Compatibility of Insecticides, Fungicides, and Foliar Fertilizers on Watermelon

Insecticides, fungicides, and foliar fertilizers are all used in the production of watermelon (Citrullus vulgaris L.) in Florida. In certain areas of the state, particularly in south Florida, pesticides are commonly applied at 5-7 day in tervals to maintain disease and insect control. Growers with large acreages combine insecticides and fungicides so that both can be applied at the required short interval. In addition, materials are combined simply to save the time and labor required to make separate applications. Several pesticide-nutritional spray mixtures have been suspected of causing physical damage to watermelon plants, but no recommendations have been made regarding the phytotoxicity of these spray mixtures because of the lack of ex perimental evidence. In addition, little was known about the pesticidal effectiveness of these mix