Bioecology of rust on Dendranthema grandiflora in Yogyakarta-Indonesia

Rust leaf disease is the main on chrysanthemum (Dendranthema grandiflora) plantations in district of Sleman, Yogyakarta Special Region. In 2006, symptoms rust were initially found farms village Hargobinangun and surrounding areas. Since then it has been consistently spreading to other areas throughout Yogyakarta-Indonesia. Puccinia horiana closely associated with disease. This research was aimed investigate distribution, incidence, severity Yogyakarta. The survey conducted based a randomized stratified approach. entire divided into five observation sites, each location consisting three four farm sites owned by farmers. results showed that distributed all sites. average incidence 97.13%, meanwhile 55.19%. highest Kaliurang 98.44%, followed Wonokerso 98.33%, Gondanglegi 96.87%, Boyong 96.25%, Sidorejo 95.83%. 58.75%, 56.92%, 53.39%, 54.89%, 52.01%. lower plant cultivation site,