Weed seeds may be picked up on the tires of vehicles and then spread across the landscape.
Weed seeds in the soil will not be affected by this product and will continue to germinate.
Weed seeds can also survive inside manure and as a result, weeds problems occur in the field.Well decomposed FYM can solve many crop growth problems in the fields.
Weed seeds and unground and uncrushed fruits containing alkaloids, glucosides or other toxic substances separately or in combination including— Datura sp.
Weed seeds" include the seeds of all plants gener- ally recognized as weeds within this state, and includes the seeds of prohibited and restricted noxious weeds as deter- mined by regulations adopted by the department.
The U.S. Department of Justice’s Weed and Seed program was developed to demonstrate an innovative and comprehensive approach to law enforcement and community revitalization, and to prevent and control violent crime, drug abuse, and gang activity in target areas. The program, initiated in 1991, attempts to weed out violent crime, gang activity, and drug use and trafficking in target areas, and then seed the target area by restoring the neighborhood through social and economic revitalization. Weed and Seed has three objectives: (1) develop a comprehensive, multiagency strategy to control and prevent violent crime, drug trafficking, and drug-related crime in target neighborhoods; (2) coordinate and integrate existing and new initiatives to concentrate resources and maximize their impact on reducing and preventing violent crime, drug trafficking, and gang activity; and (3) mobilize community residents in the target areas to assist law enforcement in identifying and removing violent offenders and drug traffickers from the community and to assist other human service agencies in identifying and responding to service needs of the target area. To achieve these goals, Weed and Seed integrates law enforcement, community policing, prevention, intervention, treatment, and neighborhood restoration efforts. The Weed and Seed program is being implemented in more than 150 communities across the country.
National Weed and Seed Program — U.S. Department of Justice, Executive Office for Weed and Seed
The Executive Office for Weed and Seed (EOWS) within the Office of Justice Programs is responsible for overall program policy, coordination, and development. EOWS also serves to enhance the law enforcement and prosecution coordination among Federal, State, and local agencies, and coordinates with other cooperating programs and agencies such as Ameri-Corps, Empowerment Zones/Enterprise Communities, and the Comprehensive Communities Program.
Results: The emergence patterns of the four species were described in an earlier article (see emergence patterns). The fate of the seeds (emergence, loss or survival in soil) during the first four years after burial is shown in Figure 1. In the first year following burial waterhemp had the lowest emergence (5%) whereas greatest emergence was seen with woolly cupgrass (40%). Total emergence over the four years ranged from 300 seedlings (15% of seed) for waterhemp to 1020 seedlings (51%) for woolly cupgrass. More than three times as many seedlings emerged in the first year than in subsequent years for velvetleaf, woolly cupgrass and giant foxtail, whereas 140 waterhemp seedlings emerged in 1996 compared to only 100 in 1995.
So what does this mean as far as managing weeds in Iowa. First, consider how the methods used in this experiment might influence the results. The seeds were buried in the upper two inches of soil, the zone most favorable for germination. Most long term studies investigating the persistence of seeds have buried the seeds at greater depths than used here in order to minimize germination. If the seeds were buried deeper one might expect less emergence and greater persistence since the seeds would be at a soil depth with less biological activity. If the seeds had been placed on the soil surface it is likely that there would be more predation, less emergence and shorter persistence.
Figure 1. Fate of seeds during the four years following burial in the upper two inches of soil. Two thousand seeds of each species were buried in the fall of 1994. The area in white represents the number of intact seeds present in the fall of each year, green represents the total number of seeds that produced seedlings during the four years, and the blue represents the total number of seeds lost. Buhler and Hartzler, 1999, USDA/ARS and ISU, Ames, IA.
Seeds of the two grass species were shorter lived than those of velvetleaf or waterhemp. At the end of the third year (1997) no grass seeds were recovered. Somewhat surprising is that waterhemp seed was more persistent than velvetleaf in this study. Velvetleaf has long been used as the example of a weed with long-lived seeds. In the fourth year of the study four times more waterhemp seedlings than velvetleaf emerged and four times more waterhemp seed than velvetleaf seed (240 vs 60) remained in the seed bank.