Integrated management of Cercospora leaf spot and powdery mildew of sesame

Abstract

Foliar diseases are the most destructive disease on Sesame. Among the foliar diseases Cercospora leaf spot, Alternaria blight, Powdery mildew and Bacterial blight are important diseases of sesame. Cercospora leaf spot caused by Cercospora sesamicola and powdery mildew caused by Oidium erysiphae are destructive diseases in India. Sesamum indicum has a large number of varieties and are susceptible to many pathogens. The occurrence and severity is location specific based on agro climatic situations. Hence, an attempt was made to identify the effective management practices for Cercospora leaf spot and powdery mildew in Sesame through integrated approach. Results revealed that, seed treatment with Trichoderma viride @ 10 g/kg and furrow application of enriched Trichoderma viride (Trichoderma viride 2.5 kg enriched in 100 kg FYM) @ 250 Kg/ha followed by spray of (Tebuconazole 50% + Trifloxistrobin 25% WG) @ 0.5 g/l recorded least per cent disease index for Cercospora leaf spot and powdery mildew 41.39 and 18.36 respectively, with the highest yield of 17.57 q/ha in treated as compared to untreated check 67.55 and 67.45 per cent disease index for Cercospora leaf spot and powdery mildew respectively, with grain yield of 7.59 q/ha indicating maximum yield loss. The maximum net returns and highest B: C ratio was also obtained in treatment (Tebuconazole 50% + Trifloxistrobin 25% WG) @ 0.5 g/l.

DUS Testing of Sesame (Sesamum indicum L.) Accessions Using Morphological Descriptors and Evaluation for Foliar Diseases of Sesame

“…Necessary plant protection measures were taken to control pest and disease. Due to severe Bacterial leaf blight, Powdery mildew and Cercospora leaf spot diseases during flowering to capsule formation stage, COC (0.2g) + Streptocyclin (0.5g) per litre of water was sprayed to control Bacterial leaf blight and Carbendizim @ 0.1 per cent was sprayed for the effective control of Cercospora leaf spot (Palakshappa et al, 2009) The observations were recorded on plant growth type, plant growth habit, Stem hairiness and branching pattern as plant descriptors. Leaf hairiness, leaf shape, basal leaf margin lobe incision of basal leaf and petiole colour as leaf descriptors.…”