Uji Efektivitas Beberapa Jenis Fungisida dan Ketahanan Varietas Padi Ciherang dan Inpari terhadap Isolat Rhizoctonia solani Asal Tanjung Pura

Abstract

Rice leaf sheath blight, caused by the fungus Rhizoctonia solani, is a disease that is currently developing and widespread in rice producing areas in Indonesia. . This disease is very difficult to control because it has a wide host range. This study was aimed to evaluate the effectiveness of several fungicide active ingredients in sup pressing the development of rice leaf sheath blight in Tanjung Pura District, Langkat Regency. Research in the laboratory used a completely randomized factorial design (CRD) with 3 replications and 2 factors. The first factor was the active ingredient, namely: control, Tebuconazole 25%, Difenoconazole 250 g/l, Karbendazim 80%, with 6 levels of concentration (ppm) namely: 0 ppm (control), 5 ppm, 10 ppm, 25 ppm, 50 ppm, 100 ppm as the second factor. While the study in the screen house was carried out with a factorial Randomized Block Design (RBD) with 3 replications and 2 factors namely Fungicide as the first factor consisting of: Tebuconazole 25%, Difenoconazole 250 g/l, Karbendazim 80% , with 2 varieties of rice plants namely: Ciherang and Inpari 32 as the second factor. The results showed that fungicides with the active ingredients Tebucomazole 25% and Difenoconazole 250 g/l were the best treatment in terms of inhibiting the growth of fungal radia, the highest yield production , the number of empty seeds was, the severity of the disease was the lowest, and the lowest incident of disiease.