The historical effects of El Nino/La Nina events on supplies of selected fresh vegetables and melons (
Cucumis meloL.) were evaluated by estimating single-equation supply relationships. Economic variables in the estimated equations were, generally, of the correct sign and significant at usual levels. El Nino events had a negative and statistically significant effect on the Texas muskmelon, Florida fall squash [ Praecitrullus fistulosusStocks) Pang.] and the California fall lettuce ( Lactuca sativaL.) supply with expected production declines of 15%, 21%, and 5% relative to historical mean production. In contrast, the expected supplies of United States summer onions ( Allium cepaL.) and Florida fall and winter tomatoes ( Lycopersicon esculentumMill.) increased about 7%, 10%, and 25% during El Nino events. La Nina events had a negative and significant effect on Texas muskmelon, honeydew, and watermelon, with supplies expected to decline 20%, 29%, and 13% with the occurrence of this event.