Selection of potato varieties (Solanum tuberosum L.) in midlands and the effect of using biological agents | IJB_INNSPUB
By: Laurensius Lehar, Tatik Wardiyati, Mochammad Dawam Maghfoer, Agus Suryanto
The study is aimed to produce a potato variety that suits with potato cultivation in midlands as well as to know the effect of using biological agents. The research was conducted from March to July 2015, in Bumiaji and Poncokusumo, two districts in Indonesia. The research was carried out by using Split Plot Design (SPD) consisting of ten treatments and three replications. The treatment was twofold: without and with biological agents (Trichoderma viride, Pseudomonas fluorescents, Streptomyces sp.).
Varieties as the subplots are Granola Lembang, Granola Kembang, Desiree, DTO 28, and Nadiya. The results showed that the five different varieties of potatoes with the provision of biological agents showed different responses to the growth parameters and a decline against Phytophthora infenstan and Ralstonia solanacearum diseases. Nadiya variety treated with biological agents indicates the best growth and the best production in midlands of 18.85 tons/ha-1 in Poncokusumo and 18.80 tons/ha-1 in Bumiaji.
