MANAGEMENT OF SESAME PHYLLODY DISEASE THROUGH THE INSECTICIDE IN MADHYA PRADESH, INDIAYashowardhan Singh, K.N. Gupta, Sanjay Kharte and Subahsh Sri Sanjay Malempati
Sesame (Sesamum indicum L.) is one of the important annual oldest oil seed crop grown in tropical to temperate zones in India. It belongs to family Pedaliaceae is native of India and plays an important role in the oilseed economy throughout the world. The sesame crop suffers from phyllody disease caused by phytoplasma. Phyllody disease transmitted through the insect vector, cuscuta and grafting in the form of phytoplasma and phytoplasma move within plants through the phloem from source to sink and they are able to pass through sieve tube elements. Plants infected by phytoplasmas exhibit a wide range of specific and nonspecific symptoms. Symptoms of diseased plants may vary with the phytoplasma, host plant, stage of the disease, age of the plant at the time of infection and environmental conditions. The result indicated that, all the treatments were superior over the control. The effect of different treatments on per cent disease incidence and yield was recorded. The results obtained revealed that all the treatments reduced the disease significantly compared to unsprayed control. Seed treatment with imidacloprid 17.8 SL @ 5 ml/kg + spray of Acetamiprid 20 % SP @ 0.3 g/l recorded the least disease incidence (7.05 %) and highest seed yield of 5.21 q/ha and while seed treatment with imidacloprid 17.8 SL @ 5 ml/kg + spray of azadirachtin 0.03% @ 3ml/l was least effective in which disease incidence of 11.43 per cent was recorded. The disease incidence in untreated check was 14.94 per cent and lowest seed yield of 3.04q/ha was recorded.