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Sto. Domingo, Costa Rica

Oehlschlager A.C.,ChemTica Internacional
Journal of Chemical Ecology | Year: 2016

Male-produced aggregation pheromones of seven major pest species of weevils in the subfamily Rhynchophorinae have been identified as a closely related set of methyl-branched secondary alcohols. Although the weevils produce only one stereoisomer of these alcohols, no instances of isomeric inhibition have been observed, enabling stereoisomeric mixtures to be used in traps. Addition of fermenting plant material to traps synergizes attraction of weevils to the pheromones. The weevils are large, have long life cycles, and are strong fliers. These characteristics make mass trapping a suitable tactic to add to existing management strategies. When coupled with good phytosanitary practices, mass trapping of Rhynchophorus palmarum at 1 trap/5-ha significantly lowered the incidence of red ring nematode infection vectored by the weevil in commercial oil palm plantations in the Americas. Similarly, trap densities of 1–10 traps/ha have significantly lowered R. ferrugineus infestation of date palm throughout the Middle East. Although management of R. ferrugineus in urban areas is more problematic, trapping is an integral part of most programs aimed at protection of ornamental Canary palms in Europe. Overall, semiochemically-based management of these large weevils is now a mature and usually economically feasible control technology. © 2016 Springer Science+Business Media New York

Oehlschlager A.C.,ChemTica Internacional
Acta Horticulturae | Year: 2010

Pheromone trapping of RPW is an effective method to manage populations of this palm pest. Current pheromone lures last for 2 to 5 months depending on the season, but the necessary food component lasts only for a week or two. Water evaporation and loss of attractancy are the two main problems with the food component. This paper will present work done on a related species Rhynchophorus palmarm aimed at making the food component of the trap more attractive as well as adding ingredients to the trap to extend the field life of the food. Emission of ethyl acetate from dispensers in pheromone/food traps increases captures compared to pheromone/food traps by 2-5×. Addition of propylene glycol to traps extends the effective life of food in traps. What has not been effective in the field to date is the substitution of attractive blends that attempt to replace food.

Chemtica Internacional | Date: 2014-04-18

This specification generally relates to a method and device for trapping insects that has at least one opening through which insects may enter an entrapment chamber. The specification generally relates to methods to increase the number of insects captured in a trap by having a design that resembles a biological design, such as a plant or flower. The insect trap may have a flower landing ring, a multicolor surface, and/or a flower design on the bag.

Lobos E.,UNSE | Occhionero M.,UNSE | Werenitzky D.,UNSE | Fernandez J.,National University of Tucuman | And 5 more authors.
Neotropical Entomology | Year: 2013

Management of the South American tomato leafminer, Tuta absoluta Meyrick, with insecticides has led to the widespread development of insect resistance. Mass trapping using traps baited with the female-produced sex pheromone is an attractive alternative for the management of this pest. The current study evaluated several commercial trap designs for capture of T. absoluta. Based on its small size and ease of handling, the most effective trap is a small plastic container with entry windows cut on the sides filled with motor oil over water. These traps are most effective when placed near ground level. Tests of septa containing 0.1 or 0.2 mg of the pheromone (95:5) E4, Z8-14Ac/E4,Z8,Z11-14Ac were slightly more attractive than septa loaded with 0.5, 1.0, or 2 mg during the first week of use, but the latter three loadings were slightly more attractive than the first two loadings after 9 weeks. Ideal trap baits were loaded with 0.5 mg of pheromone. Higher numbers of T. absoluta were captured near upwind borders of tomato fields suggesting that treatments against T. absoluta should be concentrated near upwind parts of fields. Comparisons of conventional insecticide treatment versus mass trapping to manage T. absoluta damage in three different test sites showed that even when initial captures in monitoring traps were high (>35 males trap-1 day-1), mass trapping at 48 traps/ha reduced leaf damage more efficiently than conventional insecticide treatment. Based on the typical insecticide recommendations against T. absoluta, mass trapping is an economically viable alternative. © 2013 Sociedade Entomológica do Brasil.

Alpizar D.,Ministerio de Agricultura | Fallas M.,Ministerio de Agricultura | Oehlschlager A.C.,ChemTica Internacional | Gonzalez L.M.,ChemTica Internacional
Journal of Chemical Ecology | Year: 2012

Mass trapping Cosmopolites sordidus (Coleoptera, Curculionidae) using a pheromone-baited pitfall trap and Metamasius hemipterus (Coleoptera, Curculionidae) using a pheromone-sugarcane-baited open gallon trap was conducted in commercial banana. Four traps for each insect per hectare were placed in each of two 5-hectare plots of banana. Two additional 5-hectare plots were designated as controls and treated according to the plantation protocol. Capture rates of C. sordidus and M. hemipterus declined by >75 % over 10-12 months. In the banana growing region studied, corm damage was due primarily to C. sordidus, while only a minor amount of damage was attributable to M. hemipterus. Corm damage reduction in trapping plots was, thus, attributed primarily to C. sordidus trapping. In trapping plots, corm damage decreased by 61-64 % during the experiment. Banana bunch weights increased 23 % relative to control plots after 11-12 months of trapping. Fruit diameter did not vary between bunches harvested from trapping plots vs. control plots. Plant vigor, however, as determined by stem circumference at one meter above ground increased in plots with traps compared to control plots. Trapping for C. sordidus in two plantations of over 200 hectares each, reduced corm damage 62-86 % relative to pre-trapping levels. Insecticide control measures in place when the experiment commenced resulted in about 20-30 % corm damage, while use of pheromone trapping to manage C. sordidus lowered corm damage to 10 % or less. It is estimated that the increase in value of increased yield obtained in this trial (23 %) is about $4,240 USD per year per hectare, while the cost of pheromone trapping is approximately $185 USD per year per hectare. The trapping program becomes revenue neutral if bunch weights increase by an average of 1 % per year of trapping. Approximately 10 % of all plantation area in Costa Rica use the pheromone trapping system described here. The system also is used in Martinique, Guadeloupe, and the Canary Islands. © 2012 Springer Science+Business Media, LLC.

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