Effectiveness of Mansoa alliacea Leaf Extract as Botanical Pesticides to Control Colletotricum acutatum Agent Anthracnose Disease on Chili Pepper

Research on Effectiveness of Mansoa alliacea Leaf Extract as Botanical Pesticides to Control Colletotrichum acutatum Agent Anthracnose Disease on Chili Pepper has been conducted. The results showed that the Mansoa alliacea leaf extract treatment significantly (P <0.05) decreased the percentage of anthracnose disease in chili pepper. Treatment of extract with concentration between 1% to 5% able to inhibitory of anthracnose disease percentage between 30,39% until 100%, while the use of extract 4% and 5% no significant difference (P> 0,05) to the percentage disease. There was negative correlation between extract concentration as anthracnose disease percentage, where the higher concentration of extract formula, the lower the percentage of disease with the equation y = -25,86ln (x) + 42,69 with coefficient of determination (R2) = 0,97. Treatment of Mansoa alliacea leaf extract significantly (P <0.05) decreased the intensity of anthracnose disease in chili pepper. Treatment of extract with concentration between 1% to 5% can decrease disease intensity between 34,31% until 100%, while the use of extract 4% and 5% no significant different response (P> 0,05) to disease intensity. This study proves that there is a negative correlation between extract concentration as anthracnose disease intensity in chili pepper with the equation y = - 25,07ln (x) + 39,16 with coefficient of determination (R2) = 0,99. The higher of concentration of extract used, the result will increase until the optimum concentration (4%), and if the concentration of Manosa alliacea leaf extract used is higher than 4% concentration then the productivity of chili pepper will decrease according to the equation y = -0,013x2 + 0,199x + 0.020 with the coefficient of determination (R2) = 0.85.