Rajmash (Phaseolus vulgaris L.) varietal performance against the incidence of insect pests in the high altitude tribal zone of Andhra Pradesh

Abstract

   Rajmash (Phaseolus vulgaris L.) is a traditional pulse crop cultivated on the hill slopes by the tribal farmers  during from Second fortnight of August – First fortnight of September. The productivity of rajmash is very low due to the use of local vine type  varieties which are highly prone to insect pest attack. A field experiment was conducted at Region Agricultural Research Station, Chintapalle  in three consequent years ie., 2020-21, 2021-22 and 2022-23 to evaluate the performance of rajmash varieties viz., Jwala, Arun, Utkarsh, Arka komal,Uday  and local  check Chintaplle red  and Chintapalle white against the incidence of  insect pests and yellow mosaic disease. The cumulative results indicated that Arun variety has revealed lowest incidence of  flea beetle damage(1.26%), whitefly (1.29/plant)  with a resistance reaction to yellow mosaic disease(<1%) with highest seed yield(4.39q/ha) whereas, the local  check variety Chintapalle red has recorded highest flea beetle damage(2.45%),whitefly (3.07/plant), highest YMV disease(4.84%) with lowest seed yield (1.57q/ha).