CD Tesis
Pengggunaan Fungisida Nabati Dari Serai Wangi Dengan Daun Sirih Hutan Untuk Menekan Patogen Fusarium Sp. Pada Tanaman Cabai
ANNA PRIMA PUTRI, NIM. 1910247105, Use of Biofungicides from Citronella with Forest Betel Leaves to Suppress Fusarium sp. Pathogens on Chili Plants, supervised by Zulfarina and Arman Effendi.
Red chilies (Capsicum annum L.) are one of the horticultural plants that are in great demand by Indonesian people. Chili plants in cultivation often experience crop failure due to disease. A disease that often becomes a problem in chili plants is fusarium wilt. Fusarium wilt disease is caused by the fungus Fusarium sp. One way to control disease is to suppress the pathogen Fusarium sp. is to use a biofungicide. The biofungicide that can be used to control fusarium wilt disease is a combination of citronella fungicide and forest betel leaf. This study aims to determine the effect of using several concentrations of a combination of biofungicides from citronella and forest betel leaves to suppress fusarium wilt disease caused by the pathogen Fusarium sp. which is infected on chili plants and to obtain a combination of biofungicides that are able to suppress the pathogen Fusarium sp.
This research is an experimental study using a Completely Randomized Design (CRD) with 11 treatments and three replications to obtain 33 experimental units, then the data obtained was analyzed using analysis of variance (ANOVA). The parameters measured were the percentage of disease attacks, plant height, number of leaves, plant wet weight, and plant dry weight.
The results of the research showed that the parameters of plant height, number of leaves, plant wet weight, and plant dry weight did not have a significant effect between the application of citronella and forest betel leaf plant fungicides. Plant height at 14 DAP and 21 DAP did not have a significant effect on the application of citronella biofungicide mixed with forest betel. The number of leaves at 14 DAP obtained the same data for each treatment so that statistical processing was not used. The number of leaves at 21 DAP showed no significant effect between the application of the biofungicide citronella and forest betel leaves. Observations of plant wet weight and plant dry weight were carried out at 23 DAP after analysis of variance showed that there was no significant effect between the application of citronella plant fungicides and forest betel leaves. The non-significant influence of plant height at 14 DAP, plant height at 21 DAP, number of leaves at 21 DAP, plant wet weight at 23 DAP, and plant dry weight at 23 DAP was thought to be caused by environmental factors. The percentage of disease attacks is presented in qualitative descriptive data. The highest disease attack occurred in P3 (citronella extract concentration 2%, forest betel 6%, with Fusarium sp. infection). The lowest percentage of disease attacks, namely 0%, occurred in plants treated with positive control, P1, P5 and P7. Plants treated with P1, P5, and P7 are thought to be able to adapt to environmental conditions infected with Fusarium sp.
Based on the results of the research that has been carried out, it can be concluded that the use of a combination of biofungicides from citronella and forest betel shows the same effect on the parameters of plant height, number of leaves, plant wet weight and plant dry weight. The highest percentage of disease attacks was found in the treatment of 2% fungicide concentration of citronella extract mixed with 6% forest betel and with Fusarium sp. infection. Meanwhile, plants that can adapt after being infected with Fusarium sp. is a fungicide concentration of 2% citronella extract mixed with 2% forest betel, a 4% fungicide concentration of citronella extract mixed with 4% forest betel, and a 6% fungicide concentration of citronella extract mixed with 2% forest betel. The suggestion in this research is that it is necessary to carry out research with observations of more than 23 HST because this research has not obtained optimal results and it is hoped that observations carried out more than 23 HST will result in more severe fusarium wilt attacks and clearer symptoms of the disease.
Key words: Biofungicide from citronella, biofungicide from forest betel, Fusarium sp. and chili
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