SOPIALENA-PROSIDING-ICTAFF3

Abstract

Tomato ( Solanum lycopersicum L.) is a vegetable horticultural commodity that has great potential in fulfilling the needs of household consumption, the food processing industry, US well US a mixture of processed ingredients. The last five yearsthe production of tomato plants has declined mainly due to disease attacks, one of which is anthracnose disease caused by a fungus. Colletotrichum sp. which can cause damage to tomatoes in the rainy season seasons. Therefore, it is necessary to control fungal pathogens to reduce disease attacks on tomato plants by using vegetable pesticides, one of which is the application of chrysanthemum flower extract. This research was conducted to identify disease-causing fungi, determine the effect of chrysanthemum flower extract on the fungus, and analyze the best concentration of chrysanthemum flowers extract to controls the fungus that causes anthracnose disease in tomato plants. This research was conducted at the Laboratory of Plant Pests and Diseases (IHPT), Faculty of Agriculture, Mulawarman University from November 2022 to March 2023. A factorial experiment in a completely randomized design with 4 treatments and 10 repetitions was used in this study. The single factors in this study was the inhibition of chrysanthemum flowers extract on fungal growth Colletotrichum sp. the data obtained were analyzed using variance (ANOVA) and further tested using the Least Significant Difference (LSD) test at the 5% level. This study showed that 0.1%, 0.2% and 0.3% concentrations of chrysanthemum flower extract had inhibition of the growth of the tested fungal colonies. Increasing the concentration of chrysanthemum flowers extract showed a bigger areas (zone) of inhibition of fungal growth. The best concentration in inhibiting the growth of the tested mushroom colonies was shown at a concentration of 0.3% on number 34.31%. This shows that the antifungal activity of chrysanthemum flower extract is able to inhibit the growth of the fungal mycelium Colletotrichum gloeosporioides