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Boll weevil traps baited with Grandlure pheromone dispensers and dichlorvos (DDVP) dispensers are integral in the effort to eradicate the boll weevil from the United States and Latin America. The Plato Boll Weevil Trap, previously known as the S & S Boll Weevil Trap, has been in operational use in U.S. Boll Weevil Eradication Programs for four years. The Plato Trap offered 26 design modifications that were key improvements compared to the USDA model as manufactured by Precision Plastics. Between the 2003 and 2004 seasons several additional design changes were integrated into the design of the Plato Trap. These changes improved the strength of the capture cylinder and improved the locking feet of the trap cylinder. All of the changes and improvements result in time and cost efficiency improvements of the trap when in operational use. In 2004, the Plato Boll Weevil trap was compared to a new plastic trap manufactured by Technical Precision Plastics of Mebane, NC. The data illustrated no differences in trap captures observed. Field tests were conducted in 2003 in Northeast Texas, the Texas Rio Grande Valley and Arkansas to ascertain if an alternative base color would improve weevil captures. The capture results with an experimental yellow base cup were equal to the commercial green (yellow-green) base cup of the Plato Trap; however, trappers reported that the alternate color was more easily seen at distances than the commercial trap. In 2004, an alternative reflective yellow base was evaluated with inconclusive results. [ABSTRACT FROM AUTHOR]

In three separate replicated field trials, extended-release pheromone dispensers containing various combinations of Grandlure, eugenol, and DDVP (dichlorvos) were compared for efficacy to attract boll weevil (Anthonomus grandis Boh.) adults to the Plato Boll Weevil Trap®. Dispensers containing Grandlure and eugenol performed better in attracting boll weevils than Grandlure dispensers without eugenol. Dispensers combining Grandlure, eugenol and DDVP into a single dispenser demonstrated performance equivalent to separate Grandlure+eugenol and DDVP dispensers. Extended-release dispensers containing 25-mg of Grandlure captured similar numbers of weevils when changed at either 21-day or 28-day intervals; however, most boll weevil eradication programs will operate on a 21-day interval during post-eradication. The use of dispensers combining Grandlure and DDVP or Grandlure, eugenol, and DDVP are a viable approach to reducing costs associated with active or post-eradication boll weevil eradication programs. [ABSTRACT FROM AUTHOR]

Boll weevil traps baited with Grandlure pheromone dispensers and dichlorvos (DDVP) dispensers are integral in the effort to eradicate the boll weevil from the United States and Latin America. The Plato Boll Weevil Trap, previously known as the S & S Boll Weevil Trap, has been in operational use in U.S. Boll Weevil Eradication Programs for four years. The Plato Trap offered 26 design modifications that were key improvements compared to the USDA model as manufactured by Precision Plastics. Between the 2003 and 2004 seasons several additional design changes were integrated into the design of the Plato Trap. These changes improved the strength of the capture cylinder and improved the locking feet of the trap cylinder. All of the changes and improvements result in time and cost efficiency improvements of the trap when in operational use. In 2004, the Plato Boll Weevil trap was compared to a new plastic trap manufactured by Technical Precision Plastics of Mebane, NC. The data illustrated no differences in trap captures observed. Field tests were conducted in 2003 in Northeast Texas, the Texas Rio Grande Valley and Arkansas to ascertain if an alternative base color would improve weevil captures. The capture results with an experimental yellow base cup were equal to the commercial green (yellow-green) base cup of the Plato Trap; however, trappers reported that the alternate color was more easily seen at distances than the commercial trap. In 2004, an alternative reflective yellow base was evaluated with inconclusive results. [ABSTRACT FROM AUTHOR]

In three separate replicated field trials, extended-release pheromone dispensers containing various combinations of Grandlure, eugenol, and DDVP (dichlorvos) were compared for efficacy to attract boll weevil (Anthonomus grandis Boh.) adults to the Plato Boll Weevil Trap®. Dispensers containing Grandlure and eugenol performed better in attracting boll weevils than Grandlure dispensers without eugenol. Dispensers combining Grandlure, eugenol and DDVP into a single dispenser demonstrated performance equivalent to separate Grandlure+eugenol and DDVP dispensers. Extended-release dispensers containing 25-mg of Grandlure captured similar numbers of weevils when changed at either 21-day or 28-day intervals; however, most boll weevil eradication programs will operate on a 21-day interval during post-eradication. The use of dispensers combining Grandlure and DDVP or Grandlure, eugenol, and DDVP are a viable approach to reducing costs associated with active or post-eradication boll weevil eradication programs. [ABSTRACT FROM AUTHOR]