@article{Emerson:148092,
      recid = {148092},
      author = {Emerson, Peter M. and Plato, Gerald E.},
      title = {SOCIAL RETURNS TO DISEASE AND PARASITE CONTROL IN  AGRICULTURE: WITCHWEED IN THE UNITED STATES},
      journal = {Agricultural Economics Research},
      address = {1978-01},
      number = {1489-2016-125718},
      pages = {8},
      year = {1978},
      abstract = {This study provides ex ante estimates of the value to  society of the U.S. Department of Agriculture's witch· weed  program. Program objectives are to contain and eradicate  witchweed, a semiparasitic plant which reduces corn and  grain sorghum yields. Critical elements which determine the  social value are cost of the program, price elasticities of  supply and demand, and shifts in supply occurring in the  absence of a program.},
      url = {http://ageconsearch.umn.edu/record/148092},
      doi = {https://doi.org/10.22004/ag.econ.148092},
}