INSIDENSI PENYAKIT LAYU BAKTERI PADA TANAMAN KENTANG (Solanum tuberosum L) DI KECAMATAN MODOINDING

ABSTRACT This reseach aims study the wilt desease of bacterial on potato held in Mondoinding District for 3 monts from January to April 2016. Laboratory studies conducted at the Laboratory of Microbiology and Plant Pathology, Faculty of Agriculture Unsrat Manado and in the field which is in Modoinding District. The research in the laboratory is to determine the pathogenic bacteria the causes wilt disease while in the field is to determine the incidence of the disease thet carried out in the Linelean village, Makaaroyen village and Palelon village using subplots extent of 2 mx 2 m and the spacing used between the plants is 40 cm x 20 cm with the number of samples in each subplot at 22 plants, to study the incidence of the disease by the method of survey and sampling deliberate on potato experiencing symptoms of wilting. The result showed that the characteristic of pathogenic bacterial causing wilt disease on potatoin the Modoinding District that Ralstonia solanacearum, is the symptoms of the plants become wither, the stem becomes brown and rotten. The result of the study the incidence of wilt diseases caused by pathogenic bacteria in the field have differences with the incidence of wilt diseases caused by pathogenic bacteria at each location, with the highest incidence is Linelean village with 51.58%, followed by 44.88% Palelon village and the Makaaroyen village 40.78%. The incidence of bacterial wilt disease in Modoinding district each location of the observations is increasing every week with the highest incidence of will disease caused by pathogenic bacteria is an average of 78.62% and the lowest attack which is an average of 5.45%.