NFLUENCE OF DIFFERENT ROOTSTOCKS ON GRAFTING COMPATIBILITY WITH SUMMER TOMATO

Abstract

A field experiment was carried out at the research field of Olericulture Division, Horticulture Research Centre (HRC), Bangladesh Agricultural Research Institute (BARI), Gazipur during the period from April, 2019 to September, 2019 in order to study the resistance level of rootstocks and grafting compatibility with tomato on different rootstocks and their field performance during the summer season of 2019. The experiment was consisted of seven treatment combinations viz.- T 0 = Control (non-grafted tomato seedling of BARI hybrid tomato-10); T 1 = Grafted seedling (tomato grafted on S. sisymbriifolium); T 2 = Grafted seedling (tomato grafted on EG-203); T 3 = Grafted seedling (tomato grafted on Khag-1); T 4 = Grafted seedling (tomato grafted on khag-2); T 5 = Grafted seedling (tomato grafted on khag-3); T 6 = Grafted seedling (tomato grafted on BARI brinjal-8). The experiment was laid out in RCB design with three replications which was set under polytunnels. The results revealed that appropriate rootstock is the prerequisite for successful tomato production based on the grafting technique. The maximum grafting success (86.15%), plant survivability (94.64%), fruit length (7.23 cm), fruit width (5.81 cm), number of fruits plant -1 (33.33), average single fruit weight (48.83 g), total soluble solids (4.53%), days to first harvest (98 days) and longer harvesting duration (27.33 days), fruit yield plant -1 (1.39 kg), and yield ha II

-1 (44.02 tons) was obtained from T 6 (tomato grafted on BARI brinjal-8) treatment. Among the rootstocks, tomato seedling grafted on BARI brinjal-8 showed complete resistance against bacterial wilt and the minimum virus infestation 0.00%, 0.00%, 8.00% and 8.00% at 45 DAS, 60 DAS, 75 DAS and 90 DAS were observed respectively. Considering the growth, yield and yield contributing characters, and resistance potentiality against bacterial wilt and virus infection in field condition, it was revealed that seedling of BARI hybrid tomato-10 grafted on BARI brinjal-8 (T 6 ) was the most suitable rootstock than other rootstocks used in the present study for summer tomato production. Hence, tomato seedling grafted on BARI brinjal-8 may be a suitable option for successful summer tomato production avoiding bacterial wilt disease.