Vol. 10, Special Issue 6 (2021)

Study design: Random Survey.

Place and Duration of Study: Rabi 2019-2020, Department of Entomology Agricultural College, Bapatla

Methodology: A random survey was conducted in three districts of Krishna zone in Andhra Pradesh during rabi 2019-2020 to estimate the incidence of bud necrosis disease in blackgram crop. Five major blackgram growing mandals were selected from Krishna, Guntur and Prakasam districts and three villages from each mandal were selected randomly to carry out the survey regarding percent disease incidence.

Results: Highest per cent mean incidence of bud necrosis disease in blackgram was found i.e. 15.99% in Guntur district. Prakasam district had mean disease incidence of 12.14%. Lowest disease incidence was found in Krishna district with 6.1%. Overall highest mean bud necrosis disease incidence was recorded from Tadikonda mandal of Guntur district with 20.12% followed by Chinaganjam mandal of Prakasam district with 19.81%. Mean per cent disease incidence in all the villages of three districts of Krishna zone ranged in between 1.60% (Vakkalagadda of Challapalli mandal of Krishna district) to 26.56% (Chinthalapudi village of Ponnuru mandal in Guntur district).

Conclusion: Bud Necrosis Disease or leaf curl disease in blackgram crop is becoming key viral disease next to MYMV in major blackgram growing areas in Krishna Zone of Andhra Pradesh. Periodical systematic surveys are necessary to establish disease prediction models and to design suitable management tactics to mitigate the losses caused by Bud Necrosis disease in blackgram crop.