Vol. 12, Issue 11 (2023)

Author(s):
Paramasivan M, Dr. M Bharathikumar, A Thangam, Dr. C Harisudan, Dr. P Indiraganthi and R Baskaran

Abstract:
Sesame is most important oilseed crops of Tamil Nadu, the biotic and abiotic stresses constitute the major yield destabilizing factors. The sesame Powdery mildew and phyllody was observed to be widely distributed the entire Cuddalore and Ariyalur district. A roving survey of sesame fields at 50 percent capsule forming stage in Cuddalore and Ariyalur district each in 7 locations were under taken during Rabi-2023. The maximum disease incidence was recorded at Rajendra Pattinum (36.80%) in severity of sesame phyllody Cuddalore district and Powdery mildew in Authukurichy (28.38%) in Ariyalur district, In fixed plot survey the maximum temperature positive correlate with powdery mildew, Alternaria and Phyllody diseases, in Karif 2022 the maximum temperature only positive correlation of all diseases but in Rabi 2023 there was positive correlation between disease severity and maximum temperature (r=0.63, r=0.54, r=0.58 and r=0.65), morning relative humidity (r=0.61, r=0.73 and r=0.41).