<![CDATA[ The stem borer (Ostrinia furnacalis Guenee) is one of the main pests of corn. The yield loss due to this pest attack reaches 20-80%. These pests are generally controlled chemically, causing various negative effects from the results of control, therefore environmentally friendly control techniques are needed, such as the use of bio-compost and bio-LOF. Bio-compost is compost combined with a consortium of bacteria Serratia marcecens, Bacillus thuringiensis and Pseudomonas fluorescens. Bio-LOF is a liquid organic fertilizer that is processed using cow feces, cow urine, Glicerida leaves and coconut husk. The research objective is to determine the effectiveness of bio-compost with several concentrations of bio-LOF to control stem borer pests in sweet corn. The research was conducted at experimental land of Payakumbuh Agricultural Polytechnic from January to June 2020. This study used a factorial completely randomized design (4x3) with 3 replications. Factor K, namely K1; Tithonia bio-compost, K2; Hay bio-compost. K3; Manure bio-compost. K4: without bio-compost. Factor D are: D1; Bio-LOF concentration 30%, D2; Bio-LOF 20%. D3: without Bio-LOF. The data obtained were analyzed for variance using a statistical program of 8.0, then continued with the dancun test α 5%. The results showed that the three types of bio-compost combined with bio-LOF could reduce the percentage of O. furnacalis pest attack on the stems and tips of sweet corn cobs. There were 5 treatment combinations with very effective criteria for coefficient of relatively control (CRC), namely. Tithonia bio-compost, Bio-LOF 30%, Hay bio-compost, bio-LOF 30%, chicken feces bio-compost, bio-LOF 30%, Straw bio-compost, Bio-LOF 20%, Without bio-compost, Bio-LOF 30%. The concentration of bio-LOF sprayed on the stems and leaves affects the effectiveness of the control where the 30% bio-LOF concentration had the very effective criteria of control, while the 20% concentration had the effective criteria of control. ]]>
