Economic threshold for geminivirus infections in tomatoes:  September 2003

    Fernando Arturo Juarez Garcia, AgroVida, Salama, Guatemala, coordinator

Growers need a predictive method to determine if it is worthwhile to continue to manage a tomato field.  The development of an economic threshold, which would relate percentage of plants with various DSI at 45 or 60 days with yields, would be one approach.  The technical representatives from AgroVida, Salama, Guatemala are in the process of collect data to prepare information for an economic threshold.

AgroVida and Bayer Crop Science technical representatives are collecting data on plants shown below. This information will be used to create an economic threshold for the growers. Amilcar Lopez Gomez will be responsible for data collection.  He is giving each plant a DSI. Sept. 2003.

Individual tomato plants in four rows are each given a DSI (1 to 4) at 45 and 60 days after transplanting.  Yield from plants with each DSI will be taken and this information used to develop a predictive model for percentage of plants with given DSI and expected yields.  Growers can then make management decisions based on this information.

[Back to Field Tests, September 03] [Breeding tomatoes for resistance to geminiviruses in Guatemala]