Disease in Dry Beans Tour - Rust
Rust Rust development is favored by cool to moderate temperatures with moisture conditions that result in prolonged periods of free water on the leaf surface. Multiple disease cycles may occur at 10-14 day intervals under favorable conditions. The earlier the plant becomes infected during its development, the greater the chance for yield loss. Anything that delays plant maturity, such as hail damage, excess nitrogen, or late planting may increase the potential for significant yield losses in the event that a rust epidemic occurs. Certified seed of varieties resistant to the prevalent races of rust in the area is used. When late planting is necessary, susceptiblr varieties are avoided. Incorporation of infected bean debris into the soil after harvest and rotation with non-host crops for a least two years is recommended. Various fungicides are available that can prevent or reduce rust infection if applied early in the epidemic and coverage is thorough. Fields aremonitored frequently during blossom and early pod development for the initial signs of rust. Effectiveness of fungicides will also depend on environmental conditions and irrigation methods. Center pivot systems and frequent rains may wash protectant fungicides off leaves before they can affect the rust spores. |






