The present study was carried out at Krishi Vigyan Kendra, Undi West Godavari district of Andhra Pradesh to know the yield gap between recommended practice and farmers practice through cluster front line demonstrations. Blackgram farmers of West Godavari district are getting very low yields due to multiple constrains. One of the major constrains of its lower productivity was non adoption of recommended and improved technologies. The KVK, Undi organized cluster front line demonstrations in blackgram to popularize improved crop management practices viz., YMV resistant variety TBG - 104, seed treatment to prevent pests and diseases, integrated pest management practices like spaying of neem oil, need based pesticide application and erection of different sticky traps. The cluster FLDs were conducted in fifty farmers’ fields of West Godavari district during Kharif – 2018 & 2019. The results revealed that the highest seed yield was obtained in demonstration plots with an average yield 17.86 q/ha in comparison to average farmers practice (16.05 q/ha). An average extension gap between demonstrated practices and farmers practices was 1.81 q/ha. Higher net return (52,270 RS/ha) was obtained in the demonstration plot compared to farmers practices (39,681.5 Rs/ha); further benefit cost ratio was recorded higher in front line demonstrations (2.59) as compared to farmers practice (2.13).

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