDVs, advertising them to fleet operators as an opportunity to reduce operating and maintenance costs and their ecological footprint. While environmental benefits of BEVs are broadly appreciated, they can vary substantially depending on complex interactions between vehicle behavior , the physical environment , as well as characteristics […]
Weedy rice is a noxious weed that causes tremendous yield losses for cultivated rice worldwide
As mentioned above, one of the major bio-safety concerns regarding the field release of GE rice at the scale of commercial production is transgene flow from GE rice varieties to its wild and weedy relatives . The primary bio-safety concern is that transgenes introgressing into the weedy rice populations that grow intermixed with cultivated rice […]
Sorghum also has high potentials for development as a bio-energy feedstock
If humans select crops that grow densely in monospecific stands, are those plants only a few allele changes away from becoming invasives or weeds ? If such is the case, careful and thorough evaluation should accompany the development of new crops designed to answer pressing societal needs, including new bio-energy feedstocks created with the goal […]