Vol. 12, Special Issue 8 (2023)

Author(s):
Garima Tak, Pradyumn Singh, Anshul Sharma, Chetana Sharma and Shubham Singh

Abstract:
A survey was carried out at different locations in Gwalior at during the year 2021-2022 to investigate the varietal resistance against apical twig gall maker on aonla crop. During the varietal screening the observations were taken from the 46th Standard Meteorological Week to the 19th Standard Meteorological Week during which the gall population was significantly different in all the weeks. The highest average gall population was recorded in Local (desi) variety (6.97 galls/plant) which was significantly higher than all other varieties whereas the lowest average population of gall was found to be in Laxmi-52 variety (5.16 galls/plant) which was significantly lowest among all the varieties. According to the present findings of percent branch infestation, the highest average infestation was recorded in Local (desi) variety (52.30%) which was significantly higher than all the other varieties whereas the lowest average branch infestation was recorded in NA-10 variety (47.69%) which was significantly lowest among all varieties. Summing up varietal screening experiment results of aonla against Betousa stylophoraNA-10 variety, Laxmi-52 variety, Chakaiya variety and NA-6 variety were found to be less susceptible against Betousa stylophora whereas Local (desi) variety, Kanchan variety and NA-7 were found to be most susceptible against Betousa stylophora.